South Carolina Department of Health and Environmental Control

The Waccamaw River Basin (hydrologic unit 03040206) is located in Horry and Georgetown Counties, and encompasses 5 watersheds and 765 square miles. The Waccamaw River Basin incorporates the Lower Coastal Plain and Coastal Zone regions and the AIWW flows through the Coastal Zone region. Of the almost half million acres, 36.9% is forested wetland (swamp), 26.5% is agricultural land, 19.2% is forested land, 10.5% is urban land, 2.8% is scrub/shrub land, 2.2% is nonforested wetland (marsh), 1.7% is water, and 0.2% is barren land. The urban land percentage is comprised chiefly of the Cities of Conway, Georgetown, Myrtle Beach, and North Myrtle Beach.