Feasibility of pressurized irrigation based on water quality indices (Case study: Marvdasht-Kharameh study area)

Feasibility of pressurized irrigation systems, based on the chemical properties of the water, at sub-regional and regional scale, It is especially important for its implementation. In this study, GIS has used for zoning of Marvdasht-Kharameh land suitability for executing pressurized irrigation systems based on indices irrigation water quality. In this study, the data of 50 wells water measured in 2014-2015 has used. The zoning map based on the HCO3 index showed that most of the region has a low to moderate limitation for performing sprinkler irrigation system. In addition, the zoning maps Cl and Na parameters in the Marvdasht-Kharameh study area showed that 84.6% and 78.2% Of land area respectively, are faced limitation for performing sprinkler irrigation systems. The results showed that in 60.2% and 27.3% of the area, there is a serious limitation and a low to moderate limitation for performing drip irrigation based on TDS and EC parameters, respectively. Throughout the study area, there was a limit to the pH index for implementing the drip irrigation method; which there have 90.4% and 9.6% of the land subject has a low to moderate limitation and serious limitation on pH index for performing drip irrigation system, respectively. The results showed that for the majority of the area, there is no limitation on LSI index for performing drip irrigation system because of Acidity of groundwater in the area.