Watershed management is the integrated planning and implementation of practices to protect and improve the water resources, land, and ecosystems within a watershed boundary.
Watershed management is a comprehensive approach to managing water and land resources within the natural hydrologic boundaries of a drainage basin, recognizing that activities anywhere in a watershed can affect water quality and quantity downstream. Effective watershed management integrates science, policy, and stakeholder engagement to address issues such as water quality degradation, flooding, habitat loss, and water supply reliability. Key elements include watershed characterization (mapping land use, soils, hydrology, and water quality conditions), identification of pollution sources and stressors, development of management goals and strategies, implementation of best management practices, and long-term monitoring to evaluate progress. The Clean Water Act's Total Maximum Daily Load (TMDL) program uses watershed-based analysis to determine pollutant load reductions needed to meet water quality standards. Watershed management plans typically address both point and non-point source pollution, stormwater management, riparian corridor protection, wetland conservation, and floodplain management. Collaborative watershed organizations, including conservation districts, river basin commissions, and watershed councils, play a critical role in coordinating management efforts across jurisdictional boundaries. The watershed approach has become the dominant framework for water quality management in the United States and internationally.