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San Joaquin River Dissolved Oxygen
Welcome to the home page for the San Joaquin River Dissolved Oxygen Total Maximum Daily Load conceptual model.
The RWQCB is in the process of issuing a TMDL under Section 303(d) of the Clean Water Act for the lower San Joaquin River for DO. The CVRWQCB and the California Bay-Delta Authority have sponsored the creation of two web-based conceptual models as tools to understand the physical and chemical conditions in the river that lead to episodes of low DO concentrations and the effects of these low DO episodes on the biological and ecological resources in the river. These models are the focus of this website and have been created in a web-based format to allow easy access to the information in the model and other related information.
To navigate to either the Physical and Chemical Processes Model or the Biological and Ecological Effects Model, click on one of the illustrations below or on the appropriate link on the left side of the page.
If you would like to read information about how to use these models, click on the "About This Conceptual Model" link on the left side of this page. This link will take you to general information about these conceptual models, including what they are, why they were created, the geographic scope of the models, how the models are structured, and how to navigate around the models. This text also contains an acknowledgment of those responsible for creating this model and who to contact for more information.
Access to more information about how to use each of the models is also provided via links on the left side of the main page for each of the models. For more information about the DO TMDL itself and the work being done to comply with it, visit the DO TMDL Technical Work Group web site.