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Watersheds clipped to the state border for assessment unit IDs (AUID) that have been assessed as impaired due to excess chloride in the 2020 305(b)/303(d). AUIDs are nearly synonymous with waterbody IDs (WBIDs) in that WBIDs are continuously updated whereas AUIDs are a version of the features tied to a particular Clean Water Act assessment cycle. |
| summary:
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Watersheds clipped to the state border for assessment unit IDs (AUID) that have been assessed as impaired due to excess chloride in the 2020 305(b)/303(d). AUIDs are nearly synonymous with waterbody IDs (WBIDs) in that WBIDs are continuously updated whereas AUIDs are a version of the features tied to a particular Clean Water Act assessment cycle. |
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The New Hampshire Department of Environmental Services, Watershed Management Bureau, Water Quality Planning Section, should be acknowledged as the data source in products derived from these data. |
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5000 |
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[] |
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<DIV STYLE="text-align:Left;"><DIV><DIV><DIV STYLE="font-size:12pt"><P><SPAN>Watersheds clipped to the state border for assessment unit IDs (AUID) that have been assessed as impaired due to excess chloride in the 2016 305(b)/303(d). AUIDs are nearly synonymous with waterbody IDs (WBIDs) in that WBIDs are continuously updated whereas AUIDs are a version of the features tied to a particular Clean Water Act assessment cycle. AUIDs are the basic unit of record for conducting and reporting water quality assessments to EPA. All assessment units are based on 1:24,000 scale hydrography linked to the National Hydrography Dataset (NHD); the national coverage used by EPA. The 2020 AUIDs were the basis for the delineations in this file. Watersheds were delineated using a10m DEM that had been burned with the 24k NHHD and catchment walled. After automated delineation, watershed received a visual evaluation for reliability</SPAN></P></DIV></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><DIV STYLE="font-size:12pt"><P><SPAN>This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, state, or local regulatory bodies are not to reassign to the New Hampshire Department of Environmental Services any authority for the decisions they make. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated, and users are responsible for obtaining the latest version of the data.</SPAN></P></DIV></DIV></DIV></DIV> |
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| title:
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Watershed with Chloride Impairments 2020 |
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| tags:
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["Waterbody ID","WBID","Assessment unit ID","AUID","305(b)","303(d)","Watersheds"] |
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en-US |
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150000000 |
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