Evaluation of Groundwater Qualitative Potential for Drinking Water Consumptions by AHP Model and GIS Technique (Case Study: Urmia Plain)

Document Type : Research Paper

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Abstract

Increasing population and demand for water resources caused to evaluation water quality and manage water resources unavoidable. In Urmia plain water quality and quantity is confronted with critical condition. The purpose of this research is to zone the groundwater quality in Urmia plain for potation consumptions by AHP model and GIS technique. To achieve these purposes, the data of 128 deep wells from 2011 to 2012 was used. In the beginning, raster maps of studied region were provided with different methods of interpolation. In attention to wells distribution in the plain the Kriging method was used to zone maps of Sodium, Chlorine, Sulfate, Total dissolved solids, total hardness and electrical conductivity. Based on Schuler diagram and using analytical hierarchy process, the most efficient weights for each hydro-chemical variables were selected. Finally with overlapping hydro-chemical layers and exerting definitive weights in geographic information system, groundwater qualitative potential map in the studied region for determining the suitable places for drinkingwater was provided. The results showed that among five defined potential region, 78.4% of studied region is in good up to acceptable range, 7.7% is in inappropriate range, 12.9% is in bad range and 1% is in potable in necessary times. Entirely, central, south, northeast and northwest parts of studied region have best quality of groundwater for drinking consumptions.

Keywords

Irrigation Sciences and Engineering
Volume 38, Issue 3 - Serial Number 3
December 2015
Pages 117-127

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History

  • Receive Date: 09 February 2014
  • Revise Date: 14 December 2015
  • Accept Date: 21 October 2014
  • Publish Date: 22 November 2015

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