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Using GIS & RS in Mass Movements Hazard Zonation - A case study in Germichay Watershed, Ardebil, Iran
A. Esmali
PHD student of Watershed Management, Natural Resources Faculty, Tehran University, Karaj, Iran,
Email: Yashar_esmi@yahoo.com
H. Ahmadi
Full Professor of Natural Resources Faculty, Tehran University, Karaj, Iran
Introduction
As a final goal, the investigation and studying of landslides is to find ways to reduce their damages. This objective is possible via different ways such as landslides hazard zonation for determining the hazardous areas and providing recipes and regulations for appropriate uses of these areas or for keep away from they. Also it can be earned by studying a one landslide and presenting ways to control it.
Nagarajan et al (1998) in part of western ghat in India used temporal remote sensing and GIS techniques to zonate the landslide hazard and said that their works were too successful in comparing with previous manual methods[3].
Hassanzadeh (2000) has been used the Multiple Regression method and GIS technique for landslides hazard zonation with using four factors lithology, slope angle, precipitation and land use, and has been assessed the results very successful [2].
Germichay watershed was selected for this study that runs from 48? 01? to 48? 10? eastern longitude and from 38? 54? to 39? 12? northern latitude. This watershed is a part of Ardebil province, Iran, and reaches from north and south to Azerbayjan republic, from east reaches to Arazchay watershed and from west reaches to Sarighamishchay watershed. This watershed contains Germi City that lies in it center. Its area is about 180 km2 that 55% of it is mountainous and 45% of it is the plain areas.
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