6.8.3 Costs of Each Irrigation Technology (Per Ha) Water Requirements Water Price (ECV) Equipment Water Price & Equip
Cost Comparison among Irrigation Technologies: Cost c omparison a mong t he i rrigation technologies w as made ba sed on t he w ater r equirements derived from the experiment. The costs of each irrigation technology were calculated on the water prices and the equipment costs which varied with the irrigation technologies. The water prices set by São Domingos County were used, namely 25 ECV/m3 and 15 ECV/m3 for the t raditional irrigation and the w ater s aving i rrigation respectively. F or the w ater s aving irrigation, the price was set low for its promotion with the government subsidy. The drip irrigation equipment which was durable for 3 years cost 500,000 ECV/ha. One pot for pitcher irrigation cost 500 ECV and its total cost came to 1,500,000 ECV, as 3,000 pots/ha were needed. The pots were durable for 3 years as well. The result of the calculation are shown in the following table. Table 6.8.3 Costs of Each Irrigation Technology (per ha) Water Requirements Water Price (ECV) Equipment Water Price & Equip. Cost Irrigation System day 270 days/year m3 year Cost (ECV) 3 years (ECV) year (ECV) Traditional without mulch 55 m3/day 14,850 m3/year 25 371,250 - 1,113,750 371,250 Drip without mulch 32 m3/day 8,640 m3/year 15 129,600 500,000 888,800 296,267 Drip with mulch 26 m3/day 7,020 m3/year 15 105,300 500,000 815,900 271,967 Pitcher without mulch 35 m3/day 9,450 m3/year 15 141,750 1,500,000 1,925,250 641,750 3 3 Pitcher with mulch 30 m /day 8,100 m /year 15 121,500 1,500,000 1,864,500 621,500 As a r esult, t he an nual t otal co sts o f t he w ater price and equipment co st of each i rrigation technology are as follows; Traditional Irrigation without mulch: 371,250 ECV Drip Irrigation without mulch: 296,267 ECV Drip Irrigation with mulch: 271,967 ECV Pitcher Irrigation without mulch: 641,750 ECV Pitcher Irrigation with mulch: 621,500 ECV The c osts of d rip i rrigation w ith m ulch w ere t he c heapest, and the d ifference f rom t hose of traditional irrigation came to 99,283 ECV.
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