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Surface Water Conditions in the Sacramento Valley Basin

Streamflow data, including average seasonal flow, average annual flow and other information is shown in Table 4.9-2.  Flood ALERT equipment in the basin is shown in Table 4.9-3.  Reservoir and stockpond data, including maximum storage or maximum surface area, are shown in Table 4.9-4.  The location of streamflow gages identified by USGS number, flood ALERT equipment and USGS runoff contours are shown on Figure 4.9-4.  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 4.9.5 - Perennial/ Intermittent Streams and Springs and Section 4.0.5 - Surface Water Hydrology. Where available, the header for each section provides a link to the data web site.  

Streamflow Data

  • Refer to Table 4.9-2
  • Data from one discontinued station located at the Colorado River near Topock is shown in the table and on Figure 4.9-4.  The period of record is from 1917 to 1982.

  • The average seasonal flow was highest in the spring (April-June) and lowest in the fall (October-December).

  • Maximum annual flow at this station was 21,827,922 acre-feet in 1921 and minimum annual flow was 4,316,354 acre-feet in 1934.

Flood ALERT Equipment

  • Refer to Table 4.9-3.
  • As of October 2005 there were 12 stations in the basin.

Reservoirs and Stockponds

  • Refer to Table 4.9-4.
  • The basin contains five small reservoirs.
  • There are 44 registered stockponds in this basin.

Runoff Contour

  • Refer to Figure 4.3-4.
  • Average annual runoff is 0.5 inches per year, or 26.65 acre-feet per square mile, in the northeastern portion of the basin and decreases to 0.1 inches, or 5.33 acre-feet per square mile, in the center of the basin.

Click to view Table 4.9-2

Click to view Table 4.9-2 Streamflow Data for the

Sacramento Valley Basin

Click to view Table 4.9-3

Click to view Table 4.9-3 Flood ALERT Equipment in the

Sacramento Valley Basin

Click to view Table 4.9-4

Click to view Table 4.9-4 Reservoirs and Stockponds in the

Sacramento Valley Basin

Click to view Figure 4.9-4

Click for Figure 4.9-4 Sacramento Valley Basin

Surface Water Conditions

 

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