Water Resources

Basin Plan Project

CGS was contracted by the State Water Quality Control Board to create GIS layers and associated attribution of specific Basin Plan (Water Quality Plan) elements. These elements include, but are not exclusive to, Basin Plan and statewide water quality objectives, beneficial uses, applicable tmdls, and statewide and regional policies. These GIS layers will enable the integration of the various components of the Basin Plans to ensure that all applicable Basin Plan requirements for a particular waterbody, river or area can be determined in a quick and precise manner.

Southern California Wetlands Mapping

This project built on ongoing work by US FWS National Wetland Inventory (NWI), the Resources Agency, the Coastal Conservancy, & SCCWRP to complete an update of wetland and associated riparian habitat maps in Southern California coastal watersheds.

To learn more about the project, please go the following website:

http://www.socalwetlands.com/website/main.htm .

Status and Trends

This study will support EPA’s Strategic Plan Objective 2.2, Increase Wetlands, by providing managers and regulators with Level 1 mapping tools to identify and measure net wetland change by geographic area and wetland type through probabilistic mapping. By leveraging multiple sources of available information, these tools could be used to provide flexible and timely information to inform permit decisions, support watershed planning, and prioritize restoration and mitigation activities. At a higher level, these tools could be used to evaluate wetland programs and inform modifications to improve effectiveness at preventing and mitigating wetland loss.

Stream Periodicity

The goal of this project is to develop a model that predicts stream flow periodicity within the San Diego region to support aquatic bioassesment and monitoring research conducted by SCCWRP, the DFG/ABL, and the San Diego Water Board. This work is to be folded into a larger effort to define a gradient of stream flow periodicity in Southern California as an alternative to the current choice of perennial vs. non-perennial classification.