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Geo-physical hazards microzonation and suitable site selection through multicriteria analysis using geographical information system
Applied Geography ( IF 4.0 ) Pub Date : 2021-08-24 , DOI: 10.1016/j.apgeog.2021.102550
Adnanul Rehman 1, 2 , Jinxi Song 1, 2 , Fazlul Haq 3 , Muhammad Irfan Ahamad 1, 2 , Muhammad Sajid 4 , Zubda Zahid 1, 2
Affiliation  

Selecting new suitable settlement sites is challenging in areas of high tectonic activity and multiple geo-physical hazards. The present study was conducted in Muzaffarabad city, located in the active tectonic Himalayan region. The study is based on the integration of multi-criteria decision analysis (MCDA) with geographic information system (GIS) at local scale. Initially, six influencing factors/layers were considered inputs for geotechnical microzonation, distance from fault lines, distance from streams, soil bearing capacity, soil swelling potential, slope gradient, and elevation, whereas for suitable land availability analysis, existing land use was integrated with geotechnical microzonation map. The analytical hierarchy process (AHP) algorithm was used to assign the weight and rank values to layers and classes to avoid uncertainty. The weighted overlay method (WOM) was used to integrate the weighted layers and ranked classes. The study's findings reveal that more than half of the study area is unsuitable for settlements, medium suitable areas (39%), and only 10% of the area is classified as properly suitable. In a suitable land availability map, 64% of the land area was found to occupy by partial available (23%) and available land (10.6%), respectively. Concluded that most of the settled areas were found in the unsuitable zone were at significant risk.



中文翻译:

通过使用地理信息系统进行多标准分析的地球物理危害微区和合适的选址

在高构造活动和多种地球物理灾害的地区,选择新的合适的定居点具有挑战性。本研究在位于活动构造喜马拉雅地区的穆扎法拉巴德市进行。该研究基于多标准决策分析 (MCDA) 与本地规模的地理信息系统 (GIS) 的集成。最初,六个影响因素/层被认为是岩土微分区、距断层线的距离、距溪流的距离、土壤承载力、土壤膨胀潜力、坡度和高程的输入,而对于合适的土地可用性分析,现有土地利用与岩土微分区图。使用层次分析法 (AHP) 算法将权重和等级值分配给层和类,以避免不确定性。加权叠加法(WOM)用于整合加权层和排名类别。研究结果显示,超过一半的研究区域不适合定居点,中等适宜区域(39%),只有 10% 的区域被归类为适当适宜区域。在合适的可用土地地图中,发现 64% 的土地面积分别被部分可用 (23%) 和可用土地 (10.6%) 占据。得出的结论是,在不适宜区发现的大部分定居区都处于重大风险中。部分可用土地(23%)和可用土地(10.6%)分别占土地面积的64%。得出的结论是,在不适宜区发现的大部分定居区都处于重大风险中。部分可用土地(23%)和可用土地(10.6%)分别占土地面积的64%。得出的结论是,在不适宜区发现的大部分定居区都处于重大风险中。

更新日期:2021-08-24
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