Estimation of Water Stress Multivariable Index (Case Study: Kashan City)

The issue of water scarcity or the limited availability of water resources, including concepts such as water stress, water shortage, and water crisis, is investigated in this study.Water stress refers to problems related to access to freshwater resources, particularly due to the excessive withdrawal of surface and groundwater.A water crisis describes a situation where the available clean and safe drinking water in a specific region is insufficient to meet demand.Factors like drought, reduced rainfall, and pollution can exacerbate water stress.Water shortage arises from reasons such as the inability to meet demand, economic competition over water quality and quantity, conflicts among users, the irreversible depletion of groundwater resources, and negative environmental impacts.This study provides an index to assess water stress for spatial analysis in the study area and analyzes relevant data by collecting information from various sources.This index utilizes both static and dynamic parameters to estimate drought and better depict water stress conditions.Static parameters include land use, slope, and soil type.Dynamic parameters include precipitation, temperature, and groundwater level.Kashan County was selected as the case study due to the continuous reduction in water resources.The results showed that in the water years 2005, 2014, 2020, and 2021, Kashan experienced the highest level of water stress, while in the water years 2002, 2004, 2010, 2012, 2013, and 2015, it experienced the lowest level of water stress.