The Ohio water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.
The Ohio region, which is listed with a 2-digit hydrologic unit code (HUC) of 05, has an approximate size of , and consists of 14 subregions, which are listed with the 4-digit HUCs 0501 through 0514.
This region includes the drainage of the Ohio River Basin, excluding the Tennessee River Basin. Includes parts of Illinois, Indiana, Kentucky, Maryland, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia and West Virginia.
List of water resource subregions Subregion HUC Subregion Name Subregion Description Subregion Location Subregion Size Subregion Map 0501 Allegheny Subregion Subregion The Allegheny River Basin. Pennsylvania and New York. 0502 Monongahela Subregion Subregion The Monongahela River Basin. Maryland, Pennsylvania, and West Virginia. 0503 Upper Ohio Subregion Subregion The Ohio River Basin below the confluence of the Allegheny and Monongahela River Basins to the confluence with the Kanawha River Basin, excluding the Muskingum River Basin. Ohio, Pennsylvania, and West Virginia. 0504 Muskingum Subregion Subregion The Muskingum River Basin. Ohio 0505 Kanawha Subregion Subregion The Kanawha River Basin. North Carolina, Virginia, and West Virginia. 0506 Scioto Subregion Subregion The Scioto River Basin. Ohio 0507 Big Sandy–Guyandotte Subregion Subregion The Big Sandy and Guyandotte River Basins. Kentucky, Virginia, and West Virginia. 0508 Great Miami Subregion Subregion The Great Miami River Basin. Indiana and Ohio. 0509 Middle Ohio Subregion Subregion The Ohio River Basin below the confluence with the Kanawha River Basin to the confluence with the Kentucky River Basin, excluding the Big Sandy, Great Miami, Guyandotte, Kentucky, Licking and Scioto River Basins. Indiana, Kentucky, Ohio, and West Virginia. 0510 Kentucky–Licking Subregion Subregion The Licking and Kentucky River Basins. Kentucky 0511 Green Subregion Subregion The Green River Basin. Kentucky and Tennessee. 0512 Wabash Subregion Subregion The Wabash River Basin. Illinois, Indiana, and Ohio. 0513 Cumberland Subregion Subregion The Cumberland River Basin. Kentucky and Tennessee. 0514 Lower Ohio Subregion Subregion The Ohio River Basin below the confluence with the Kentucky River Basin, to the confluence with the Mississippi River, excluding the Cumberland, Green, Tennessee, and Wabash River Basins. Illinois, Indiana, and Kentucky.
See also
List of rivers in the United States Water resource region
External links
References