The Caloosahatchee watershed, which covers an area of approximately 1,400 square miles in southwest Florida, is characterized by a relatively flat terrain with an extensive network of wetlands and waterways. Its hydrology is mainly influenced by the Gulf of Mexico, with significant rainfall and runoff from Lake Okeechobee contributing to its surface water flows. The watershed also faces challenges from nutrient pollution, sedimentation, and changes in land use. There is no significant snowpack in this region. The surface water in the watershed contains a variety of constituents, including dissolved oxygen, pH, and nutrients, which are important indicators of water quality. Some interesting climatic facts about the region include its high humidity, with average relative humidity ranging from 60% to 80%, and frequent thunderstorms during the summer months. Trends in the watershed include increasing population density, land development, and urbanization, which pose threats to water quality and habitat for wildlife.