Chapter 20

Sintacs Method for Assessment of Groundwater Vulnerability: A Case of Ahmedabad, India

Mona Khakhar

Mona Khakhar

CEPT University, Ahmedabad, India

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Jayesh P. Ruparelia

Jayesh P. Ruparelia

Nirma University, Ahmedabad, India

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Anjana Vyas

Anjana Vyas

CEPT University, Ahmedabad, India

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First published: 18 June 2021

Summary

This research aims to derive the intrinsic vulnerability of groundwater using the GIS platform. The study compares the two models–DRASTIC and SINTACS to derive the intrinsic groundwater vulnerability. The first part of the research aims to derive the SINTACS model's appropriateness to find the study area's intrinsic groundwater vulnerability. The statistical result showed that both DRASTIC and SINTACS methods showed comparable results and can be successfully used for the alluvium aquifer system. The second part of the research assesses the temporal variation of intrinsic groundwater vulnerability for the years 2000 and 2012 and the existence of contaminants exceeding the prescribed limits concerning land use in the year 2012 for the study area using the SINTACS method. The temporal intrinsic vulnerability results indicated that the expanse of the vulnerability index range had increased towards the higher side. The study area's land use data were derived using the satellite image for the years 2000 and 2012. It was observed that urban, industrial, and agricultural land uses made the most impact on groundwater vulnerability. The degree of vulnerability under the ‘extremely high' class has increased from 3% in the year 2000 to 15% in 2012, clearly indicating groundwater's increasing vulnerability.

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