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Hydrology
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Penn State
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Delaware, United States
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1. National Hydrography Dataset (NHD) Waterbody: Delaware
2004. U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details). The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that m...
2. National Wetlands Inventory for Delaware
2009. U.S. Fish and Wildlife Service. This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data...