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Information Journal Paper

Title

Morphometry and reconstruction of the Moallem-Kalaye landslide

Pages

  59-78

Abstract

 Landslides move a huge volume of materials from a place to another place. Moreover, landslides may lead sediment to increase in Downstream of the basin which can be a threat to the populations and may cause erosion, in addition to affecting the landscape of the region. In this article, the landslide of Moallem-Kalaye in Alamut basin, one of the main sub-basins of the Shahroud, is investigated. The basis of the identification and studying of Moallem-Kalaye landslide is on field studies and Phenomenological interpretation. In this regard, in addition to the morphometry of different forms inside the landslide, the authors have climbed the surrounding heights and examined the role of related landforms in the happening of the catastrophic disaster. The topography prior to the landslide was rebuilt by the ArcGIS software and the result topography was analyzed against the current status. Next, the volume of the moved materials was estimated. The amount of the materials extracted in the landslide, by raster calculation in ArcGIS. The landslide of Moallem-Kalaye with the width of 1.3 kilometers (the crown part of the landslide), the longitude of 1.6 kilometers, and the average depth of 80 meters has taken place in the Conglomerate of the Andj, which has moved a sum of 91 million cubic meters. The existence of a Conglomerate with a very steep slope and marl filled with water, has led a wide area of materials to move. The area of the surface of failure has been roughly 2.632 square kilometers, the materials have scattered on a surface of more than 13.5 square kilometers. Findings show that weaker landslides in the upper side, ruins the hydrological situations of the lower side, regions and provides the grounds for huge landslide.

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