The Lower Tombigbee Watershed (HUC 03160203) covers an area of approximately 6,495 square miles in southwestern Alabama and southeastern Mississippi. The watershed is primarily drained by the Tombigbee River, a major tributary of the Mobile River, which flows into the Gulf of Mexico. The hydrology of the watershed is characterized by a humid subtropical climate with an average annual precipitation of around 60 inches. The region experiences mild winters and hot summers, with occasional severe weather events such as hurricanes and floods. The surface water in the watershed is primarily used for agricultural irrigation, industrial purposes, and municipal water supply. The reservoirs in the watershed contain a variety of constituents, including sediment, nutrients, and dissolved organic matter. Interesting climatic facts and trends in the Lower Tombigbee Watershed include a projected increase in precipitation and temperature in the coming decades due to climate change. This is expected to have significant impacts on water availability, water quality, and ecosystem health in the region.