The article discusses the Chesapeake Assessment Scenario Tool (CAST), a model simulation tool for the Chesapeake Bay watershed, which spans 64,000 square miles across six states. It highlights how CAST is utilized by various stakeholders—counties, states, and watershed groups—for managing total maximum daily loads (TMDLs), nonpoint source pollution, and municipal stormwater programs. Additionally, the article emphasizes that insights gained from developing this online load estimator can be beneficial for watershed management efforts across the country.
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