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      Use of geographic information systems for assessing groundwater pollution potential by pesticides in Central Thailand.

      1 ,
      Environment international
      Elsevier BV

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          Abstract

          This study employed geographic information systems (GIS) technology to evaluate the vulnerability of groundwater to pesticide pollution in Thailand. The study area included three provinces, Kanchana Buri, Ratcha Buri, and Suphan Buri, located in west-central Thailand. Factors used for the vulnerability assessment included soil texture, slope, land use, well depth, and rainfall. These vulnerability factors were reclassified to a common scale, and a weighted average was computed to yield a vulnerability score. Vulnerability factors and weights were assigned considering pesticide concentrations in 90 wells throughout the study area. Well depth was the most significant vulnerability factor. Groundwater vulnerability maps were generated for several pesticides. The eastern, agricultural part of the study area has relatively deep wells and fine soils. Shallow wells are present in the mountainous west; however, fewer pesticides are applied in that region. Consequently, much of the study area had a medium groundwater vulnerability rating, although there were pockets of high vulnerability, for example, in agricultural areas with shallow wells. The groundwater vulnerability maps are effective for identifying locations warranting more detailed groundwater pollution and vulnerability investigations.

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          Author and article information

          Journal
          Environ Int
          Environment international
          Elsevier BV
          0160-4120
          0160-4120
          Apr 2003
          : 29
          : 1
          Affiliations
          [1 ] Department of Geography and Environmental Science Program, University of North Texas, PO Box 305279, Denton, TX 76203-5279, USA.
          Article
          S0160-4120(02)00149-6
          10.1016/S0160-4120(02)00149-6
          12605941
          bc06e203-ebb2-4937-ac49-830fcbf1f322
          History

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