Determination of Effective Factors Share on Groundwater Overdraft (Case Study: Marvdasht District)

Water deficit is one of the main factors limiting the development of economic activities. One of the main problems in the field of water resources is the poor management and excessive use of these resources. Unauthorized withdrawals of groundwater resources and disproportionate cultivation of crops with environmental conditions have been lead to inefficient allocation and waste of water resources without considering the high cost of dams’ construction and pumping systems. In the current study، Logit model was used for the determination of effective factors on groundwater resources overdraft. So، 290 questionnaires from 12 villages of Marvdasht district that used well for agricultural activities were filled. Study results showed that income level and water canal type has positive effect and exploitation license of groundwater resources، sub-vector efficiency، water return، participation in educational classes، farm distance to water resource and education level، respectively has negative and significant effect on groundwater overdraft. Implementation of support policies such as making appropriate facilities for canals equipment and irrigation systems suitable to topographic conditions in order to farm efficiency improvement and impose fines for unauthorized wells as a way to reduce overdraft in the region is suggested.