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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />estimated to be approximately 218,000 acre-feet. This difference represents approximately <br />9,000 acre-feet increase using the Walsh weather data for 1999 and can be attributed to Walsh <br />being approximately 600 foot lower in elevation than Springfield. <br /> <br />The approximate number of hours that wells would need to be operated based upon meeting <br />the peak monthly demand and the seasonal demand for the main irrigated crops (corn and <br />wheat) has been determined and are presented in Table 5-5 and Table 5-6. The purpose for <br />presenting this information is to assist water users in determining their actual pumpage. The <br />higher the output capacity of the well the less amount of time required to meet the gross <br />irrigation requirement. The peak month and seasonal demand for corn and wheat are shown in <br />Tables 5-5 and 5-6, respectively. For example, a 600-gpm well would need to be operated <br />approximately 2,170 hours to meet the needs of a 122-acre center-pivot with corn. Similarly, a <br />center-pivot irrigating wheat would need to be operated approximately 1,170 hours to meet the <br />seasonal water requirements. <br /> <br />V-3 <br />