Abstract:
Landslide is considered one of the natural hazards that brings significant human and financial losses every year. The occurrence of landslides in the northern regions of the country is increasing due to the conversion of forest lands into agricultural lands and roads, and one of the important solutions for reducing the damages caused by landslides is to avoid these areas. The Baranjestanak Dam watershed, with an area equivalent to 37 square kilometers, is located 13 kilometers southeast of Qaemshahr city in Mazandaran province. With the investigations carried out in the studied basin, we have witnessed two rotational landslide masses located at a distance of 100 meters from the dam and the northern part of the Baranjestanak Dam lake, where the area of the first mass was 6000 square meters and the area of the second mass was about 4000 square meters. The aim of the study was to identify the most important factors affecting sliding in the Baranjestanak Dam basin, and the method of work was descriptive-analytical and carried out using field observations. The results of the study showed that among the important factors in creating these landslide masses, lithological factors, the presence of rock outcrops and their density, and tectonics in the studied basin can be mentioned. The presence of landslide-sensitive formations with compositions such as clay, shale, and marly sediments of the Miocene periods and some Quaternary period sediments, along with the existence of active faults at the surface of the basin, can be effective factors in the occurrence of this phenomenon.
Machine summary:
ir,water news network Rvon Ouelled & plerrer Dupuis - November 2006-Choice Of Water Level Elevation For The Design Structures , Natural & Man –Mad Hazards , Canada 3-6 Winston Inc & Holt Rinehart – 2000 -Principles of Geography- PP 67-68- Identifying the effective factors of landslides in the catchment area of Berenjestanak Dam, Qaemshahr Dr. Bahman Ramezani * Associate Professor of Physical Geography, Islamic Azad University, Rasht Branch Hoda Ebrahimi Lecturer at Payame Noor University Abstract Landslide is considered one of the natural hazards that brings significant human and financial losses every year.
The aim of the study was to identify the most important factors affecting landslides in the Berenjestanak Dam catchment area, and the method of work was descriptive-analytical using field observations.
The aim of this research is to identify the geological and tectonic factors and their role in creating landslide masses in the Berenjestanak catchment area, as well as to provide appropriate management solutions to cope with the crisis caused by landslides in the study area.
114) By weighting intrinsic factors that are major causes of slope instability, such as geology, shape and degree of slope, relief, land use, and structural geology, and based on the Anbalagan method, the landslide hazard map of the Jiroft Dam catchment area has been prepared (Almaspour, 1384, pp.
They zoned the Qezelche sub-catchment of the Ahrchay River basin using GIS, and in this method, they also identified the factors affecting the occurrence of landslides, finding that factors such as slope, slope direction, land use, land cover, distance from the road, and rainfall have a greater impact on the occurrence of landslides.
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