How to Use This Model
Model Main Page
The map and figure on the Physical and Chemical Processes Model Main Page provides an overview of the Physical and Chemical Processes Model. The map shows that, for this model, the San Joaquin River is divided into three reaches. Reach 1 extends from Friant Dam to Vernalis, Reach 2 extends from Vernalis to Channel Point, and Reach 3 (the DWSC reach) extends from Channel Point to Disappointment Slough. See Geographic Scope for more information.
The figure below provides a broad overview of the model, showing the flow of DO and oxygen-demanding substances down the San Joaquin River. The focus of the model is DO conditions in Reach 3 (the DWSC).
General (Non-Reach Specific) Information
The Basic Concepts page provides general (non–reach specific) information about each primary driver and the secondary drivers that influence it. This information includes definitions, general scientific principles, and interactions among drivers.
Clicking on one of the reaches on the physical/chemical model home page takes you to a graphic illustrating the primary drivers that influence DO concentrations in that reach.
Clicking on one of the dark blue outcome boxes takes you to a description of the DO and BOD contributed from that reach to the next one (e.g., from Reach 1 to Reach 2).
Clicking on one of the primary drivers takes you to a graphic that depicts the secondary drivers that influence that primary driver. You can either click on the graphic to jump down the page to a reach-specific discussion of a particular secondary driver, or you can simply scroll down the page. The text describes the:
Where alternative hypotheses exist, each is presented, and the sources of data supporting each are listed.
Several tools are included in this model to help make it easier to understand the information presented and to facilitate access to information used in this model.
Links to Other Resources
Links are provide to other websites or information related to DO in the DWSC.