You are here:
Candidate Causes. Sediments. In: Causal Analysis, Diagnosis Decision Information System, USEPA Website
Citation:
SPEHAR, R. L., S. M. CORMIER, AND D. L. TAYLOR. Candidate Causes. Sediments. In: Causal Analysis, Diagnosis Decision Information System, USEPA Website . U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-08/022, 2007.
Impact/Purpose:
research results
Description:
CADDIS is an online application that helps scientists and engineers in the Regions, States, and Tribes find, access, organize, use, and share information to conduct causal evaluations in aquatic systems. It is based on the USEPA stressor identification process, a formal method for identifying causes of impairments in aquatic systems...Candidate causes are stressors that could be responsible for causing the biological impairment that you are investigating. The pages in this section review basic information on several commonly encountered causes as identified in the navigation box on the right. We also refer readers to aquatic ecology text books such as Allan (1995), Dodds (2002) and Wetzel (2001). The stressors we discuss here appear frequently on U.S. EPA’s 303(d) list of impaired water bodies. We plan to include material for more candidate causes in the future. In particular, we plan to add a module on physical habitat structure. So, please contact us with suggestions for additions...This section deals with the physical effects of both inorganic and organic particles as candidate causes: excessive levels of suspended sediment, excessive levels of deposited and bedded sediment, and insufficient levels of sediment.