基于地理信息系统的 MCDM 方法用于绘制埃塞俄比亚中部 Gojjam 东部地区的滑坡灾害分区图

IF 2.9 Q2 GEOGRAPHY, PHYSICAL
Chalachew Tesfa, Demeke Sewnet
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引用次数: 0

摘要

滑坡在埃塞俄比亚高原地区非常普遍,尤其是在受滑坡问题影响严重的东戈贾姆地区。本研究在埃塞俄比亚西北部的东戈贾姆区进行。研究区域是该国经济重要地区的一部分,也是埃塞俄比亚文艺复兴大坝(GERD)的主要水源。这项工作的主要目的是详细清查过去的滑坡地点,预测现在和未来的滑坡危害,并利用分析层次过程(AHP)和地理信息系统(GIS)技术绘制东戈贾姆地区的滑坡分区图。本研究使用的参数包括坡度、坡面、土地利用和土地覆盖、道路距离、降雨量、岩性、海拔高度和河流距离。从实地收集了各种成因参数,并对专题地图进行了适当修改。最后,以各种参数的评级为基础,在地理信息系统窗口中绘制出 LHZ 地图。在地理信息系统环境中绘制了滑坡易发性和清单图。研究结果表明,该地区滑坡危害的主要驱动因素是河流邻近性、降雨和人为活动。对该 "高危险区 "地图的验证表明,过去 80% 以上的滑坡都与 "高危险区 "相匹配,并合理地认可了所采用方法的合理性。所考虑的参数及其对 LHZ 地图制作的评估均得到了确认。所绘制的滑坡清查图对于城市规划者、农业研究、环境学家以及未来的滑坡危险预防和缓解战略都非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GIS-based MCDM approach for landslide hazard zonation mapping in east Gojjam zone, central Ethiopia

Landslides are prevalent in the Ethiopian highlands, particularly in the east Gojjam zone, which is highly affected by landslide problems. This research was carried out in the east Gojjam zone, northwestern Ethiopia. The study area is part of an economically important area in the country, and it is the main source of water for the Grand Ethiopian Renaissance Dam (GERD). The main objective of this work was to undertake a detailed inventory of past landslide locations and prediction of present and future landslide hazards, as well as the preparation of a landslide zonation map in the East Gojjam zone by using the Analytical Hierarchy Process (AHP) with the GIS technique. The parameters used for this study were slope degree, slope aspect, land use and land cover, road proximity, rainfall, lithology, altitude, and river proximity. The various causative parameters were collected from the field, and suitable modifications were made to the thematic maps. Finally, the ratings for various parameters were used as the basis to prepare the LHZ map in GIS windows. The landslide susceptibility and inventory mapping were produced in the GIS environment. The results of the study show that the main driving factors for the landslide hazards in the area were river proximity, rainfall, and manmade activities. Validation of this LHZ map revealed that more than 80% of past landslides match within the "high hazard zone" and reasonably accepted the rationality of the adopted methodology. The considered parameters, as well as their evaluation of the production of LHZ-Map, were confirmed. The produced landslide inventory map is very important for urban planners, agricultural studies, environmentalists, and future landslide hazardous prevention and mitigation strategies.

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来源期刊
Quaternary Science Advances
Quaternary Science Advances Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.00
自引率
13.30%
发文量
16
审稿时长
61 days
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