Assessment of groundwater vulnerability using the GIS approach-based GOD method in Surat district of Gujarat state, India

Abstract

The quality and quantity of groundwater may differ from area to area so groundwater is a very important source of water worldwide. The aim of the study is to assess groundwater vulnerability in terms of quality using the GOD method using the GIS approach for Surat and its surroundings. Groundwater confinement, overlaying strata and depth to the water table are the three parameters that are used in the assessment of groundwater vulnerability. The lithological properties of the unsaturated zone are given significance by this method in the subdivision of areas with various levels of susceptibility, as shown by the GOD index map. Based on this, the study area lies in the high and very highly vulnerable areas. Based on the study Mahuva, Mandvi, Umarpada and some parts of the Bardoli talukas lie in a very high vulnerability zone, whereas another part of the study area lies in high vulnerability. Almost 35.98% area of the district lies in the higher vulnerability zone. It is observed that high vulnerability may be due to the availability of the agricultural area. This study may help in groundwater quality management and watershed management as well as it is very much useful for policymakers.

Application of the Weighted Arithmetic Water Quality Index in Assessing Groundwater Quality: A Case Study of the South Gujarat Region

“…To save time and effort, an artificial neural network (ANN) method has recently been used to estimate groundwater quality [30]. In the area of water quality modelling, ANNs have found a variety of uses [31] It gives data on groundwater quality and works as a consistent, precise unit of measurement [32]. Although WQI cannot be accurately expressed, as mentioned above, WQI can determine the water quality's final state without conducting an interpretation of each variable, which gives it an edge over other evaluation methods [33].…”