Optimisation of deficit-irrigation under variable seasonal rainfall and planning scenarios for rice in a semi-arid region of Iran Online publication date: Tue, 27-Sep-2016
by Mohammad Javad Amiri; Hossein Hamidifar; Mehdi Bahrami; Saeid Eslamian
International Journal of Hydrology Science and Technology (IJHST), Vol. 6, No. 4, 2016
Abstract: The objective of this paper was to conduct economic analysis for optimum seasonal irrigation water application by considering seasonal rainfall under water (ww) and land limitation (wl) for rice in Isfahan province. The results showed that the values of ww and wl for different years decreased as the seasonal rainfall increased. The greatest applied water reduction occurred at water limiting condition with 50%-84% for 0-0.25 m seasonal rainfall. The greatest income per unit applied water occurred for water limiting condition and it increased from 41%-46% for 0-0.25 m seasonal rainfall, with respect to maximum yield condition. In water limiting condition, with decreased water consumption, the cultivated land increased from 1-5.2 times. In order to attain more net profit, values of ww and wl with a given amount of rainfall decreased with increasing the water price.
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