Hindcast of water availability in regional aquifer systems using MODFLOW Farm Process

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Abstract

Coupled groundwater and surface-water components of the hydrologic cycle can be simulated by the Farm Process for MODFLOW (MF-FMP) in both irrigated and non-irrigated areas and aquifer-storage and recovery systems. MF-FMP is being applied to three productive agricultural regions of different scale in the State of California, USA, to assess the availability of water and the impacts of alternative management decisions. Hindcast simulations are conducted for similar periods from the 1960s to near recent times. Historical groundwater pumpage is mostly unknown in one region (Central Valley) and is estimated by MF-FMP. In another region (Pajaro Valley), recorded pumpage is used to calibrate model-estimated pumpage. Multiple types of observations are used to estimate uncertain parameters, such as hydraulic, land-use, and farm properties. MF-FMP simulates how climate variability and water-import availability affect water demand and supply. MF-FMP can be used to predict water availability based on anticipated changes in anthropogenic or natural water demands. Keywords groundwater; surface-water; irrigation; water availability; response to climate variability/change

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Hindcast of water availability in regional aquifer systems using MODFLOW Farm Process
Year Published 2015
Language English
Publisher Czech Association of Hydrogeologists
Contributing office(s) California Water Science Center
Description 4 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Predictions for hydrology, ecology, and water resources management: Using data and models to benefit society
First page 311
Last page 314
Conference Title HydroPredict 2008
Conference Location Prague, Czech Republic
Conference Date September 15–18, 2008