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


Model is a broad term encompassing many different aspects of investigating science. In general conceptual models are used to define the general characteristics and components of a physical system and how they interrelate. A mathematical or numerical model takes those concepts, adds the governing equations, and creates a rigorous mathematical framework where the physics of the system must be honored, and hopefully the characteristics of the conceptual model are retained.