California Water Science Center (CAWSC) - Yucaipa Valley Optimal Basin Management (OBM)

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Yucaipa Valley Hydrogeology

Welcome to the U.S. Geological Survey (USGS) Yucaipa Valley Hydrogeology website. This site provides hydrologic data collected or compiled by the USGS in the Yucaipa area; some additional data may be available from the USGS database National Water Information System (NWIS).

Project Chief: Greg Mendez
Phone: 619-225-6176
Email: gomendez@usgs.gov

Conceptual Model

A conceptual model is the basis for the numerical groundwater flow model and is derived mostly from the hydrogeologic setting and hydrogeologic units. A conceptual model is the first step in developing a more quantitative geologic, water-quality, groundwater flow, or water management model. A conceptual model defines the setting, the general structure, the primary processes, and a mass balance for the system being evaluated. The value in preparing a conceptual model is that it facilitates and expedites developing a credible quantitative model. Having a well-thought-out conceptual model helps prevent ending up with a quantitative model that works, might even appear credible, but is wrong in some very basic way. Probably the primary, often fatal criticism of a quantitative model is that it conflicts with a basic conceptual model of the system.