Monitoring and Evaluation of 2015 Devrek Zonguldak Landslide within the scope of Flood Risk Assessment by Landsat-8 Satellite Data

Şerife Pınar Güvel, Mehmet Ali Akgül, Mehveş Feyza Akkoyunlu
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Abstract

The mass movement towards stream beds and their accumulation there may cause flood events as a result of landslide events. In this study, Devrek Landslide, which occurred in 2015, was investigated by using a remote sensing technique. The Çomaklar stream is located at the lower elevations of this landslide region. Çomaklar stream and surrounding settlements are at risk of flooding due to the probability of preventing the water flow in the stream because of the effects of the landslide. Devrek district is located in Zonguldak in the northern part of Turkey. LANDSAT-8 satellite images between the dates 27 January 2015 and 22 July 2015 were used to investigate the location and size of the Devrek district landslide. Satellite-derived remote sensing data have been widely used in recent years to monitor changes on the earth's surface and to provide information. In this study, the Spectral Angle Difference method was used to compare the images before and after the landslide event. A change detection analysis was conducted between pre-landslide and post-landslide images to investigate the area affected by the disaster. As a result, the landslide was determined as 1050 meters in length and 110 meters in width, and the landslide area was calculated as 10.87 ha.
基于Landsat-8卫星数据的2015年洪水风险评估范围内Devrek Zonguldak滑坡监测与评价
山体滑坡事件可能导致山体向河床移动并在河床上堆积,从而引发洪水事件。本研究利用遥感技术对2015年发生的Devrek滑坡进行了调查。Çomaklar河流位于该滑坡区的低海拔地区。Çomaklar由于山体滑坡的影响,溪流中的水流有可能被阻止,因此溪流和周围的定居点面临洪水的危险。Devrek区位于土耳其北部的Zonguldak。2015年1月27日至2015年7月22日之间的LANDSAT-8卫星图像被用于调查Devrek地区滑坡的位置和规模。近年来,卫星遥感数据已被广泛用于监测地球表面的变化和提供信息。本研究采用光谱角差法对滑坡事件前后的影像进行对比。对滑坡前和滑坡后的图像进行变化检测分析,调查受灾地区。据此确定滑坡长度为1050米,宽度为110米,滑坡面积为10.87 ha。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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