Spatial Identity and Landslide Risk in Eastern Alamut (Case Study: Ovan Lake)

Document Type : Research Article

Authors

• Gholam hassan jafari ¹
• Minan Timaji ²

¹ University of Zanjan

² Geography department, university of Zanjan

10.22067/geoeh.2023.82684.1375

Abstract

The spatial identity plan and the effects that this component has in the analysis of the distribution patterns of natural and human phenomena and their arrangement have opened new horizons in the knowledge of geomorphology. The introduction of cognitive fields such as space arrangement and phenomenology and the creation of novel concepts in geomorphology has doubled the power of this knowledge. Such ability reveals the role of place in spatial behaviors and events. In this article, by relying on the drawing techniques of understanding, the relationship between the theoretical and epistemological foundations of the spatial identity of the lake is explained at a certain level and scale. For this purpose, we counted the geomorphic evidence and explored their role in the identification of Ovan Lake. Landslide occurs mainly due to the interaction of different vectors. The issue under discussion is how the vectors affecting the landslide that created Ovan Lake interact. To answer this question, in addition to field survey, 30-meter DEM data derived from SRTM sensor were used. All the data collected remotely were reprocessed and geometrically corrected by land data collection and GPS data then they were entered into ArcGIS and Global Mapper software, and we analyzed the lithology, climate and topography of the place. The results indicate that several factors have contributed to the formation of Ovan landslide: 1- The material of rocks in the basin, 2- Temperate and semi-humid climate conditions of the basin, 3- Faults that cause different stones to collide and connect with each other, 4- Evidence of changes in the base level of shahroud and Jeneh River, 5- Existence of water under pressure, 6- Change in thickness and cement of Andaj conglomerate in the vicinity of Ovan lake, 7- Change in topography and hydrology conditions locally, due to the occurrence of small landslides.

Keywords

• Landslide
• Hillside Motions
• Morphometric
• Ovan

Main Subjects

• لغزش و حرکات توده ‌ای

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