Major aquifers, well yields, estimated natural recharge, estimated water in storage, number of index wells and date of last water-level sweep are shown in Table 4.3-5. Figure 4.3-6 shows aquifer flow direction and water-level change between 1990-1991 and 2003-2004. Figure 4.3-7 contains hydrographs for selected wells shown on Figure 4.3-6. Figure 4.3-8 shows well yields in two yield categories. A description of aquifer data sources and methods as well as well data sources and methods, including water-level changes and well yields are found in Volume 1, Appendix A. For more information on groundwater in the Detrital Basin click here.
Major Aquifers
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Major aquifers in the basin include recent stream alluvium, basin fill and sedimentary rock. The principal water-bearing aquifer is the basin fill.
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Flow direction is generally from the south to the north.
Well Yields
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As shown on Figure 4.3-8 well yields in this basin range from less than 100 gallons per minute (gpm) to 500 gpm.
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One source of well yield information, based on six reported wells, indicates that the median well yield in this basin is 31.5 gpm.
Natural Recharge
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The estimate of natural recharge for this basin is 1,000 acre-feet per year (AFA).
Water in Storage
Water Level
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Refer to Figure 4.3-6. Water levels are shown for wells measured in 2003-2004.
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The Department annually measures 11 index wells in this basin. Hydrographs for two index wells (A and C) and one other well are shown in Figure 4.3-7. More recent hydrographs of index wells may be available through the Department's GWSI database.
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The Department measures water levels four times daily at one automated groundwater monitoring site in the west-central portion of the basin.
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The deepest recorded water level in the basin is 597 feet west of Dolan Springs and the shallowest is 68 feet west of Temple Bar.
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Click to view Table 4.3-5 Groundwater Conditions in the Detrital Valley Basin

Click to view Figure 4.3-6 Detrital Valley Basin
Groundwater Conditions

Click for Figure 4.3-7 Detrital Valley Basin Hydrographs Showing Depth to Water in Selected Wells

Click for Figure 4.3-8 Detrital Valley Basin
Well Yields |