Groundwater-Flow Model

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Numerical groundwater-flow models are computer models of groundwater movement. They are effective tools used to simulate and predict the flow of groundwater as it enters aquifers, flows through them, and exits them. An aquifer is an underground layer of permeable rock, sand, and/or gravel that is saturated with water. Water can exit an aquifer by means such as a spring, a seep, or a well.

The Northern Arizona Regional Groundwater-Flow Model (NARGFM)
The Northern Arizona Regional Groundwater-Flow Model (NARGFM) is a numerical model created by United States Geological Survey (USGS) hydrologists who are world-class experts with long-established expertise in groundwater modeling and Arizona hydrology.

The NARGFM represents the culmination of years of investigation by the USGS in cooperation with the Arizona Department of Water Resources and Yavapai County to develop and apply the best available information about the groundwater system across Northern and Central Arizona. The report documenting the NARGRM underwent rigorous USGS review. In fact, this model actually received a higher level of peer review then the standard.

The USGS recently ran the model for both historical and predictive runs. The findings of these runs are included in the April 2013 USGS report: Human Effects on the Hydrologic System of the Verde Valley, Central Arizona, 1910-2005 and 2005-2110. The findings show that groundwater pumping will continue to severely affect the base flow of the Verde River.

Here is summary of the report and a variety of documents you can browse for more information:

The findings of the U.S. Geological Survey’s (USGS) report: Human Effects on the Hydrologic System of the Verde Valley, Central Arizona, 1910-2005 and 2005-2110, using a Regional Groundwater Flow Model are clear, groundwater pumping will continue to severely affect the base flow of the Verde River. This brochure helps summarize what is at risk. … Continue reading

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