Investigation role of tectonics and lithology on slope instability, in the highlands north of Orumieh Lake, Using GIS (A case study of the north basin of water spreading schemes Tasuj)

Subject Areas : Geopolitic

Malek Rafiei ¹ , Farideh Asadian ² , Jamshid Yar Ahmadi ³

1 - کارشناس ارشد جغرافیای طبیعی (ژئومورفولوژی، هیدرولوژی) در مرکز تحقیقات کشاورزی و منابع طبیعی استان آذر بایجان شرقی و مسئول ایستگاه پخش سیلاب آبخوانداری تسوج
2 - استادیار گروه جغرافیا، دانشگاه آزاد اسلامی واحد علوم و تحقیقات
3 - دکتری ژئومورفولوژی و هیات علمی مرکز تحقیقات کشاورزی و منابع طبیعی استان آذر بایجان شرقی

Received: 2016-11-17 Accepted : 2016-11-17 Published : 2015-07-23

Keywords: Tectonics, Water spreading Tasuj, ARC GIS, Constructors sensitivity, Mass movement,

Abstract :

This study was designed to investigate the role of tectonics and lithology of the major parameters affecting slope instability in the study area is examined. The study revealed that about 90% of the body surface elevations north basin sedimentary formations are composed of water spreading Tasuj. Performance of heavy tectonic especially to resistant and non-resistant, creating congestion fault-up (km2 / km) 2/2 with rule systems, Periglacial erosion, especially at altitude 1700 meters high makes up the physical degradation of rocks and receding cliff streams Banks typically isolated, drawn very widely in the region to form. To study aims to investigate the software Arc GIS and remote sensing data used and eventually plans to map geological tectonics and lithology and sensitivity of mass movements in the unstable range, the combination of combine the. The results show that the instability prevailing in the region, mainly debris slope range (Debris slide) and debris valley (Debris flow) and their dynamics have also mostly of natural origin, which are among the factors to be effective the role of tectonics and lithology, geological structure associated with susceptibility to type such important parameters affecting their pay. The results of quantitative analysis showed that the most unstable range (mass movement) due to faults in the region and formations susceptible to erosion has occurred.