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Legend (wbd)

WBDLine (1)
2-digit Hydrologic Unit 2-digit Hydrologic Unit
4-digit Hydrologic Unit 4-digit Hydrologic Unit
6-digit Hydrologic Unit 6-digit Hydrologic Unit
8-digit Hydrologic Unit 8-digit Hydrologic Unit
10-digit Hydrologic Unit 10-digit Hydrologic Unit
12-digit Hydrologic Unit 12-digit Hydrologic Unit
14-digit Hydrologic Unit 14-digit Hydrologic Unit
16-digit Hydrologic Unit 16-digit Hydrologic Unit
2-digit HU (Region) (2)
4-digit HU (Subregion) (3)
6-digit HU (Basin) (4)
8-digit HU (Subbasin) (5)
10-digit HU (Watershed) (6)
12-digit HU (Subwatershed) (7)
14-digit HU (8)