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Cultural Water Demand in the Parker Basin

Cultural water demand data including population, number of wells and the average well pumpage and surface water diversions by the municipal, industrial and agricultural sectors are shown in Table 7.6-8.  Effluent generation including facility ownership, location, population served and not served, volume treated, disposal method and treatment level is shown in Table 7.6-9Figure 7.6-10 shows the location of demand centers.  A description of cultural water demand data sources and methods is found in Volume 1, Appendix A.  More detailed information on cultural water demands is found in Section 7.0.7For information on gpcd and annual water demand by individual community water systems in this basin see ADWR's Community Water System Program annual water use reporting summary.

Cultural Water Demands

  • Refer to Table 7.6-8 and Figure 7.6-10.
  • Population in this basin increased from 11,339 in 1980 to 16,155 in 2000.
  • Most cultural water use is for irrigation on the Colorado River Indian Tribe’s land in the northwestern portion of the basin.
  • Agricultural surface water demand remained relatively constant from 1991 to 2005 with 630,600 acre-feet diverted per year on average in 2001-2005. Agricultural groundwater demand decreased slightly between 1991 and 2005.  
  • Municipal demand is relatively small.  Groundwater demand increased from 2,900 AFA in 1991-1995 to 3,800 AFA in 2001-2005.  Surface water increased from 400 AFA in 1991-1995 to 500 AFA in 2001-2005.
  • There is minimal industrial demand in this basin associated with sand and gravel operations.
  • As of 2005 there were 1,749 registered wells with a pumping capacity of less than or equal to 35 gpm and 191 wells with a pumping capacity of more than 35 gpm.

Effluent Generation

  • Refer to Table 7.6-9.
  • There are 12 wastewater treatment facilities in this basin.
  • Information on population served was available for 10 facilities and information on the volume of effluent generated was available for all 12 facilities.  These facilities serve almost 12,000 people and generate almost 2,200 acre-feet of effluent per year.
  • Two facilities discharges to a watercourse, two facilities discharge for irrigation, one to a golf course and five discharge to unlined impoundments that recharge the aquifer.

Click here for Table 7.6-8

Table 7.6-8 Cultural Water Demand in the Parker Basin

Click here for Table 7.6-9

Table 7.6-9 Effluent Generation in the Parker Basin

Click here for Figure 7.6-10

Figure 7.6-10 Parker Basin Cultural Water Demand


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References and Supplemental Reading for the Parker Basin

Colorado River
Lower Colorado River Planning Area
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Imperial NWR
Parker Dam