Research Areas > Stormwater > Runoff Characterization

Research Area: Characterization of Dry-Weather and Stormwater Runoff

Contaminants can be introduced into streams, estuaries, and the ocean from a variety of sources. Runoff from both natural and developed land surfaces has the potential to transfer contaminants. Similarly, contaminants can be associated with both stormwater runoff and non-storm discharges. Understanding the sources and patterns of contaminant loading allows managers to identify priorities areas, time periods, or conditions in which runoff control measures would be effective at reducing pollution. In addition, characterization of sources and patterns provides information necessary to calibrate and validate watershed models. It also allows prioritization of future data collection efforts.

SCCWRP Research

Since 2000, SCCWRP scientists have been collecting data from southern California watersheds to better characterize runoff and associated pollutant loading. Sampling efforts are designed to provide an improved understanding of the spatial and temporal patterns of contaminant loading under a variety of conditions. In addition to these research activities, SCCWRP is also engaged in refinement of whole effluent toxicity guidance for stormwater discharge permits. 

SCCWRP runoff characterization research areas include:

• Reference Conditions - Identifying reference conditions by collecting stormwater and non-storm runoff from natural or pristine catchments.
• Stormwater Dynamics - Investigating the dynamics of stormwater runoff by collecting samples form a range of homogenous land use and in-river locations under a variety of storm types.
• Dry-Weather Runoff Pollutant Loading - Characterizing dry-weather runoff and pollutant loading patterns from both urban and non-urban watersheds.