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Development and Application of the 2010 Chesapeake Bay Watershed Total Maximum Daily Load Model
Author(s) -
Shenk Gary W.,
Linker Lewis C.
Publication year - 2013
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/jawr.12109
Subject(s) - watershed , environmental science , water quality , hydrology (agriculture) , sediment , total maximum daily load , estuary , watershed management , drainage basin , chesapeake bay , water resource management , environmental resource management , computer science , geography , geology , ecology , paleontology , cartography , biology , oceanography , geotechnical engineering , machine learning
The Phase 5.3 Watershed Model simulates the C hesapeake watershed land use, river flows, and the associated transport and fate of nutrient and sediment loads to the C hesapeake B ay. The Phase 5.3 Model is the most recent of a series of increasingly refined versions of a model that have been operational for more than two decades. The Phase 5.3 Model, in conjunction with models of the C hesapeake airshed and estuary, provides estimates of management actions needed to protect water quality, achieve C hesapeake water quality standards, and restore living resources. The Phase 5.3 Watershed Model tracks nutrient and sediment load estimates of the entire 166,000 km 2 watershed, including loads from all six watershed states. The creation of software systems, input datasets, and calibration methods were important aspects of the model development process. A community model approach was taken with model development and application, and the model was developed by a broad coalition of model practitioners including environmental engineers, scientists, and environmental managers. Among the users of the Phase 5.3 Model are the C hesapeake watershed states and local governments, consultants, river basin commissions, and universities. Development and application of the model are described, as well as key scenarios ranging from high nutrient and sediment load conditions if no management actions were taken in the watershed, to low load estimates of an all‐forested condition.

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