USGS HUWBD and NHDPlus V2.1 Flow and Velocity
收藏US Fish and Wildlife Service Open Data2026-03-28 收录
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资源简介：
Feature layers containing USGS National Hydrography Dataset Plus Version 2.1 Monthly Flow and Velocity, and the USGS Watershed Boundary Datasets HU2, HU4, HU8, and HU10.
