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

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San Bernardino Optimal Basin Management

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

Project Chief: Wes Danskin
Phone: 619-225-6132

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.