Dynamic vs. Quasi-Static Effluent Limits

by Joe Karkoski,

Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water


Selenium water quality objectives are currently being exceeded in the San Joaquin River, California due to agricultural subsurface drainage discharges. The Federal Clean Water Act requires the development of a load allocation for this discharge based on the assimilative capacity of the receiving water. Dynamic effluent limits based on the real time assimilative capacity of the San Joaquin River would allow the discharge of up to 140% more selenium than allowed using quasi-static effluent limits. Further study of the potential environmental and economic cost is required before a regulatory program based on dynamic effluent limits is implemented.

Subject Headings: Water discharge | Effluents | Water quality | Subsurface drainage | Rivers and streams | Selenium | Statics (mechanics) | California | United States

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