Water and Energy International
SCOPUS
  • Year: 2025
  • Volume: 68r
  • Issue: 6

Spatio-Temporal Groundwater Quality Assessment in a Semi-Arid Upland Region of Andhra Pradesh: A Geospatial Interpolation Approach

  • Author:
  • T. Rambabu1, M. Lakshmi Sirisha2, P. Raghuram1, G. Suribabu1, L.V. Ravi Kumar3
  • Total Page Count: 10
  • Page Number: 15 to 24

1WET Research Centre, Department of Civil Engineering, SRKR Engineering College (A), Bhimavaram, West Godavari, Andhra Pradesh

2Department of Civil Engineering, SR Gudlavalleru Engineering College, Gudlavalleru, Krishna District, Andhra Pradesh

3Department of Chemistry, Smt. B. Seetha Polytechnic College, Vishnupur, West Godavari, Bhimavaram, Andhra Pradesh

Online published on 29 December, 2025.

Abstract

In upland areas, groundwater quality is vital for humans and livestock. Sustainable aquifer use relies on regular monitoring, mainly using water level data. This study used geostatistics and ArcGIS to predict spatial and seasonal changes in groundwater quality in West Godavari district. Thirty samples from thirty villages were collected in pre- and post-monsoon and tested for pH, EC, TDS, TH, Cl-, SO42-, Ca2+, Mg2+, TA, DO, and BOD. IDW interpolation in GIS was used for spatiotemporal analysis. The Water Quality Index (WQI) was calculated to assess potability. The pre-monsoon WQI was 47.91 (fit for drinking), while the post-monsoon WQI was 57.67 (poor quality). In pre-monsoon, 49.99% of samples and in post-monsoon, 66.66% of samples ranged from excellent to good. GIS mapping showed NW and SE areas were good in pre-monsoon and SW in post-monsoon. IDW revealed spatial water quality, while WQI confirmed groundwater suitability, aiding informed water use decisions.

Keywords

Upland, Groundwater, GIS, IDW, WQI