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Zoning the Karest evolution using AHP and ANP models
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Fatemeh Saki *1   , Mahtab Saki , Iman Belvasi |
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Abstract: (21 Views) |
Aleshter catchment area with a surface area of 803 square kilometer is located in the north of the Lorestan province at Aleshter city. Most of it is located in the folded Zagros and height Zagros, and most of its ranges are made of hard carbonate constituent. This area of karsti zone has an important role in provision and feeding of the aquifers. Therefore, in order to identifying this areas and the extent of their evolution, we are tried to zoning this karset evolution and preparing its map. In order to achieve these objectives, primarily the karst forms and shapes were produced from topographic maps 150000 items of Armed Forces Geographical Organization and images of ETM meter of Landsat 8 and then produced satellite maps images were processed using ENV14.8 software package (Fig. 2). In order to perform zoning, eight factors of temperature, precipitation, humidity, slope, steeps directions, geology, lithology, vegetation (land use) were selected as influential factors in the evolution of karst. For weighting the factors maps layers, AHP and ANP models have been used. Finally, weighted overlap of influential factors were performed in the ARCGIS environment, and karset zoning map was prepared by two mentioned methods. For evaluation and classification of output results of used models in estimation of Karset zones, kappa statistic coefficient was used. The results shown that mesh analyzing model with kappa efficient of 0.90 is more efficient method than hierarchical analysis model in preparing karset evolution maps of the Aleshter catchment area.
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| Keywords: Karset, Aleshter catchment area, zoning, ANP, AHP, Arc Gis. |
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Full-Text [PDF 1259 kb]
(8 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2019/07/4 | Accepted: 2020/02/24 | Published: 2020/03/17
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