Volume 7, Issue 3 (11-2020)                   Journal of Spatial Analysis Environmental Hazards 2020, 7(3): 147-162 | Back to browse issues page

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Mojarad Z, jamalabadi J, Shafiei N, zanganeh asadi M َ, parak K. The zoning of the risk of mass movements using information valuation methods and surface density in the ghouchan- Shirvan watershed. Journal of Spatial Analysis Environmental Hazards 2020; 7 (3) :147-162
URL: http://jsaeh.khu.ac.ir/article-1-2853-en.html
The zoning of the risk of mass movements using information valuation methods and surface density in the ghouchan- Shirvan watershed
Zeinab Mojarad1 , Javad Jamalabadi 2, Najmeh Shafiei3 , Mohammad َAli Zanganeh asadi4 , Kobra Parak5
1- MA student in Geomorphology, Department of Hydrometeorology and Geomorphology, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran
2- PhD in Geomorphology, Department of Hydrometeorology and Geomorphology, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran. , javadjamalabadi@yahoo.com
3- ph.D student of Geomorphology, Department of Hydrometeorology and Geomorphology, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran.
4- Associate Professor in Geomorphology, Department of Hydrometeorology and Geomorphology, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran.
5- in Geomorphology, Department of Hydrometeorology Ma in and Geomorphology, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran.
Abstract:   (4269 Views)
Mass movements are among the morphodynamic phenomena that are affected by various factors at the level of the mountainous slopes. Massive movements and instability of the range are important hazards for human activities. Which often leads to the loss of economic resources and damage to property and facilities. These issues highlight the need for zoning the risk of mass movements as the first step in the proper environmental management of this phenomenon. In this research, we investigate the risk zone of mass movements using information estimation and surface density methods in the Watershed--ghochan-Shirvan Basin. For this purpose, at first, 12 important information layers affecting mass movements such as lithology, slope, elevation, rainfall, tide, erosion, climate, distance from the road, distance from fault, distance from the river, soil and land use, and digital They were. From the combination of operating maps with land surveys, the percentage of landslides in different units of each map was obtained. By calculating surface density, the information value of each factor was determined. Finally, a landslide risk zoning map was prepared by integrating different weight weights into two different information weighing models and a surface density model. The results of this study show that the southwestern part of the basin has the highest amount of landslide. Lithology is the most important element in the occurrence of landslides in the range. The surface density model is worth more than 12%.
Keywords: Shirvan watershed, information weighing method, landslide, surface density model.
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Type of Study: Research | Subject: Special
Received: 2018/10/25 | Accepted: 2020/01/20 | Published: 2021/02/20
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