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Alireza Karbasi; Toktam Mohtashami; Amin Alizadeh; Zahra Moghimi
Abstract
Agriculture in arid and semiarid areas is dependent on groundwater extraction. Utilization of groundwater resources in Zaveh-Torbath Haydarieh plain is more than the aquifer's renewable potential, therefore, these resources have a reservoir deficit. To this end, in this study, using the information obtained ...
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Agriculture in arid and semiarid areas is dependent on groundwater extraction. Utilization of groundwater resources in Zaveh-Torbath Haydarieh plain is more than the aquifer's renewable potential, therefore, these resources have a reservoir deficit. To this end, in this study, using the information obtained from interviews with farmers in this plain, who were selected through cluster sampling in the year 2015-2016, and the use of the Tobit Model and the two-stage method of Hackman, factors influencing the extraction of groundwater resources were studied. The results of the two-stage Hackman model showed that, in the first stage, the explanatory variables including the dominant cultivation and personal and share ownership of water wells had a positive final effect of 0.35, 0.43 and 0.41, respectively, while variables of well depth, type of water transfer channel, and low yielding crops had a negative effect on overdraft of groundwater resources. In the second stage, the results showed that farm-to-well distance, farmer's annual income, and type of the dominant cultivation had a positive and significant effect at 5 percent on overdraft. Accordingly, paying more attention to the technical factors effective in water management, as well as raising farmers' awareness of their participation in improving cropping pattern, is an effective step in reducing overdraft of groundwater resources.