Assess and apply integrated watershed management principles to design and justify a targeted intervention plan that reduces agricultural nutrient runoff and consequent coastal estuary hypoxia; scope includes farm-scale BMPs, nutrient management, riparian buffers and constructed wetlands, land-use planning, hydrologic and biogeochemical modeling (load estimation and scenario comparison), monitoring metrics, cost-effectiveness and trade-offs, and stakeholder or policy instruments for implementation and scaling from fields to estuary.