Assess the learner's ability to design an integrated watershed management plan to reduce nutrient (N and P) runoff by applying hydrological modeling for load estimation and scenario analysis; selecting and spatially targeting best management practices (agricultural BMPs, riparian buffers, constructed wetlands, stormwater controls); performing cost-effectiveness and cost–benefit analyses (marginal abatement cost, NPV, lifecycle costs); evaluating trade-offs, uncertainty, and implementation sequencing; and defining monitoring metrics and stakeholder engagement strategies. Scope includes model selection and calibration, BMP performance assumptions, optimization across the watershed, and adaptive management.