Abstract
An algorithm to compute crop water requirements in the irrigation districts of Mexico is presented based on climatological data from where irrigation needs are obtained. The method relies on the soil water balance where the main inputs are rainfall and irrigation and the outputs are deep drainage or deep percolation, and crop evapotranspiration. The method to compute each variable of the soil water balance is outlined as well as irrigation needs. A computer program was utilized, DRIEGO1, from where crop’s water needs are deduced. The drought index and evapotranspiration data for the main irrigation districts of the country are presented in both graphical and tabular ways. According to the results it can be seen that the crop evapotranspiration is strongly dependent on the climatology showing significant difference for the same crop for different places.
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Sánchez-Cohen, I., Catalán-Valencia, E., Garatuza-Payán, J. (2016). Water Demand of Major Crops: A Methodology. In: Pérez-Espejo, R., Constantino-Toto, R., Dávila-Ibáñez, H. (eds) Water, Food and Welfare. SpringerBriefs in Environment, Security, Development and Peace, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-319-28824-6_13
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