The document discusses water resources including surface water and groundwater. It provides background on the water cycle, noting that water is continually moving through different states on Earth. It also discusses the distribution of Earth's water, with only 1% available for human use, mostly as groundwater. The document focuses on the Clear Creek watershed in Texas, describing the watershed area, environmental characteristics, flooding issues, and flood reduction measures. It also discusses uses of surface water and the process of water treatment.