Impacts of Land Use and Climate Variability on Groundwater Storage in the Cauvery River Basin Using GRACE and Empirical Orthogonal Function Analysis

DOI

10.2991/978-94-6463-936-0_4How to use a DOI?

Keywords

EOF analysis; Giovanni; GRACE; TWSA

Abstract

Groundwater storage (GWS) within the Cauvery River Basin is facing increasing stress due to the combined effects of climate variability and land use/land cover (LULC) changes. This study provides a comprehensive assessment of the spatial and temporal variations in GWS and examines the influence of LULC and climatic factors using data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, supplemented by Empirical Orthogonal Function (EOF) analysis and Spearman correlation. GRACE-derived terrestrial water storage anomalies (TWSA) were utilized to estimate GWS variations, while EOF analysis was employed to extract the dominant spatial and temporal patterns of groundwater fluctuations, LULC changes, and precipitation variability. The analysis identified distinct seasonal and interannual GWS variations, which are primarily influenced by monsoonal rainfall patterns and increasing anthropogenic groundwater extraction. While the study observed a statistical link between certain precipitation modes and groundwater dynamics, the correlations between dominant LULC patterns and GWS were found to be more consistently significant and of greater magnitude. These findings indicate that rapid urbanization and agricultural expansion are more robustly associated with groundwater stress in the basin compared to the measured climatic variability. The results underscore the critical need for sustainable water resource management strategies that specifically address the landscape changes driven by human activities to mitigate the adverse effects on groundwater availability in the Cauvery River Basin.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - M. S. Sugni
AU  - U. Anu Krishnan
AU  - Bhavya G. Nair
PY  - 2025
DA  - 2025/12/29
TI  - Impacts of Land Use and Climate Variability on Groundwater Storage in the Cauvery River Basin Using GRACE and Empirical Orthogonal Function Analysis
BT  - Proceedings of the International Conference on Civil Engineering and Architecture for Sustainable Infrastructure Development and Environment (CEASIDE 2025)
PB  - Atlantis Press
SP  - 38
EP  - 58
SN  - 3005-155X
UR  - https://doi.org/10.2991/978-94-6463-936-0_4
DO  - 10.2991/978-94-6463-936-0_4
ID  - Sugni2025
ER  -