The New Hampshire Hydrography Dataset (NHHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the state's surface water drainage system. The NHHD, developed at 1:24,000 scale, is an extract from the high-resolution National Hydrography Dataset (NHD) housed at the US Geological Survey.The NHHD Shapefile Extract contains the NHDFlowline, NHDWaterbody and NHDArea feature classes from the original NHHD geodatabase. These shapefiles cover the extent of the sixteen cataloging units that intersect the State of NH, and contain reach codes for networked features, stream order, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the the Atlantic Ocean. However, because this data is no longer contained in the original geodatabase, the networking capabilities of the NHDFlowline has been lost.

Diazo copy of Hubbard Brook Watershed Map generated stereophoto- grammetrically based on May, 1956 aerial photography. Shows New Hampshire state plane coordinate system reference points which were projected into UTM Zone 19 and used as reference tics. The streams, ponds, and lakes were manually digitized. This shapefile contains only streams, see hbef_waterbodies for lake and pond polygons. Data distributed as shapefile in Coordinate system EPSG:26919 - NAD83 / UTM zone 19N

The New Hampshire Hydrography Dataset (NHHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the state's surface water drainage system. The NHHD, developed at 1:24,000 scale, is an extract from the high-resolution National Hydrography Dataset (NHD) housed at the US Geological Survey.The NHHD Shapefile Extract contains the NHDFlowline, NHDWaterbody and NHDArea feature classes from the original NHHD geodatabase. These shapefiles cover the extent of the sixteen cataloging units that intersect the State of NH, and contain reach codes for networked features, stream order, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the the Atlantic Ocean. However, because this data is no longer contained in the original geodatabase, the networking capabilities of the NHDFlowline has been lost. This dataset contains data published by USGS in April 2019.

A Designated River Corridor encompasses both the river and the adjacent land area extending the greater of:1,320 feet from the normal high water mark of the designated river, orTo the landward edge of the 100-year floodplain as delineated by the Federal Emergency Management Agency (FEMA).This dataset was constructed using the following process:A 1,320-foot buffer was generated from a composite of New Hampshire Designated Rivers, derived from the NHGS 2022 shapefiles:NHDFlowline (single-line hydrography)NHDAreaNHDWaterbodyPortions of the NHDES "Floodplain100Yr_Dissolve" shapefile that extend beyond the 1,320-foot buffer and are associated with the mainstem of a designated river were then appended to the buffered layer to ensure full corridor coverage.This hybrid approach reflects the regulatory corridor definition while accounting for topographic and hydrologic variability in FEMA floodplain mapping. The final product serves as a visualization tool and planning aid, not a regulatory boundary.Use Constraints:Not intended for site-specific regulatory determinations.Corridor boundaries are approximate and should be verified against FEMA floodplain data and official river designations under RSA 483 for legal or permitting purposes.Intended Use:Public information and outreachPlanning and resource managementSupport for Local River Management Advisory Committees (LACs)Visualization in the NH Designated River Corridors Web Map

The New Hampshire Hydrography Dataset (NHHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the state's surface water drainage system. The NHHD, developed at 1:24,000 scale, is an extract from the high-resolution National Hydrography Dataset (NHD) housed at the US Geological Survey.The NHHD Shapefile Extract contains the NHDFlowline, NHDWaterbody and NHDArea feature classes from the original NHHD geodatabase. These shapefiles cover the extent of the sixteen cataloging units that intersect the State of NH, and contain reach codes for networked features, stream order, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the the Atlantic Ocean. However, because this data is no longer contained in the original geodatabase, the networking capabilities of the NHDFlowline has been lost. This dataset contains data published by USGS in April 2019.

The data in this layer are from a study that evaluated and documented the historic and projected future dredging and dredged material disposal needs of the coastal rivers and harbors of the states of Maine and New Hampshire. Documentation of historic dredging and disposal activities was accomplished through the collection of data primarily from the files of the ACOE, New England Division, in Waltham, Massachusetts, supplemented by information from the states of Maine and New Hampshire and previously published reports. This historic dredging occurred between 1950-1993 and involved 499 dredging events.

Version 3.1 of the ISRIC-WISE database (WISE3) was compiled from a wide range of soil profile data collected by many soil professionals worldwide. All profiles have been harmonized with respect to the original Legend (1974) and Revised Legend (1988) of FAO-Unesco. Thereby, the primary soil data ─ and any secondary data derived from them ─ can be linked using GIS to the spatial units of the digitized Soil Map of the World as well as more recent digital Soil and Terrain (SOTER) databases through the soil legend code.

WISE3 holds selected attribute data for some 10,250 soil profiles, with some 47,800 horizons, from 149 countries. Individual profiles have been sampled, described, and analyzed according to methods and standards in use in the originating countries. There is no uniform set of properties for which all profiles have analytical data, generally because only selected measurements were planned during the original surveys. Methods used for laboratory determinations of specific soil properties vary between laboratories and over time; sometimes, results for the same property cannot be compared directly. WISE3 will inevitably include gaps, being a compilation of legacy soil data derived from traditional soil survey, which can be of a taxonomic, geographic, and soil analytical nature. As a result, the amount of data available for modelling is sometimes much less than expected. Adroit use of the data, however, will permit a wide range of agricultural and environmental applications at a global and continental scale (1:500 000 and broader).

Preferred citation: Batjes NH 2009. Harmonized soil profile data for applications at global and continental scales: updates to the WISE database. Soil Use and Management 5:124–127, http://dx.doi.org/10.1111/j.1475-2743.2009.00202.x

Multiple studies were conducted by the U.S. Geological Survey, in cooperation with the New Hampshire Department of Environmental Services, Water Resources Division, to describe the geohydrology and water quality of stratified-drift aquifers river basins throughout New Hampshire. These studies were published between 1989 and 1998. This shapefile was created by the NH Department of Environmental Services by merging the transmissivity datasets from all the drainage basin study areas. Polygons with no transmissivity values were removed. In areas where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. No formal metadata were created to accompany this shapefile. Aquifer transmissivity is defined as the rate at which water can be transmitted through a unit width of aquifer under a unit hydraulic gradient (Heath 1983). Transmissivity is equal to saturated thickness multiplied by horizontal hydraulic conductivity and is expressed in feet squared per day (ft /d). Data sets available from the 13 studies may include aquifer boundary lines and polygons, transmissivity, saturated thickness, water table, wells, low flow sites, and seismic lines.