عنوان مقاله [English]
نویسنده [English]چکیده [English]
Roein basin is one of the sub-basins of CalShour River, which is located in the northeastern part of Iran, on the southern slopes of the Aladagh Mountains. Tectonic activities of this basin has been started from the last Laramide orogeny and is continuing. These activities, in addition to the occurrence of natural disasters have many effects on different characteristics of this basin. Information about the tectonic activities due to the vicinity with this basin and its influence on Bojnoord city, (center of Northern Khorasan province) and river planning is a necessity.To investigate these activities ,Morph tectonic indicators which were related to geomorphologic were used, It means the comparison of the longitudinal and logarithmic profile; width of the valley floor index to its height ratio (vf), Sinuosity Mountain Front index (smf), sinusoidal index of river (s) and index of tectonic activities(lat). The obtained results of these indicators and the influence of folds indicated that this area is subject to intense tectonic activities and these activities in this basin have caused irregular longitudinal profile of rivers, deep and narrow valleys, extended basins and the low maze path of rivers and mountain front. Also , this study indicate that tectonic activities at the tributary of this river, in fact in the Domannim region has reached to its peak and its result is a narrow strait , steep rocky and the river slope phenomenon which is given special feature to the topography of this basin.