Iowa Watershed Boundaries: Watersheds (HUC 10)
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The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries...
流域边界数据集（Watershed Boundary Dataset，WBD）界定了地表水汇至某一点的区域范围，涵盖所有陆地与地表区域。流域边界……
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State of Iowa
