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Cultural Water Demand in the Duncan Valley 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 3.7-8.  Effluent generation including facility ownership, location, population served and not served, volume treated, disposal method and treatment level is shown on Table 3.7-9.  Figure 3.7-10 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 demand is found in Section 3.0.7. For 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 Demand

  • Population increased only minimally between 1980 and 2000. 

  • Total groundwater use has fluctuated between 1971 and 2005.  The highest average annual groundwater use in this basin was from 1976 to 1980 at 24,000 AFA. 

  • Surface water diversions have also fluctuated between 1971 and 2005.  The highest average annual surface water diversions were from 1981 to 1985 at 22,000 AFA.

  • Years with lower surface water diversions coincide with years of increased groundwater use.

  • All surface water demand between 1991 and 2005 has been for agriculture.

  • The majority of agricultural demand is in the vicinity of Duncan with other small blocks of agricultural demand along Highway 75.

  • The highest concentration of municipal and industrial demand, including a golf course, is along Highway 75 near the small town of York.

  • Industrial demand in this basin is comparable to historic levels with an average of 300 AFA for the period from 1991-2005.

  • Municipal demand has remained relatively constant as well, with an average of 600 AFA for the period from 2001-2005.

  • As of 2005 there were 866 registered wells with a pumping capacity of less than or equal to 35 gpm and 325 wells with a pumping capacity of more than 35 gpm.

Effluent Generation

  • Refer to Table 3.7-9.
  • There is one wastewater treatment facility, the Duncan Wastewater Treatment Facility, located at Duncan.

  • 600 people are served by the facility, which generates 45 acre-feet of effluent per year and disposes it in as overland flow.

Click to view Table 3.7-8

Click for Table 3.7-8 Cultural Water Demand for the Duncan Valley Basin

Click for Table 3.7-9

Click for Table 3.7-9 Effluent Generation in the

Duncan Valley Basin

Click to view Figure 3.7-10

Click for Figure 3.7-10 Duncan Valley Basin

Cultural Water Demand

 

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