The reconstruction of permanent snow line elevation Quaternary in Alvand's Hamedan (By three methods of Wright, Slop- direction and Curvature coefficient)

Exist of Glacial cirque in northeast and southwest of Alvand Mountain and the presence of moraine an expressive glacial process in the Quaternary Period. Therefore the height of the permanent snow line on the slopes of this mountain mass was evaluated in this study. The estimated height of the snow line to the right, above the permanent snow line estimated in northeastern slopes (slopes towards the southwest) by the way, shows the persistence of snow and glaciers formed in these parts. Furthermore, a comparison between this method and the method of gradient and curvature coefficient was used. Although the difference in the gradient direction toward the snowline but it also seems reasonable (530 meters), according to field evidence seemed unlikely. Because of the curvature coefficient curves presented in this study are the first to estimate the height of the snow line is used. Coefficient of curvature of the curve with the distance from the dominant peaks in the foothills of the basin, the trend has been downward and then upward. The process of changing the curvature coefficient perigee height as the height of the graph is known. Due to the proximity of the height to the height of the snow line altitude was estimated as the previous method, it was concluded that the perigee height, curvature coefficient Quaternary basin can be considered as the height of the snow line. Three methods of estimating the height of the snow line, anddifference in the amount of quaternary cold different domains suggests that Significant differences in the slopes of the mountain front elevation Synuzyth can estimate the height of the snow line and the error effectively.