The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Water Storage Areas. It shows those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval. We have assumed that water storage areas act perfectly and give the same level of protection as when our assessment of the area was carried out. Water storage areas do not completely remove the chance of flooding and can be overtopped or fail in extreme weather conditions.

This dataset is designed to raise awareness of the likelihood of flooding and to encourage people living and working in areas prone to flooding to find out more and take appropriate action.

Flood Storage Areas show those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval. Flood Storage Areas that are not yet shown will be gradually added as information becomes available.

The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Storage Areas. It shows those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval. We have assumed that flood storage areas act perfectly and give the same level of protection as when our assessment of the area was carried out. Flood storage areas do not completely remove the chance of flooding and can be overtopped or fail in extreme weather conditions.This dataset is designed to raise awareness of the likelihood of flooding and to encourage people living and working in areas prone to flooding to find out more and take appropriate action.

Thames Estuary flood storage areas are potential areas of riverside with the primary purpose to receive and store tidal flood flows during large storm surge events. They aim to help reduce extreme flood levels and prevent flooding further upstream. There are four potential flood storage areas which were first identified in the TE2100 Plan (2012). Attribution statement: © Environment Agency copyright and/or database right 2023. All rights reserved.

The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Water Storage Areas. It shows those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval. We have assumed that water storage areas act perfectly and give the same level of protection as when our assessment of the area was carried out. Water storage areas do not completely remove the chance of flooding and can be overtopped or fail in extreme weather conditions. This dataset is designed to raise awareness of the likelihood of flooding and to encourage people living and working in areas prone to flooding to find out more and take appropriate action. Attribution statement: © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH) © Crown Copyright and Database Rights 2025 OS AC0000807064.

Floodmap Flood Storage Areas

PLEASE NOTE: This dataset has been retired. It has been superseded by https://environment.data.gov.uk/dataset/04532375-a198-476e-985e-0579a0a11b47.The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Zone 2 and should not be used without Flood Zone 3. It is our best estimate of the areas of land at risk of flooding, when the presence of flood defences are ignored and covers land between Zone 3 and the extent of the flooding from rivers or the sea with a 1 in 1000 (0.1%) chance of flooding each year. This dataset also includes those areas defined in Flood Zone 3.This dataset is designed to support flood risk assessments in line with Planning Practice Guidance ; and raise awareness of the likelihood of flooding to encourage people living and working in areas prone to flooding to find out more and take appropriate action.The information provided is largely based on modelled data and is therefore indicative rather than specific. Locations may also be at risk from other sources of flooding, such as high groundwater levels, overland run off from heavy rain, or failure of infrastructure such as sewers and storm drains.The information indicates the flood risk to areas of land and is not sufficiently detailed to show whether an individual property is at risk of flooding, therefore properties may not always face the same chance of flooding as the areas that surround them. This is because we do not hold details about properties and their floor levels. Information on flood depth, speed or volume of flow is not included.NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Flood Map for Planning website to indicate where we have new flood risk information. Other data related to the Flood Map for Planning will continue to be updated, including data relating to flood history, flood defences, and water storage areas.

The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Zone 2 and should not be used without Flood Zone 3. It is our best estimate of the areas of land at risk of flooding, when the presence of flood defences are ignored and covers land between Zone 3 and the extent of the flooding from rivers or the sea with a 1 in 1000 (0.1%) chance of flooding each year. This dataset also includes those areas defined in Flood Zone 3.This dataset is designed to support flood risk assessments in line with Planning Practice Guidance ; and raise awareness of the likelihood of flooding to encourage people living and working in areas prone to flooding to find out more and take appropriate action.The information provided is largely based on modelled data and is therefore indicative rather than specific. Locations may also be at risk from other sources of flooding, such as high groundwater levels, overland run off from heavy rain, or failure of infrastructure such as sewers and storm drains.The information indicates the flood risk to areas of land and is not sufficiently detailed to show whether an individual property is at risk of flooding, therefore properties may not always face the same chance of flooding as the areas that surround them. This is because we do not hold details about properties and their floor levels. Information on flood depth, speed or volume of flow is not included.NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Flood Map for Planning website to indicate where we have new flood risk information. Other data related to the Flood Map for Planning will continue to be updated, including data relating to flood history, flood defences, and water storage areas.Defra Network WMS server provided by the Environment Agency

This dataset contains high-resolution (5-minute) raw, atmospheric corrected and mean sea level adjusted water level data for 9 flood storage areas (FSAs) in the Littlestock Brook catchment (a tributary of the River Evenlode, Thames Basin) from 2018 to 2022. The dataset also includes the estimated 9 x FSA stored volume time-series, estimated using a depth-stored volume lookup table for each FSA, produced from a digital elevation model of each feature and a depth-area-volume toolset. The annual barometric pressure time-series used to correct water level is also provided. This dataset was collected by UKCEH as part of a hydrological monitoring programme for the Littlestock Brook Natural Flood Management scheme. This work was supported by the SPITFIRE NERC DTP (NE/L002531/1) and the SCENARIO NERC DTP (NE/L002566/1).

This file contains the land conservation focus areas that provide the greatest benefits to coastal water resources. Focus areas are targeted specifically to address threats associated with existing and future development, including: 1. Pollutant attenuation and removal: riparian buffers that intercept stormwater runoff and at the same time maintain natural cover adjacent to surface waters, and riparian wetlands that are highly efficient at treating pollutants already in surface waters; 2. Flood storage and risk mitigation: areas across the watershed with high flood storage capacities that reduce flood risks to downstream infrastructure, and natural areas that will accommodate sea level rise and salt marsh migration; 3. Public water supply: lands that safeguard surface and groundwater resources for human consumption. A feature class is included for each of the three target focus areas listed above. Additionally, a fourth feature class is included that combines the three focus areas, differentiating between areas of single and multiple target benefits.

The impoundment areas of the flood retention basins (HWRB) on waters 2 are shown. Order at one HQ100 (100 annual flood event). The storage areas correspond to the so-called reservoir area of the technical facility of the HWRB. It is part of the HWRB. The reservoirs form a floodplain on waters 2. Order according to §100 (2) SächsWG. The restrictions in flood areas according to §78 WHG apply here.

--- Additional Information - Category: Hazard Purpose: Update Frequency: Nightly--- Metadata Link - https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=61172

Results of an analysis characterizing the condition of wetland and floodplain storage in the Marengo River Watershed at the sub-watershed catchment scale and also characterize the opportunities to repair storage in catchments that were determined to be highly vulnerable. These characterizations will allow comparison across catchments based on the potential for the underlying stream, wetland, or floodplain to provide flood storage and other ‘slow the flow’ benefits.

As part of a study to quantify floodplain flood attenuation ecosystem services, datasets were developed representing a baseline (current floodplain condition) and counterfactual (floodplain flood storage removed) scenario for 18 sites in the Schuylkill River Watershed, Pennsylvania. This data release contains rasters (3-m resolution) of baseline and counterfactual flood depth grids for the 0.5, 0.2, 0.1, 0.04, 0.02, and 0.01 annual exceedance probability (AEP) scenarios in the Schuylkill River Watershed, Pennsylvania. Depth grid raster datasets were used as input for riverine flood modeling in the Federal Emergency Management Agency HAZUS Program to estimate damages to buildings under various flood intensities. The HAZUS Program is a tool to estimate damages and associated losses due to natural disasters like floods. The data release also contains polyline shapefiles of (1) six floodplain storage volume cross-sections for the 0.01 AEP baseline scenario flood inundation boundary at ...

GHD Pty Ltd was engaged by Liverpool City Council to prepare a Floodplain Management Study for the Liverpool Central Business District (CBD) in accordance with the NSW Floodplain Management Manual. The Liverpool Central Business District (CBD) is at risk of extensive overland flooding, potentially affecting commerce and public safety. During larger events, stormwater runoff from within the CBD catchment exceeds the capacity of the existing local stormwater network. This eventuates in flooding of buildings and business premises, which in turn could lead to expensive clean-up costs, loss of stock, and loss of revenue.

Flood behaviour and flood categorisation was undertaken based on DRAINS model simulations, and a number of floodways and flood storage areas have been categorised throughout the Liverpool CBD. The most severely affected areas include Macquarie, George and Moore Streets. Overland flow in these areas has been simulated at depths in excess of 0.5 m in places and these have been designated as High Hazard areas.

A key objective was to consult with the community and relevant stakeholders to determine the community's attitude to past flooding, to document anecdotal history about flooding, and to assist in developing recommendations that are suitable and acceptable for the community. Businesses were surveyed and a public meeting was held in the Liverpool City Council Chambers on the 28th June 2005. Of the sample of 30 surveyed businesses, all of which were identified in flood affected areas, only six 6 indicated that they had experienced flood impacts. The majority had little awareness of the potential flood impacts to their property. Whilst the low level of flood awareness may be indicative of a turnover of business management, ownership or tenancy, overall this indicates that the CBD business community may not be suitably prepared for flood impacts. The degree of social impact is likely to be greater in a community that is not aware or prepared for the flood event.

A number of flood management options have been investigated, namely property modification, response modification and flood modification. In addition a number of structural drainage solutions have been considered in this and other reports. Works, which divert flow from the South-East catchment away from the main system in Northumberland Street and diverting flow from the Central-North catchment. A new outlet is provided to the Georges River at Moore Street.

Appropriate flood management options and issues were evaluated using a benefit/cost analysis. The results showed that the two structural drainage solutions (Section A works and both Section A and B works) have highest benefit/cost ratio. These are followed by a public flood awareness scheme.

Flood planning levels (FPLs) are an important tool in the management of flood risk .It is recommended that FPLs and controls be adopted for the Liverpool CBD in particular to manage re-development. These should recognise that flooding in the Liverpool CBD is on account of local overland flow and key planning parameters would need to account for the predominantly commercial land use in the CBD.

The total cost of implementing the structural works associated with this study is approximately $7.39M (Section A works only) and $9.89M (Section A and B works) A variety of potential funding sources include the Department of Infrastructure, Planning and Natural Resources through the subsidised Flood Mitigation Program, Council funds, Section 94 contributions from future development, contributions from residents or businesses.

Regional water storage used in the IHS (Integrated Hydrological Target). They are flood areas with a frequency of once every 20 years. Areas that flood once every 20 years or more in the current situation, taking into account climate changes.

Principle in the regional plan, with which the existing flood risk must be taken into account in planning and measures in already built flood areas. Origin:- Regional Planning Association of Upper Lusatia-Lower Silesia with a legal basis Regional Plan, 1. Total update (as of 4.2.2010)

This dataset is an inventory of reservoir details for the UK. It provides information, including reservoir location, type (impounding or non-impounding), use (water resources, hydro-electric, ecological, flood storage, canal), capacity, planning date, construction date, catchment National River Flow Archive (NRFA) gauge references and membership of a reservoir group, based on current usage within the CEH Monthly Hydrological Summary (https://nrfa.ceh.ac.uk/monthly-hydrological-summary-uk). The dataset comprises 273 individual reservoirs, which amount to approximately 90% of total UK reservoir storage. Data quality has been recorded, using a data flag system and a notes section, with references relevant to each reservoir provided. Full details about this dataset can be found at https://doi.org/10.5285/f5a7d56c-cea0-4f00-b159-c3788a3b2b38

Spatial data supporting appropriately located and designed woodland creation to help reduce flood risk by slowing flood flows and increasing the retention and infiltration of water on the land.The layer shows where there is ‘Opportunity for Floodplain’ woodland creation and ‘Opportunity for Wider Catchment’ woodland creation.Appropriately located and designed proposals can help reduce flood risk by slowing flood flows and increasing the retention and infiltration of water on the land by creating; woodland in the wider catchment – creating woodland here can help to, reduce fertiliser and pesticide usage, protect sensitive soils from disturbance and erosion, increase infiltration and reduce water runoff and intercept sediment and chemical pollutants in run-off, reducing the delivery of pollutants to watercourses.Floodplain woodland – creating woodland here can act as a permeable partial barrier to a river when in flood, helping to slow flood flows.Riparian woodland – creating woodland along watercourses can create a buffer between rivers and the adjacent land, reducing water temperature by providing shade and slowing flood flow water delivery to watercourses.Cross-slope woodland – creating smaller areas (typically shelterbelts) of woodland (all types) across hill slopes can reduce rapid runoff from higher land. Trees also encourage infiltration and increase the soil’s water storage capacity.Data input sources:

Spatial prioritisation of catchments suitable for Natural Flood Management (Environment Agency)

Flood Map for Planning (Rivers and Sea) - Flood Zone 3 (Environment Agency)

Soil-derived spatial prioritisation of woodland creation for NFM in the wider catchment (Forest Research).Attributes:

‘LANDSCAPE’ – the targeting category: Opportunity for Floodplain Woodland / Opportunity for Wider Catchment Woodland.

‘AreaHa’ – Area of the feature in hectares.Lineage:

First published to support the woodland creation grant under Countryside Stewardship (CS), launched in 2015. The layer methodology was then revised by Forest Research and the layer was updated in 2022 to cater for the new England Woodland Creation Offer (EWCO) scheme.

A detailed methodology describing the development of this layer can be requested from evidence@forestrycommission.gov.uk.

Flood areas and riparian zones: Flood areas and riparian zones, set up and demarcated in accordance with the Decree of 18 July 2003 on integrated water policy (published in the Belgian Official Gazette of 14 November 2003). In order to plan the necessary space for water, flood areas can be demarcated. Riparian zones can also be demarcated along waterways and non-navigable watercourses, for example with a view to the natural functioning of the water system or nature conservation or to protect against erosion or against the infiltration of sediments, pesticides or fertilisers. Within these demarcated flood areas and riparian zones, a right applies in advance.