Watershed Boundaries, 8 unit (NRCS)

This layer shows the 8-digit Hydrologic Unit Code (HUC-8) boundaries for Maryland, representing subbasin-level drainage areas. These boundaries define the surface water drainage to a specific point, based on topography and water flow.

The data is sourced from the U.S. Geological Survey (USGS) and the USDA’s Natural Resources Conservation Service (NRCS), created through detailed hydrologic mapping and analysis.

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https://www.arcgis.com/home/item.html?id=bed77f657ba64f89bbddce2324a5d5e0
作者 Kara Mobley
最近更新 四月 1, 2026, 19:02 (UTC)
创建的 三月 25, 2026, 18:22 (UTC)