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<br />28
<br />
<br />Estimated historical total water supply
<br />
<br />,
<br />
<br />. The total water supply includes water diverted for direct irrigation,
<br />water released from storage reservoirs and groundwater pumped.
<br />
<br />The followiny table shows the estimated average monthly and annual
<br />total water for the IS-year period
<br />
<br />Max.
<br />Min.
<br />Ave.
<br />
<br />Apr
<br />1,500
<br />o
<br />480
<br />
<br />May
<br />7,200
<br />1,000
<br />3,807
<br />
<br />Jun
<br />10,200
<br />3,500
<br />(,,653
<br />
<br />Jul
<br />10,900
<br />5,600
<br />8,16iJ
<br />
<br />"ug
<br />10,300
<br />6,000
<br />8,060
<br />
<br />Sep
<br />7,100
<br />3,700
<br />5,700
<br />
<br />Oct
<br />5,500
<br />1,000
<br />3,060
<br />
<br />Year
<br />42,100
<br />28,900
<br />35,930
<br />
<br />By eliminating the 3 high and the 3 low years the 9 remalnlng years
<br />had a total supply ranging from 33,100 to 39,900. At least 60 percent of
<br />the time the total water supply has been relatively stable.
<br />
<br />Estimated historical sUIQlus or
<br />phoriEge at the canal headqate
<br />
<br />"
<br />
<br />The following table shows the surplus or shortage of the total water
<br />supply (surface plus groundwater) when the supply is compared with the
<br />requirements at the canal headgate.
<br />
<br />-,
<br />
<br /> Apr May Jun Jul Aug Sep Oct Year
<br />Max. 1,200 3,000 1,200 1,000 3,600 2,800 2,700 5,600
<br />Min. -2,400 -1,400 -3,600 -4,500 -3,400 -2,100 -1,200 -11,100
<br />Ave. 587 667 -1,,053 ,-1,367 233 560 773 - 1,240
<br />(The minus sign (- ) indk~tes a shortage)
<br />
<br />During 60 percent of the time, or 9 years out of the 15-year period,
<br />the range was from a shortage of 2,900 to a surplus of 1,000 acre-feet.
<br />
<br />The following.table shows the yearly comparison of the water supply,
<br />the water requirements and the excess or shortage for each of the 15 years.
<br />
<br />The table indicates the amount of surplus or shortage is influenced
<br />more by the water requirements than by the supply.
<br />
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