Spatial Mapping of Northeast Bijar Plain Aquifer Quality Index and Comparison of Water Quality Using Different Methods

Document Type : Research Article

Authors

1 Associate Professor, Faculty of Natural Sciences, University of Tabriz

2 Master of Science of Hydrogeology, Faculty of Natural Sciences, University of Tabriz

3 PhD Student in Hydrogeology, Faculty of Natural Sciences, University of Tabriz

Abstract

Considering the quality of drinking water has an important role in human health, so the quality of aquifers as the main source of drinking water supply should be analyzed. The purpose of this study is to investigate the quality of groundwater used for drinking in the northeast of Bijar plain with GQI index using ArcGIS software. Study area of Bijar plain aquifer is one of the aquifers in the Kurdistan province that provides a drinking water source in a part of Bijar city and more than 12 villages. Drinking water quality index used four methods GQI, GQI-GA, GQI-FL-GA and GQI-FG was prepared for this aquifer and then in order to validate and compare the results of the four methods of correlation coefficient (r) and root mean square Error (RMSE) were used. Based on the obtained results, GQI-FL-GA method with correlation coefficient of 0.89 and RMSE 0.01 showed the best results and GQI-FG method with correlation coefficient of 0.86 and RMSE 0.11 presented the weakest results. According to the water quality index method, 91.2 percent of the plain has suiteble good quality and the remaining 8.8 percent of the region, which is mostly the northeastern parts (plain output) has acceptable quality.

Keywords


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Volume 8, Issue 1
April 2021
Pages 235-247
  • Receive Date: 24 November 2020
  • Revise Date: 23 February 2021
  • Accept Date: 23 February 2021
  • First Publish Date: 08 March 2021