Hazard Assessment Of Groundwater Resources Degradation Using The Modified Iranian Model of Desrtification Potential Assessment In Fars Plains

Groundwater is an important source of water supply in arid and semi-arid regions. Optimal management of water resources and their conservation and improvement for quality and quantity need to have amount and distribution of water data in a defined geographical area. According to this issue, in this study we want to assess both qualitative and quantitative risk of groundwater resources using the modified IMDPA model and geographical information system (GIS) in plains of Fars province. The purpose of this study is to prepare a suitable zonation and vulnerability maps of qualitative and quantitative status of groundwater in order to determine the areas with higher risk. This is a basic and vital step in water resources management for priotorization of areas in order to prepare a combat plan against qualitative and quantitative degradation of groundwater. To prepare Zonation maps of qualitative and quantitative status of groundwater, spherical ordinary kriging method was used. The required data of this study is related to precise data recording of Fars Regional Water Company. The results of this study indicate that the Lowering of Water Table (quantitative status) in 81% of Fars plains is at severe and very severe hazard classes. The quality status of about 58% of Fars province plains is at severe and very severe hazard classes. Overall, more than 83% of Fars province plains are in state of severe and very severe hazard classes of ground water condition. Severe and very severe hazard classes were observed in many parts of the province especially in central and southern regions, the moderate and slight hazard classes were observed mainly in the northeastern parts of the province.