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March 23, 2026Integrated Environmental Assessment and Management

A Geographic Information System-Based Framework for Discriminating Point and Non-Point Source Pollution in Data-Limited River Basins: A Case Study from Sri Lanka's Kelani River

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Authors

MKMeddage Anjana Kelum Mithurangana Madhura KumaraGLGuwani LiyanageFIFathima Sumaiya Idroos

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Overview

This framework identifies pollution sources and assesses water quality in Sri Lanka's Kelani River Basin, highlighting urban growth's impact.

Key Points

  • To develop a GIS-based framework for distinguishing between point and non-point source pollution in data-limited river basins.
  • Collected 71 surface and groundwater samples across various river zones in different seasons.
  • Analyzed key physicochemical and biological parameters.
  • Calculated the CCME-WQI based on water quality guidelines.
  • Overall water quality classified as 'Marginal', with a clear degradation from 'Excellent' to 'Poor'.
  • Identified ammonium nitrogen and total phosphorus as primary pollution drivers.
  • Demonstrated overwhelming point-source discharges and seasonal nutrient mobilization.

Cite This Study

Kumara et al. (2026) studied this question.

synapsesocial.com/papers/69c08bb5a48f6b84677f95ebhttps://doi.org/10.1093/inteam/vjag045
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