Planning & Management

Oral

394088 - Hydro-Economics and Ecology of Local Water Supply Potential in Los Angeles

Tuesday, June 5
10:30 AM - 12:00 PM
Location: Greenway GH

Los Angeles County faces a future of reduced imported water. Many agencies are currently considering further investments in local water sources, but studies are typically uncoordinated across urban water sectors or only consider a few cities. Compiling years of research, we examined the hydrologic potential and economic implications of water supplies dominated by local sources. We incorporated economic data into an existing comprehensive model of water resources in LA County to assess financial implications of moving to local water supply. Our results found that LA County can cut imported water use by 50% or more, while still promoting attractive landscapes and economic productivity. Comparing annualized costs of water supply sources, based on historic price increases, shows that alternative local sources are very cost-effective. Agency fragmentation across urban water sectors inhibits accounting and financing that promotes infrastructure investment in local water supply. For instance, stormwater agencies looking to fund new recharge infrastructure often cannot monetize water supply benefits. Agency planning must consider the full cycle of urban water use, including the acquisition, use, treatment, and disposal or reuse of water in comparing water supply sources. The results, published as part of the open-source modeling project Artes, improve regional data access and analysis in LA.

Erik Christian. Porse, PhD

Research Engineer
Office of Water Programs, California State University- Sacramento

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394088 - Hydro-Economics and Ecology of Local Water Supply Potential in Los Angeles



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