The White Oak Bayou watershed (HUC 11140303) covers an area of approximately 136 square miles in southeastern Texas. The watershed is primarily urbanized, with a few rural areas scattered throughout. The hydrology of the watershed is dominated by White Oak Bayou, which is fed by several smaller tributaries. The watershed is relatively flat, with an average elevation of only 25 feet above sea level. The area does not receive significant snowfall, with average annual snowfall less than 1 inch. Surface water in the watershed is heavily managed, with several large reservoirs used for flood control and water supply. The reservoirs contain a variety of constituents, including sediment, organic matter, and nutrients. Interesting climatic facts and trends in the area include the increasing frequency and severity of extreme weather events, such as droughts and floods, as well as rising temperatures and sea levels.