The Lower Pee Dee Watershed (HUC 03040201) covers an area of approximately 3,713 square miles in South Carolina, including portions of the Pee Dee River, Waccamaw River, and Black River. The watershed is characterized by a diverse landscape, ranging from forested areas to developed urban areas. Hydrologically, the watershed is influenced by the Atlantic Ocean, which contributes to the overall surface water flow. The area receives a moderate amount of precipitation, with an average of 46 inches per year. Snowfall is rare in this region. The surface water is subject to pollution from agricultural runoff, urban runoff, and wastewater discharge. The reservoirs in the watershed are used for hydroelectric power generation, recreation, and water supply. Interesting climatic facts and trends include an increase in sea level along the coast, causing saltwater intrusion in freshwater areas, and an increase in the frequency and intensity of extreme weather events, such as hurricanes and flooding.