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Santa Cruz AMA Surface Water Conditions

Streamflow data, including average seasonal flow, annual flow and other information are shown in Table 8.4-2.  Flood ALERT equipment in the AMA is shown in Table 8.4-3.  Flood ALERT equipment information is current up to October 2005.  New flood warning gages are routinely added to the ALERT network so the current number of stations may be greater.  Reservoir and stockpond data, including maximum storage or maximum surface area, are shown in Table 8.4-4. The location of streamflow gages identified by USGS number, flood ALERT equipment and large reservoirs are shown on Figure 8.4-4.  There are no USGS runoff contours in the Santa Cruz AMA.   Descriptions of stream, reservoir and stockpond data sources and methods are found in Volume 1, Appendix A. 

Streamflow Data

  • Refer to Table 8.4-2.
  • Data from four stations located at three watercourses are shown in the table and on Figure 8.4-4
  • Average seasonal flow is highest at most stations in the summer season (July-September). 
  • The largest annual flow recorded in the AMA is 88,145 acre feet in 1983 at the Santa Cruz River near Nogales gage with a contributing drainage area of 533 square miles. 

Flood ALERT Equipment

  • Refer to Table 8.4-3.
  • There are four ALERT gages in the Santa Cruz AMA.

Reservoirs and Stockponds

  • Refer to Table 8.4-4.
  • The AMA contains two large reservoirs.  The largest, Patagonia, has a maximum storage of 7,540 acre-feet.
  • Surface water is stored or could be stored in four small reservoirs.
  • There are 452 registered stockponds in the Santa Cruz AMA.

Click to view Table 8.4-2

Table 8.4-2 Streamflow Data for the Santa Cruz AMA

Click to view Table 8.4-3

Table 8.4-3 Flood ALERT Equipment in the Santa Cruz AMA

Click here for Table 8.4-4

Table 8.4-4 Reservoirs and Stockponds in the Santa Cruz AMA

          Click to view Figure 8.4-4

Figure 8.4-4 Santa Cruz AMA Surface Water Conditions


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