Assessment of water resources deficit index based on population of urban and rural settlements and effects of climate change-Case study of Bardsir city

Iran is considered as one of the world’s lesser sources of water resource and in order to optimize the use of available water resources, recognizing these resources is inevitable. To simulate water resources at a widespread level, it is essential to use a comprehensive model that is capable of simulating large-scale models, one of which is the SWAT model. Also, the availability of water resources should be investigated in light of climate change which in this research the climate change bundle is used to study climate change. The base period for this study is from 1992-2016 and the era from 2020-2050. The results indicates that an increase in precipitation in the southwest and a 5% decrease in rainfall in the eastern part of the city. As well there is the possibility of an average temperature rise of up to 3 degree Celsius. Accessible water resources in the city of Bardsir include blue and green water that the amount of blue water in the middle regions is higher than that of other parts and the western parts will have higher evapotranspiration. In addition, the soil moisture content in the southern part will be higher than in the other areas. Therefore, it is unavoidable to heed these areas in order to devise grandiose plans for the dry farming.