Evaluation of Groundwater Potential of Sufi Chay basin Using Frequency Ratio models and GIS

Document Type : پژوهشی

Authors

1 Department of Reclamation of Arid and Mountainous Regions - Natural Resources Faculty- Agricultural Faculty - University of Tehran

2 Faculty Member / University of Tehran

3 Water Hydraulics Expert - Abkhan Consultant Engineers

Abstract

The management of groundwater resources is a major for identifying areas with high potentials for groundwater. In this study, we tried to identify areas with the potentials for groundwater in Sufi chay Watershed by using frequency ratio model. Conditioning Factors used in this study include: elevation, slope, drainage density, landuse, Lithology, Soil, Faults and Topography. In the frequency ratio, at first wells with a discharge rate of above 11 liter per second were extracted in the region; then, 70 percent Training wells (6981 pcs) and 30% of the wells for validation (2992 pcs) were randomly selected. Based on the frequency ratio, necessary analyses were conducted in classes and maps and maps were overlapped. Finally, the groundwater resources map for model were produced. ROC curve method was used to evaluate the performance of model. Based on this, the percentage of the area achieved in the Frequency model ratio are as follows 63% of the areas were low; 18% Average; 12% high, and 7% Very high.

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History

  • Receive Date: 16 October 2018
  • Revise Date: 13 June 2020
  • Accept Date: 24 February 2020

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