Assessment of groundwater vulnerability in Walawe River basin, Sri Lanka

Priyantha Ranjan, Ashim Das Gupta, So Kazama, Masaki Sawamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the present study, DRASTIC model has been used as a feasible methodology to assess the groundwater vulnerability in the Walawe river basin, Sri Lanka. The main objective of the study is to assess the potential level of groundwater vulnerability for pollution and to compare the areas with land use activities representing the degree of usage of fertilizers in agriculture. The Geographical Information Systems (GIS) has been used to develop vulnerability maps, showing the relative vulnerability of the area. The results concluded that the upper part of the basin shows very low vulnerability and the lower part shows higher vulnerability for groundwater pollution. The ground water vulnerability maps are compared with the agricultural land use pattern of the area and it is noticed that the areas with intense agricultural activities, overlapped with the areas with high DRASTIC index values. In the area with higher DRASTIC index and with intense agricultural activities including the extensive usage of fertilizers and pesticides, more attention should be focused to establish monitoring network for adequate groundwater quality control and to reduce the anthropogenic stress on groundwater resources.

Original languageEnglish
Title of host publication31st IAHR Congress 2005
Subtitle of host publicationWater Engineering for the Future, Choices and Challenges
EditorsJun Byong-Ho, Il Lee Sang, Seo Il Won, Choi Gye-Woon
PublisherKorea Water Resources Association
Pages4387-4394
Number of pages8
ISBN (Electronic)8987898245, 9788987898247
Publication statusPublished - 2005
Event31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges - Seoul, Korea, Republic of
Duration: 2005 Sep 112005 Sep 16

Publication series

Name31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges

Conference

Conference31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges
CountryKorea, Republic of
CitySeoul
Period05/9/1105/9/16

Keywords

  • DRASTIC
  • Groundwater pollution
  • Land use
  • Vulnerability

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Environmental Science (miscellaneous)
  • Water Science and Technology

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