skip to the content of this page
AZ.gov Arizona's Official Website Arizona Department of Water Resources
Arizona Department of Water Resources AZ.gov Arizona's Official Web Site
Securing Arizona's Water Future
Groundwater Conditions in the San Rafael Basin

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 3.12-5.  Figure 3.12-6 shows aquifer flow direction and water-level change between 1990-1991 and 2003-2004.  Figure 3.12-7 contains hydrographs for selected wells shown on Figure 3.12-6.  Figure 3.12-8 shows well yields in three 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 basin see San Rafael Basin Hydrology.

Major Aquifers

  • The major aquifers in the basin are recent stream alluvium, composed of well-sorted silt, sand and gravel, and basin fill, consisting of clay, silt, sand and gravel.
  • The streambed alluvium and the basin fill are hydrologically connected.
  • Flow direction is generally from north to south.

Well Yields

  • As shown on Figure 3.12-8 well yields in this basin range from less than 100 gallons per minute (gpm) to 1,000 gpm.
  • One source of well yield information, based on 12 reported wells, indicates that the median well yield in this basin is 145 gpm.

Natural Recharge

  • Refer to Table 3.12-5
  • Principal sources of recharge in this basin are mountain-front recharge and infiltration from runoff in washes.
  • The natural recharge estimate for this basin is 5,000 acre-feet per year (AFA).

Water in Storage

  • Refer to Table 3.12-5.
  • Storage estimates for this basin range from 4.0 million acre-feet (maf) to 5.0 maf to a depth of 1,200 feet. 

Water Level

  • Refer to Figure 3.12-6.  Water levels are shown for wells measured in 2003-2004.
  • The Department annually measures 10 index wells in this basin.  Hydrographs for two of these wells are shown in Figure 3.12-7.  More recent hydrographs of the index wells may be available through the Department's GWSI webpage.
  • The deepest recorded water level in 2003-2004 was 205 feet northwest of Lochiel and the shallowest was six feet northeast of Lochiel.

Click to view Table 3.12-5

Click to view Table 3.12-4 Groundwater Data for the

San Rafael Basin

Click to view Figure 3.12-6

Click to view Figure 3.12-6 San Rafael Basin

Groundwater Conditions

Click to view Figure 3.12-7

Click to view Figure 3.12-7 San Rafael Basin Hydrographs Showing Depth to Water in Selected Wells

Click to view Figure 3.12-8

Click to view Figure 3.12-8 San Rafael Basin Well Yields

 

 

Arizona Water Atlas Home

Southeastern Arizona Planning Area Home

Download pdf of entire Southeastern Arizona Planning Area Download pdf of the San Rafael Basin References and Supplemental Reading for the San Rafael Basin
Colorado River Southeastern Arizona Planning Area

Download Southeastern Arizona Planning Area Atlas

Santa Cruz River Flowers