TY - JOUR T1 - Engineering geomorphological assessment of lower Gamasiab river in east of Kermanshah province TT - بررسی خصوصیات ژئومرفولوژی مهندسی رودخانه گاماسیاب پایین واقع در شرق استان کرمانشاه JF - jeg JO - jeg VL - 7 IS - 2 UR - http://jeg.khu.ac.ir/article-1-387-en.html Y1 - 2014 SP - 1811 EP - 1832 KW - Engineering geomorphology KW - Catchment KW - Morplology KW - Gamasiab river KW - Kermanshah N2 - Awareness of orphological features of rivers is necessary for recognition of river behavior and optimum application of rivers. Overall catchment physiografy have important role for determination factors such as floods, erodible and sediment mutagenicity. In this study in order to understand the behavior of Gamasiab River in the east of Kermanshah province, geomorphologic features of this river has been considered. Study of engineering geomorphologic properties is done by using existing data from previous studies, site visit and field perceptions, study of geology and topography maps. Physiographic properties of catchment, channels morphologic properties and geology conditions in this region have been studied. In this research, several parameters such as average width, environment, area, hydrogeologic coefficient, catchment form, maximum, minimum and mean high, and longitudinal slope has calculated. Also status of drainage density of this river has been investigated and time to focus calculated. Finally this river review and classified according to various classifications for rivers M3 ER -