Assessment of regional irrigation requirements considering water scarcity: application to Stornara and Tara Consortium
2002
Vinterfeld, S.
The effects of water scarcity and drought are particularly severe on irrigated agriculture. This work aims both at assessing regional irrigation requirements under water scarcity conditions through the estimate of crop water requirements for characteristic years of average, high and very high water demand, and at evaluating different water saving strategies based on deficit irrigation. The irrigation scheduling simulation model ISAREG was used to simulate deficit irrigation strategies. The results of simulation are integrated by using a GIS for the irrigation consortium Stornara e Tara (Southern Italy) on an agricultural surface area. The overall results demonstrated that the strategy based on a fixed MAD, with irrigation starting at 30 percent below optimal yield threshold, provided very satisfactory results allowing an average water saving of more than 25 percent with 10 percent yield reduction.By applying this strategy at hhe regional scale it is possible to save 96-97 Mmü of water.
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