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COST ANALYSIS AND WATER CONSERVATION POTENTIAL OF IRRIGATION
                         TECHNOLOGIES IN THE TEXAS PANHANDLE WATER PLANNING AREA




               Table 7.  Water savings when shifting from conventional irrigation
               method to more efficient irrigation technologies using indexed water use
               approach, Region A.
               System           CF       SF     MESA     LESA     LEPA        SDI
                              -----------------------------------$/acre-----------------------------------
               Investment Cost  212.35   235.47   348.63   372.22   378.88   837.68
                              -----------------------------------acre-feet--------------------------------
               CF                   0    96,820  111,477  159,110  184,759    192,087
               SF                            0        0        0        0           0
               MESA                                   0    3,434     5,897      6,600
               LESA                                            0    60,520     77,378
               LEPA                                                     0         469
               DRIP                                                                 0
               Annual Water
               Savings                   96,820  111,477  162,544  251,176    276,534
               Water Savings
               for 50 years           4,841,000 5,573,850 8,127,200 12,558,800  13,826,700
               Water Savings
                         1
               (%) of Base                   7        8       11       18          19
               1
                 Base irrigation water demand for 50 years in Region A is 71,499,450
               acre-feet.
               Table 8.  Water savings when shifting from conventional irrigation
               method to more efficient irrigation technologies using equal water use
               approach, Region A.
               System                  F     SF     MESA     LESA    LEPA      SDI
                                       ----------------------------------$/acre---------------------------------
               Investment Cost       212.35  235.47  348.63  372.22  378.88   837.68
                                      ---------------------------------acre-feet-------------------------------
               CF                        0  105,104  121,274  168,024  192,913  201,125
               SF                                0       0        0        0        0
               MESA                                      0     3,434   5,897     6,600
               LESA                                               0   60,520    77,378
               LEPA                                                        0      469
               DRIP                                                                 0
               Annual Water Savings         105,104  121,274  171,458  259,330  285,572
               Water Savings for 50 years   5,255,210 6,063,704 8,572,886 12,966,489 14,278,616
               Water Savings (%) of Base 1       7       8       12       18       20
               1
                 Base irrigation water demand for 50 years in Region A is 71,499,450
               acre-feet.

               Manuscript received:  12 January 2012

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