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The modified 1:100k Catchments for the Chesapeake Bay Watershed layer is an updated National Hydrography Dataset Plus (NHDPlus) v2.1 catchment layer which incorporates storm drain information in Chesapeake City, Virginia to better reflect flow to the Chesapeake Bay and contains only catchments that contain some flow to the Chesapeake Bay. The authoritative layer contains 83,628 catchments, covering a 170,470.97 square kilometer area. |
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The modified 1:100k Catchments for the Chesapeake Bay Watershed layer is an updated National Hydrography Dataset Plus (NHDPlus) v2.1 catchment layer which incorporates storm drain information in Chesapeake City, Virginia to better reflect flow to the Chesapeake Bay and contains only catchments that contain some flow to the Chesapeake Bay. The authoritative layer contains 83,628 catchments, covering a 170,470.97 square kilometer area. |
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Chesapeake Bay Program.
City of Chesapeake Public Works Department – Engineering Division [Crystal Bloom, Deva K. Borah, Benjamin Umphlett].
The Pennsylvania State University [Gopal Bhatt].
U.S. Geological Survey (USGS) - Lower Mississippi Gulf Water Science Center [Peter R. Claggett, Sarah M. McDonald, Renee L. Thompson].
U.S. Geological Survey (USGS) - Virginia and West Virginia Water Science Center [Gary Shenk]. |
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5000 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The catchment and catchment routing data in NHDv2.1 products are utilized to understand flow to the Chesapeake Bay and to assess water quality impacts to the Bay. The areas of land captured in the catchments representing the watershed are outdated due to man-made storm drains and pumping practices. Additionally, the catchments used to represent the Chesapeake Bay Watershed vary depending on how the catchments were selected. This layer ensures consistent representation of the watershed. The modified Chesapeake Bay Watershed boundary is equivalent to the boundary of the modified catchments. </SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The organizations responsible for generating and funding this dataset make no representations of any kind including, but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data. The data is provided on the condition that neither the USGS nor the U.S. Government, or any of the collaborating organizations shall be held liable for any damages resulting from the authorized or unauthorized use of the data. Although every effort has been made to ensure the accuracy of information, errors may be reflected in data supplied. Possible errors or limitations of the data have been documented but the list is not exhaustive. The user must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions. Credit should always be given to the data source when this data is transferred, altered, or used for analysis.</SPAN></P></DIV></DIV></DIV> |
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Modified NHDPlusV2.1 (100k) Catchments for the Chesapeake Bay Watershed |
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["boundaries","drainage basins","Chesapeake","Mid Atlantic"] |
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en-US |
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150000000 |
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