Flood Spatial Location Detection by Combining AHP and Fuzzy Models Using WLC Method in GIS (Case Study: Khorramabad Watershed)

Document Type : Research Article

Authors

1 Associate Professor, Faculty of New Sciences and Technologies, University of Tehran, Iran

2 Assistant Professor, Department of Water Engineering, Lorestan University, Iran

3 MSc in Watershed Management, Faculty of Agriculture and Natural Resources, Lorestan University, Iran

4 PhD Student in Watershed Management, Lorestan University, Iran

5 PhD Student in Watershed Science and Engineering, Faculty of Natural Resources and Earth Sciences, University of Kashan

Abstract

Locating suitable areas for constructing flood and water infiltration in underground trips with the purpose of storing runoffs and increasing groundwater reserves for providing required water for various purposes and also, the control of damages caused by floods, shows the importance and high necessity of these studies in order to protect natural and human resources. In this study, it has been attempted to provide appropriate locations for the flood distribution in Khorramabad watershed. For this purpose parameters such as land use, altitude, drainage density, geology, distance from residential areas, distance from river, distance from road, slope, soil categories, soil texture, electrical conductivity and unsaturated thickness was prepared and examined in the environment of ArcGIS 10.5. At first, the parameters were analyzed using fuzzy method between zero and one and then using the Expert Choice hierarchical analysis of paired comparison of variables were classified as quantitative classification and then using software based on analytic hierarchy process, the weight of each criterion was obtained. The most effective criteria in this study were the parameters of distance from residential areas, land use and unsaturated thickness. Finally, using ArcGIS10.5 the techniques and combined with linear-weighted combination, the location for flood propagation was determined. The results showed that according to the final map of flood spreading, 13.99% of Khorramabad watershed, appropriate desirability and 26.04% of the average desirability for constructing the constructs with the aim of spreading floods. These areas can be considered in planning the necessary actions to broadcast floods in this area.

Keywords


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Volume 7, Issue 1
April 2020
Pages 251-261
  • Receive Date: 06 November 2019
  • Revise Date: 09 March 2020
  • Accept Date: 09 March 2020
  • First Publish Date: 20 March 2020