Streamflow data, including average seasonal flow, average annual flow and other information is shown in Table 5.4-2. Flood ALERT equipment in the basin is shown in Table 5.4-3. Reservoir and stockpond data, including maximum storage or maximum surface area, are shown in Table 5.4-4. The location of streamflow gages identified by USGS number, flood ALERT equipment and USGS runoff contours are shown on Figure 5.4-4. Descriptions of stream, reservoir and stockpond data sources and methods are found in Volume 1, Appendix A. Additional information on surface water in this basin can be found in Section 5.4.5 - Perennial/Intermittent Streams and Springs and Section 5.0.5 - Surface Water Hydrology. Where available, the header for each section provides a link to the data web site.
Data from three stations located at the Hassayampa River are shown in the table and on Figure 5.4-4. All of the stations have been discontinued.
The average seasonal flow at most stations is highest in the winter (January-March) and the average seasonal flow is lowest at all stations in the fall (October-December).
The highest annual flow recorded in the basin is 123,076 acre-feet in 1980 at the Hassayampa River at Box Damsite near Wickenburg station. The minimum annual flow was 731 acre-feet in 1981 at the Hassayampa River at Walnut Grove near Wagoneer station.
Flood ALERT Equipment
- Refer to Table 5.4-3.
- As of October 2005 there were 34 stations in the basin.
Reservoirs and Stockponds
- Refer to Table 5.4-4.
- The basin does not contain any large reservoirs.
- Surface water is stored or could be stored in seven small reservoirs.
- There are 266 registered stockponds in this basin.
Average annual runoff is 0.5 inches per year, or 26.5 acre-feet per square mile, in most of the basin with one inch of runoff, or 53.3 acre-feet per square mile, in a small area along the west central basin boundary. There is a small portion on the southwest tip of the basin where the average annual runoff is 0.2 inches per year, or 10.66 acre-feet per square mile.
Click to view Table 5.4-2 Streamflow Data in the
Upper Hassayampa Basin
Click to view Table 5.4-3 Flood ALERT Equipment in the Upper Hassayampa Basin
Click to view Table 5.4-4 Reserviors and Stockponds in the Upper Hassayampa Basin
Click to view Figure 5.4-4 Upper Hassayampa Basin
Surface Water Conditions