Sustainable Water Management Project in Orange County
This project involves implementing alternative compliance measures focusing on water retention and quality credits through the use of Low Impact Development Best Management Practices (LID BMPs) in the Fletcher Basin Watershed. The initiative aims to enhance water supply augmentation, sustainable land use planning, and integrated water resource management. By developing case studies and implementation scenarios, the project seeks to achieve drought resilience and improve water quality while promoting environmental benefits.
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Presentation Transcript
OC Fletcher Basin Legacy Campus Project: Alternative MS4 Compliance Matt A. Yeager Mark Grey Chris Crompton Yeager Environmental CICWQ County of Orange 2014 UCI WATER PIRE RETREAT January 25, 2014
Project Drivers for LID BMP Alternative Compliance Model Program MS4 Permit (retention requirement for 85th percentile storm event) LID emphasis NRDC and USEPA Drought resilience-water supply augmentation Sustainable land use planning/Integrated water resource planning
Orange County Background Work Model Water Quality Management Plan-WQMP Technical Guidance Document and Model WQMP preparation tools Coyote Creek WHIMP (Opportunity Analysis) LID BMP Capital and O&M Economics Case Studies On-site LID BMP Installation and O&M Costs Inform BMP feasibility and selection process; Understand cost range of LID program implementation
Current Project Approach Case study analysis of Alternative Compliance Program Elements Fletcher Basin Watershed and Regional Basin Retrofit Campus Legacy Specific Plan One step from implementation in Fletcher Basin construction underway
Project Description Develop LID BMP implementation case studies Fletcher Basin Watershed and Regional Basin Retrofit Distributed on-site LID implementation Campus Legacy Specific Plan Develop several BMP implementation scenarios with infiltration at different scales within the project, including riparian corridor restoration Now Regional in Scope with San Diego, SMC, and possibly SWRCB ongoing coordination
Project Objectives Develop a model alternative compliance implementation project Administration and Agency roles Determine equivalency of on-site retention; water retention value-currency for equivalency-water quality credits-water supply credits Use environmental benefit estimates in value determination (wide range of benefits depending on type of LID BMP used; more than 20 in the LID literature) Establish appropriate methods for calculation Establish benefit priorities
Conceptual Model for Valuing Stormwater Retention LID BMPs Costs Benefits Installation Water Supply Water Unit Value $ Property Water Quality Operation & Maintenance Flood & Stream Protection Infiltration BMP Open Space Replacement Property Value
Conceptual Model for Valuing Stormwater Retention LID BMPs Costs Benefits Water Supply Installation Water Unit Value $ Property Water Quality Operation & Maintenance Flood & Hydromod Protection Harvest and Use BMP Open Space Replacement Property Value
Case Study Concept Used to Test Model Approach: Fletcher Basin Costs Benefits Water Unit Value $ Installation Water Supply Property Water Quality Regional Detention Basin -v- Decentralized LID BMPs Flood and Hydromod Protection Operation & Maintenance Open Space Replacement Property Value
Alternative Compliance Case Study Example: Fletcher Basin Watershed
Link to PIRE Project Economic evaluation process-models for benefits other than those related to water supply augmentation or water quality compliance (recreation benefit, habitat benefit, open space, property value benefit, etc.) Overall review of available evaluation methods How to coordinate Commitments Scope of Work Who, where, when?
