The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. This advice is related to major river flooding only. Other issues, such as stormwater drainage and environmental and ecological considerations are not addressed. This dataset comprises polygons that identify existing residential developments in a defined floodway where building controls are recommended on house extensions, redevelopment and fencing. Note: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS:
FPM Flood Level Points (m AHD) FPM Flood Level Contours (m AHD) FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line FPM Extent of Flooding FPM Levee Banks FPM Location of Cross Sections FPM 1 in 100 (1%) AEP Floodplain Development Control Area FPM Map Index FPM Bridges FPM Special Development Condition Area FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area FPM Floodplain Area The dataset covers the following areas:

Fitzroy River – Fitzroy Crossing Townsite.

Murray River/Peel Inlet - Ballee, Yunderup and Cooleenup Islands, Culleenup Road and Pericho Close.

Glossary:

Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage.

1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning.

Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding.

Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.

This dataset was formerly known as FPM Special Development Condition Area (DOW-039)

This digital terrain model represents historical elevations along the valley of the North Fork Toutle River upstream of its confluence with the Green River in Cowlitz and Skamania Counties, Washington. Most elevations were derived from U.S. Geological Survey 1:62,500 scale topographic quadrangle maps published from 1953 to 1958 that were derived from aerial photographs taken in 1951 and 1952. Elevations representing the bed of Spirit Lake, at the head of the valley, were derived from a bathymetric map based on survey data from 1974. Elevations are in units of meters and have been adjusted to the North American Vertical Datum of 1988.

These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://coast.noaa.gov/slr. This metadata record describes the Washington, Northwest Puget Sound digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications. This DEM includes data for Island, San Juan, Skagit, Snohomish, and Whatcom Counties. The DEM was produced from the following lidar data sets: 1. 2019 NOAA Lidar: Padilla Bay NERR and Skagit River Delta, WA 2. 2016 West Washington Lidar 3. 2014 Island County, WA Lidar 4. 2014 USACE/USGS Topobathy Lidar: Puget Sound (WA) 5. 2014 PSLC Lidar: Cedar River Watershed Project - Delivery 1 6. 2013 Puget Sound Lidar Consortium (PSLC) Nooksack River Lidar 7. 2013 City of Bellingham Lidar 8. 2013 San Juan County, WA Lidar 9. 2009 Puget Sound Lidar Consortium (PSLC) Lidar: San Juan County and Lummi Island 10. 2006 USGS Lidar: North Puget Sound, Washington 11. 2005 Puget Sound Lidar Consortium (PSLC) Lidar: Nooksack River - Lummi Tribe (Puget Sound Lowland Project) The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88, Geoid12B) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 3 meters.

Historically, low-lying land adjacent to rivers and coastlines has been favoured for settlement as they provided sources of fresh water, food, transportation and waste disposal. These areas become affected by flooding during sufficiently heavy or prolonged rainfall, high tides or storm surges and cyclones. In the north-west of the State flooding is most likely to be caused by the summer monsoon or tropical cyclones while floods in the south-west are more likely to occur in response to heavy winter rainfalls. While historical flood records and information extend as far back as 1830, detailed information on peak flood levels is typically limited to the last few decades. This dataset contains the available surveyed peak flood level information for major flood events that have occurred in Western Australia. The flood levels are referenced to the Australian Height Datum (AHD). Note: To see the full scope of the historical flood mapping, 3 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS: FPM Historical Flood Levels (m AHD) FPM Historical Extent of Flooding FPM Historical Floodplain Area Major flood events that have occurred in the past include: Blackwood River (1945, 1955, 1963, 1964, 1982) Collie River (1945, 1963, 1964, 1974, 1982) Fitzroy River (1983, 1986, 1991, 1993, 2002, 2011) Gascoyne River (1960, 1961, 1980, 1995, 2000, 2010) Greenough River (1888, 1927, 1953, 1971, 1988, 1999, 2006) Moore River (1934, 1955, 1961, 1995, 1999) Murray River (1862, 1945, 1955, 1964) Preston River (1964, 1967, 1974, 1983, 1990, 2011) Swan River (1862, 1872, 1945, 1955, 1964, 1983) The historical flood information is used in the Department of Water and Environmental Regulation's floodplain management activities to ensure that floodplains are managed for the benefit of the whole community, minimising the risk and damages and protecting environmental values. Floodplain mapping datasets and floodplain development strategies for rivers and major watercourses in Western Australia are also available from the Department of Water and Environmental Regulation. Note: The ‘Event’ dates in the attribute table are derived from various sources, including Department of Water and Environmental Regulation's Floodplain Management Section reports, records and plans, historical newspaper articles, flood survey information, Bureau of Meteorology rainfall intensity records, on-site flood information and information provided by locals. It is not always possible to obtain an exact date when the flood event has occurred because in some cases the floodwaters may take several days to subside, peaking at different times at various locations over the course, or historical records may only refer to the month or year of the event. However, considering the above date variations the ‘Event’ dates are listed as follows: 22nd December 2010: The day, month and year of the flood event (or rainfall) are known. August 1963: The month and year are known. Exact date unknown. 1954: The year is known but the month and day are unknown. Glossary: Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage. 1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning. Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding. Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.

The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. This advice is related to major river flooding only. Other issues, such as stormwater drainage and environmental and ecological considerations are not addressed. This dataset comprises polygon map sheets that describe the availability of hard copy plans showing the floodplain mapping. Note: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS: FPM Flood Level Points (m AHD) FPM Flood Level Contours (m AHD) FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line FPM Extent of Flooding FPM Levee Banks FPM Location of Cross Sections FPM 1 in 100 (1%) AEP Floodplain Development Control Area FPM Map Index FPM Bridges FPM Special Development Condition Area FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area FPM Floodplain Area The dataset covers the following areas: Avon River - Toodyay to Beverley. Blackwood River – Augusta, Bridgetown, Nannup and Boyup Brook Townsites. Bow River - Bow Bridge Townsite. Capel River - Capel Townsite. Chapman River – Geraldton Townsite. Cohn Creek - Merredin Townsite. Collie River - Collie Townsite. Corrigin Townsite. Denmark River – Denmark Townsite. Fitzroy River – Fitzroy Crossing Townsite. Gascoyne River - Carnarvon Townsite and the Lower Gascoyne. Gordon River – Tambellup Townsite. Greenough River – Indian Ocean to Walkaway. Gribble Creek - Kalgoorlie Townsite. Harding River – Roebourne Townsite. Irwin River - Dongara Townsite. Margaret River – Margaret River Townsite. Murray River - Ravenswood to Blythewood. Nullagine River – Nullagine Townsite. Preston River - Boyanup and Donnybrook Townsites. Serpentine River, Murray River and the Peel Inlet / Harvey Estuary - Peel Inlet / Harvey Estuary to Pinjarra and south to the Darling Scarp (Murray River) and Peel Inlet / Harvey Estuary to Wellard and east to South Western Highway (Serpentine River). Serpentine River - Peel Inlet to Serpentine / Baldivis. Swan River, Canning River and Tributaries: Fremantle to Walyunga National Park (Swan River) and Canning Bridge to Brookton Highway (Canning River). Tributaries include Bennett Brook, Blackadder Creek, Ellen Brook, Helena River, Jane Brook, St Leonards Creek, Susannah Brook (Swan River) and Southern River/ Wungong Brook (Canning River). Toby Inlet – Quindalup Townsite. Vasse-Wonnerup Estuaries, Broadwater & New River - Busselton Townsite. Willyung Creek - Albany. Yakamia Creek – Albany Townsite. Glossary: Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage. 1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning. Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding. Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent. This dataset was formerly known as FPM Map Index (DOW-033)

The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. This advice is related to major river flooding only. Other issues, such as stormwater drainage and environmental and ecological considerations are not addressed. This dataset contains flood levels for a range of modelled design flood events. The full range of possible events are listed in the attribute fields and include: FLDLVL_10 (1 in 10 (10%) AEP flood event) FLDLVL_20 (1 in 20 (5%) AEP flood event) FLDLVL_25 (1 in 25 (4%) AEP flood event) FLDLVL_50 (1 in 50 (2%) AEP flood event) FLDLVL_100 (1 in 100 (1%) AEP flood event) FLDLVL_DFE (Designated flood event) FLDLVL_200 (1 in 200 (0.5%) AEP flood event) FLDLVL_500 (1 in 500 (0.2%) AEP flood event) FLDLVL_MCC (Maximum channel capacity) FLDLVL_PMF (Probable maximum flood event) The flood levels are located at the appropriate cross sections at the centreline of the river / watercourse. Note: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS:
FPM Flood Level Points (m AHD) FPM Flood Level Contours (m AHD) FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line FPM Extent of Flooding FPM Levee Banks FPM Location of Cross Sections FPM 1 in 100 (1%) AEP Floodplain Development Control Area FPM Map Index FPM Bridges FPM Special Development Condition Area FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area FPM Floodplain Area The dataset covers the following areas:

Avon River - Toodyay to Beverley.

Bandy Creek - Esperance Townsite.

Blackwood River – Augusta, Bridgetown, Nannup and Boyup Brook Townsites.

Brunswick River - Greater Bunbury

Bow River - Bow Bridge Townsite.

Capel River - Capel Townsite.

Chapman River – Geraldton Townsite.

Coblinine River & Dorderyemunning Creek - Wagin Townsite.

Cohn Creek - Merredin Townsite.

Corrigin Townsite.

Denmark River – Denmark Townsite.

Five Mile Brook - Bunbury Townsite.

Gordon River – Tambellup Townsite.

Gribble Creek - Kalgoorlie Townsite.

Harding River - Roebourne Townsite.

Irwin River - Dongara Townsite.

Lower Collie River - Greater Bunbury.

Margaret River – Margaret River Townsite.

Nullagine River - Nullagine Townsite.

Preston River - Boyanup and Donnybrook Townsites.

Serpentine River, Murray River and the Peel Inlet / Harvey Estuary - Peel Inlet / Harvey Estuary to Pinjarra and south to the Darling Scarp (Murray River) and Peel Inlet / Harvey Estuary to Wellard and east to South Western Highway (Serpentine River).

Swan River, Canning River and Tributaries: Perth - Fremantle to Walyunga National Park (Swan River) and Canning Bridge to Brookton Highway (Canning River). Tributaries include Bennett Brook, Blackadder Creek, Ellen Brook, Helena River, Henley Brook, Jane Brook, St Leonards Creek, Susannah Brook (Swan River) and Southern River/ Wungong Brook (Canning River).

Toby Inlet – Quindalup Townsite.

Turkey Creek - Warmun Aboriginal Community.

Vasse-Wonnerup Estuaries, Broadwater and New River, Abba River, Buayanup Drain, Ludlow River, Sabina River, Vasse River and Vasse Diversion Drain - Busselton Townsite.

Willyung Creek - Albany Townsite.

Yakamia Creek – Albany Townsite.

For further information on flooding and floodplain management in Western Australia please refer to our Water Facts publications: Flooding in Western Australia (Water facts 13) and Floodplain Management (Water facts 14). This information is available at the following addresses: https://www.wa.gov.au/system/files/2022-11/Water-facts-14-Floodplain-management.pdf https://www.wa.gov.au/system/files/2022-11/Water-facts-14-Floodplain-management.pdf Glossary:

Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage.

1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning.

Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding.

Designated flood event (DFE) - used for planning purposes and is generally the 1 in 100 (1%) AEP "designed" flood event. However, a designated flood event could be based on an "actual" flood event (e.g. Moora 1999 flood event) or an alternative scenario (i.e. Yakamia Creek - 1 in 100 (1%) AEP flood event plus sea level rise).

Maximum channel capacity (MCC) - the maximum flow that a waterway can contain before breaking out across the floodplain during a flood event.

Probable maximum flood (PMF) - the largest flood that could conceivably occur at a particular location, resulting from probable maximum precipitation. The PMF defines the extent of flood-prone land. Generally, it is not physically or financially possible to provide general protection against this event.

Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.

The shoreline essentially follows the 8 foot contour line, except where the ortho offered further clarification. That 8 foot contour line matches closest to what NAVD88 shows as "mean high water" (see official definition below) at 7.97 feet. MEAN HIGH WATER (MHW): "A tidal datum. The average of all the high water heights observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent datum of the National Tidal Datum Epoch." Source "The MHW line along the tidal shoreline is represented by the contour line that is 8.0' above the NAVD 88. The MHW elevation is not necessarily an equipotential (level) surface, but the variation from a level surface is not significant for this project. The determination of MHW is based on 18 yrs of tidal data and represents the latest official National Tidal Epoch of 1960-1978. The Seattle Tide Station (Sta No 944-7130) is located at the downtown ferry terminal." Source: From paper by Nick Bodnar 10/18/1993 Some other definitions regarding these shorelines (from Nick Bodnar, 10/18/1993): LAKES UNION AND WASHINGTON SHORELINE (18.6' above NAVD 88) The approximation of "ordinary high water"; the level of Lk Washington varies from 17.0'-18.6' during the year; the max lake elevation is 18.8' as controlled by Corps of Engineers (COE) at Hiram Chittenden Locks. The NAVD 88 lake elevations have been converted from the U.S. Engineers Datum. This zero of NAVD 88 is 3.25' above the Locks Datum at the common bench mark P-7. The shoreline contour of 18.8' above NAVD 88 should be used from the Locks, upstream through Lk Union and Lk Washington. The COE has performed various studies that show the level of Lk Wash to approximate an equipotential surface that can be represented by a single contour elevation for mapping purposes. OTHER LAKES The shoreline around Green Lake and all other lakes are delimited by the water/land interface as seen on the aerial photography.

Displays data from CARTO.SHORE_LN

Updated as needed.

The profile baseline shows the path of flood flows on the FIRM and is an accurate representation of the distance between cross sections, structures, nodes, or grids in the hydraulic model. The profile baseline is used for replicating the stationing and water-surface elevations found in the FIS report profiles, but in GIS format. This information is used in the following tables within the FIS report: Flooding Sources Included in this FIS report, Principal Flood Problems, Summary of Hydrologic and Hydraulic Analyses, Summary of Topographic Elevation Data Used in Mapping, the Stream-by_Stream Vertical Datum Conversion, and Summary of Contracted Studies Included in this FIS Report.

This layer is a component of Region Preliminary Data.

This data set contains both true color (RGB) and infrared (IR) ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative for the Merrimack River - Plum Island Sound region of Massachusetts. The source imagery was acquired on 20110619. The images were acquired with an Applanix Digital Sensor System (DSS). The original images were acquired at a higher resolution than the final ortho-rectified mosaic. Ortho-rectified mosaic tiles are an ancillary product of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data.

Data for this region are in two subdirectories, which hold RGB and IR imagery for both mean high water (MHW) and mean lower low water (MLLW) periods. (MLLW, i.e. the average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch).

Imagery is in .tif format with associated browse graphic (.jpg), .omd, .his, and metadata files in Federal Geographic Data Committee (FGDC) format.

The ground sample distance (GSD) for each pixel is 0.50 m.

The flight and images produced under this task order have been supplied to Nez Perce County for use in the development of the geographic information system (GIS) for the county of Nez Perce, Idaho and Lewis Clark Valley area. Digital orthophotos are aerial images corrected for displacement caused by relief in the Earth's surface, camera/sensor lens distortion and tilting of the sensor at the time of image acquisition. Additionally, orthophotos are assigned a uniform scale, which allows an end-user the ability to derive accurate measurements from the imagery. Orthophotos can be used as an accurate record of landscape conditions at the time of the corresponding aerial imagery. As such, the digital orthophotos are used in a variety of applications, such as environmental monitoring, facility engineering/maintenance, city/county planning, property line review, etc. The digital orthophoto can be used alone or as a raster base map for corresponding vector line mapping. These data are horizontally referenced to the North American Datum of 1983 (NAD83) 2011, Idaho: State Plane Idaho West Zone (Idaho portions) and vertically referenced to the North American Vertical Datum of NAVD 1988. Survey Feet have been adjusted to ground for the Idaho portions. Units are in U.S. Foot.

These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://coast.noaa.gov/slr.

 This metadata record describes the North Carolina, Middle 1 digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications. This DEM includes data for Beaufort, Bertie, Hertford, Hyde, Martin, Pitt, Tyrrell, and Washington Counties.

 The DEM was produced from the following lidar data sets:
 1. 2014 NGS Coastal Mapping Program Topobathy Lidar: Post-Sandy Atlantic Seaboard
 2. 2014 NC Statewide Lidar - Phase 1

 The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 3 meters.

Historically, low-lying land adjacent to rivers and coastlines has been favoured for settlement as they provided sources of fresh water, food, transportation and waste disposal. These areas become affected by flooding during sufficiently heavy or prolonged rainfall, high tides or storm surges and cyclones. In the north-west of the State flooding is most likely to be caused by the summer monsoon or tropical cyclones while floods in the south-west are more likely to occur in response to heavy winter rainfalls. While historical flood records and information extend as far back as 1830, detailed information on peak flood levels is typically limited to the last few decades. This dataset shows the area of inundation (polygons), i.e., the floodplain area that has occurred during the major flood events in Western Australia. Note: To see the full scope of the historical flood mapping, 3 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS:
FPM Historical Flood Levels (m AHD) FPM Historical Extent of Flooding FPM Historical Floodplain Area The major flood events that are covered in this dataset are: Bow Bridge Townsite (June 1988) Corrigin Townsite (January 1982) Esperance Townsite (January 2007) Kupungarri to Willare (including Dales Yard & Mount Joseph gauging stations) - Fitzroy River (January 2023) Lake Grace Townsite (January 2006) Merredin Townsite (February 1979) Perth (February 2017) Tambellup Townsite (January 1982) Warmun Aboriginal Community (March 2011) York Townsite (July 2021, August 2022) Other major flood events that have occurred in the past include: Blackwood River (1945, 1955, 1963, 1964, 1982) Collie River (1945, 1963, 1964, 1974, 1982) Fitzroy River (1983, 1986, 1991, 1993, 2002, 2011) Gascoyne River (1960, 1961, 1980, 1995, 2000, 2010) Greenough River (1888, 1927, 1953, 1971, 1988, 1999, 2006) Moore River (1934, 1955, 1961, 1995, 1999) Murray River (1862, 1945, 1955, 1964) Preston River (1964, 1967, 1974, 1983, 1990, 2011) Swan River (1862, 1872, 1945, 1955, 1964, 1983) The historical flood information is used in the Department of Water and Environmental Regulation's floodplain management activities to ensure that floodplains are managed for the benefit of the whole community, minimising the risk and damages and protecting environmental values. Floodplain mapping datasets and floodplain development strategies for rivers and major watercourses in Western Australia are also available from the Department of Water and Environmental Regulation. GLOSSARY:

Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage.

1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning.

Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding.

Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.

Data provided are the scale of polygonal datasources used to generate the polygon derived surfaces for the intensive agricultural areas of Australia. Data modelled from area based observations made by State soil agencies.The final ASRIS polygon attributed surfaces are a mosaic of all of the data obtained from various state and federal agencies. The surfaces have been constructed with the best available soil survey information available at the time. The surfaces also rely on a number of assumptions. One being that an area weighted mean is a good estimate of the soil attributes for that polygon or mapunit. Another assumption made is that the lookup tables provided by McKenzie et al. (2000), state and territories accurately depict the soil attribute values for each soil type.The accuracy of the maps is most dependent on the scale of the original polygon data sets and the level of soil survey that has taken place in each state. The scale of the various soil maps used in deriving this map is available by accessing darasource grid, the scale is used as an assessment of the likely accuracy of the modelling.The Atlas of Australian Soils is considered to be the least accurate dataset and has therefore only been used where there is no state based data.Of the state datasets Western Australian sub-systems, South Australian land systems and NSW soil landscapes and reconnaissance mapping would be the most reliable based on scale. NSW soil landscapes and reconnaissance mapping however, may be less accurate than South Australia and Western Australia as only one dominant soil type per polygon was used in the estimation of attributes, compared to several soil types per polygon or mapunit in South Australia and Western Australia. NSW soil landscapes and reconnaissance mapping as the name suggests is reconnaissance level only with no laboratory data. The digital map data is provided in geographical coordinates based on the World Geodetic System 1984 (WGS84) datum.

See further metadat for more detail.

This is a tiled collection of the 3D Elevation Program (3DEP) and is one meter resolution. The 3DEP data holdings serve as the elevation layer of The National Map, and provide foundational elevation information for earth science studies and mapping applications in the United States. Scientists and resource managers use 3DEP data for hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. The elevations in this DEM represent the topographic bare-earth surface. USGS standard one-meter DEMs are produced exclusively from high resolution light detection and ranging (lidar) source data of one-meter or higher resolution. One-meter DEM surfaces are seamless within collection projects, but, not necessarily seamless across projects. The spatial reference used for tiles of the one-meter DEM within the conterminous United States (CONUS) is Universal Transverse Mercator (UTM) in units of meters, and in conformance with the North American Datum of 1983 ...

Abstract

This dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.

National dataset of Australia's Ramsar Wetlands.

The Convention on Wetlands of International Importance (the Ramsar Convention) was signed in Ramsar, Iran on 2 February 1971. The Ramsar Convention aims to halt the worldwide loss of wetlands and to conserve, through wise use and management, those that remain. The Convention encourages member countries to nominate sites containing representative, rare or unique wetlands, or that are important for conserving biological diversity, to the List of Wetlands of International Importance (Ramsar sites). Australia was one of the first countries to become a Contracting Party to the Convention and designated the world's first Ramsar site, Cobourg Peninsula, in 1974.

This project was initiated by the Wetlands Section of the Australian Government Department of the Environment. Spatial data was sourced from the relevant State and Territory agencies and compiled into a single national coverage.

Credit:

(c) Commonwealth of Australia, Department of Environment with data compiled through cooperative efforts of the States/Territories Government wetland agencies.

April 2015.

Credit:

ACT Government, Environment and Planning Directorate,

Credit:

NSW Office of the Environment and Heritage,

Credit:

NT Department of Land Resource Management,

Credit:

Qld Department of Department of Environment and Heritage Protection,

Credit:

SA Department of Environment, Water and Natural Resources,

Credit:

Tas Department of Primary Industries, Parks, Water and Environment,

Credit:

Vic Department of Environment and Primary Industries,

Credit:

WA Department of Environment and Conservation.

Purpose

This project was initiated by the Wetlands Section of the Australian Government Department of the Environment. Spatial data was sourced from the relevant State and Territory agencies and compiled into a single national coverage.

Dataset History

This dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.

This dataset is a polygon dataset which amalgamates spatial boundaries provided by data custodians to produce a national dataset

Data received from each State or Territory were compiled by ERIN and verified by the Wetlands Section of the Australian Government Department of the Environment.

The boundaries are supplied by the custodian States and Territories, no alterations have been made to boundaries except for datum/projection transformations.

Note: The data in the final coverage contains data captured from different sources including Satellite imagery, orthophoto, digitising 1:100 000 maps and smaller scale. SOURCE field contains general description of input data source.

Data were compiled using ArcGIS software.

Updates

Gwydir - Windella boundary updated (5/12/06) from NSW NPWS map file coordinates (ruled in court case to be the legal boundary). Coordinates were provided in AGD66 and projected to GDA94 using the AGD_1966_To_GDA_1994_4 transform.

December 2006 - updated attribute table to include juresdiction, total_site_area_ha and designation_date fields.

November 2007 - Paroo River Wetlands added as 65th site.

April 2009 - Complete update of NSW boundaries with INTERIM boundaries supplied by NSW DECC on 13/3/09. All NSW boundaries were replaced by the boundaries in the supplied dataset. This is for use internally until final boundaries supplied by DECC. Note that the designation date of Lake Pinaroo was incorrect and was changed by DEWHA with permission from DECC. Detailed information on the changes at each site are included in the data supplied by the custodian.

May 2009 - Complete update of VIC boundaries with data provided by DSE. Only boundary changes are to Western Port and Port Phillip Bay and Bellarine Peninsula which were updated with improved mapping.

April 2010 - NSW boundaries updated with revised boundaries from NSW DECC. Shortlands within Hunter Estuary, and Goddard's Lease in Gwydir were surveyed by consultants and have been updated.

April 2010 - Marine boundaries were updated as a result of boundary review to align with the Marine Parks. Minor changes only (datum errors have been corrected).

June 2010 - Kakadu National Park, Hosnies Spring and Pulu Keeling National Park updated. Kakadu National Park was merged from two sites into one; datum errors in Hosnies Spring have been corrected and Pulu Keeling updated to represent the National Park boundary.

June 2010 - WA boundaries replaced with boundary dataset from WA DEC to ensure consistency. Minor data processing changes only (generally less than 4m).

October 2010 - Kakadu National Park, Hosnies Spring and the Dales updated. An error was found in the CAPAD boundaries for these, so they have been updated with new boundaries supplied by Parks.

November 2010 - All Tasmanian Ramsar Wetland boundaries were updated following the provision of new data from the state. Further changes were made in late November with new data being obtained for Apsley Marshes and Moulting lagoon.

June 2011 - Victorian boundaries updated for all sites with the exception of Western Port and Port Phillip Bay and Bellarine Peninsula which were updated in May 2009.

June 2011 - Coorong boundary updated with data provided by South Australian DEH.

July 2011 - Hattah-Kulkyne updated with new data provided by Vic DSE. The new boundary is based on aerial photography to interpret the high water mark of the lake extent.

July 2011 - Ginini Flats updated with new boundary from ACT Department of Territory and Municipal Services.

September 2013 - Piccaninnie ponds added from data provided by SA Department for Environment and Heritage.

Quality

Scope: Dataset

External accuracy:

Variable due to numerous sources

Non Quantitative accuracy:

100%, unique Refcode being the important item.

Conceptual consistency:

No information provided beyond normal procedures for compiling GIS data.

Completeness omission:

Complete

Dataset Citation

Department of the Environment (2015) Ramsar Wetlands of Australia. Bioregional Assessment Source Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/d65cc156-944d-4961-bfba-eacfd61db63a.

The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. This advice is related to major river flooding only. Other issues, such as stormwater drainage and environmental and ecological considerations are not addressed. This dataset contains the location of levee banks (polylines) that mitigate the risk of flooding to the community and reduce potential property damage during major flood events. Note: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS: FPM Flood Level Points (m AHD) FPM Flood Level Contours (m AHD) FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line FPM Extent of Flooding FPM Levee Banks FPM Location of Cross Sections FPM 1 in 100 (1%) AEP Floodplain Development Control Area FPM Map Index FPM Bridges FPM Special Development Condition Area FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area FPM Floodplain Area The dataset covers the following areas: Avon River - Northam Townsite. Capel River - Capel Townsite. Cohn Creek - merredin Townsite. Corrigin Townsite. Exmouth Townsite. Five Mile Brook - Bunbury Townsite. Gascoyne River - Carnarvon Townsite. Greenough River – Indian Ocean to Walkaway. Serpentine River - North of Lake Amarillo. Vasse-Wonnerup Estuaries, Broadwater & New River - Busselton Townsite. Glossary: Annual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage. 1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning. Floodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding. Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent. This dataset was formerly known as FPM Levee Banks (DOW-034)

The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain …Show full descriptionThe Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. This advice is related to major river flooding only. Other issues, such as stormwater drainage and envirionmental and ecological considerations are not addressed. Both the floodway and flood fringe make up the 1 in 100 (1%) annual exceedence probability (AEP) floodplain, however there are areas where the floodplain exists but the floodway and flood fringe does not. In such situations, a different floodplain management strategy applies (for example, the Swan River between the Narrows and Canning Bridges). This dataset comprises two polygons - Flood fringe, and Floodway. The flood fringe is that part of the floodplain where development may be considered acceptable subject to certain building conditions that will provide adequate flood protection. The floodway is that part of the 1 in 100 (1%) AEP floodplain where development that is considered obstructive to major flows is not acceptable as it would increase flood levels upstream. No new buildings are acceptable in the floodway. Note: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order: FLOODPLAIN DATASET LAYERS: FPM Flood Level Points (m AHD) FPM Flood Level Contours (m AHD) FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line FPM Extent of Flooding FPM Levee Banks FPM Location of Cross Sections FPM 1 in 100 (1%) AEP Floodplain Development Control Area FPM Map Index FPM Bridges FPM Special Development Condition Area FPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area FPM Floodplain Area The dataset covers the following areas: Avon River – Toodyay, Northam, York and Beverley Townsites. Blackwood River – Augusta, Bridgetown, Nannup and Boyup Brook Townsites. Brunswick River - Greater Bunbury Coblinine River & Dorderyemunning Creek - Wagin Townsite. Collie River - Collie Townsite. Chapman River – Geraldton Townsite. Denmark River – Denmark Townsite. Gascoyne River - Carnarvon Townsite and the Lower Gascoyne. Gribble Creek - Kalgoorlie Townsite. Harding River - Roebourne Townsite. Irwin River - Dongara Townsite. Lower Collie River - Greater Bunbury. Preston River - Donnybrook Townsite. Serpentine River, Peel, Birrega & Oaklands Drains, Murray River and the Peel Inlet / Harvey Estuary - Peel Inlet / Harvey Estuary to Pinjarra and south to the Darling Scarp (Murray River) and Peel Inlet / Harvey Estuary to Wellard (Peel Main Drain), east to South Western Highway (Serpentine River) and north to Wungong Brook (Birrega Drain). Swan River, Canning River and Tributaries: Perth - Fremantle to Walyunga National Park (Swan River) and Canning Bridge to Brookton Highway (Canning River). Tributaries include Bennett Brook, Blackadder Creek, Ellen Brook, Helena River, Henley Brook, Jane Brook, St Leonards Creek, Susannah Brook (Swan River) and Southern River/ Wungong Brook (Canning River). Toby Inlet – Quindalup Townsite. Vasse-Wonnerup Estuaries, Broadwater and New River - Busselton Townsite. For further information on flooding and floodplain management in Western Australia please refer to our Water Facts publications: Flooding in Western Australia (Water facts 13) and Floodplain Management (Water facts 14). This information is available at the Department of Water and Environmental Regulation's website at the following address: http://www.water.wa.gov.au/Publications/Find+a+publication/default.aspx - Under 'Find a publication' click on 'Series Browse' (3rd column from the left) and scroll DWERn to 'Water Facts' and select '+' button located on the right of the heading to open the PDF's Glossary: Annual exceedance probability (AEP) - the likelihood of occurance of a flood of a given size or larger in any one year; usually expressed as a percentage. 1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's life time. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning. Flood fringe - the area of the floodplain, outside of the floodway where development could be permitted provided it is compatible with flood hazard and building conditions provide an adequate level of flood protection. These areas are generally covered by still or very slowly moving waters during a 1 in 100 (1%) AEP flood. Floodplain - the portion of a river valley next to the river channel which is covered with water when the rier overflows its banks during major river flows. The term also applies to land adjacent to estauries which is subject to flooding. Floodway - the river channel and a portion of the floodplain where a significant flow or storage of water occurs during floods. If the floodway is even partially blocked then the natural flooding regime of th area may be detrimentally impacted with flood levels being raised and affecting areas which may not have been previously affected. Development in floodways is to be avoided wherever possible. Australian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.

Global Positioning System (GPS) satellite navigation validation marks are unique visible markers located at a number of public boat ramps and associated jetties, which mariners or owners of portable GPS units can use to validate their position and map datum settings. Show full description