بررسي الگوي پيچان رودي رودخانه تالار با استفاده از شاخص هاي ضريب خميدگي و زاويه مركزي (1)

A study on the Meandering Pattern of Talar River in the Coastal Plain of the Caspian Sea

Many villages and urban areas are located on the traces of rivers. The water of these rivers is used for irrigation, drinking and industrial activities. On the other hand, the topography and soil of these lands are very suitable for settlements However, factors such as: the dynamism of the river, change of discharge and meandering, cause these lends thee :mine problems likc flood and direction change of rivers. This article, aims to survey the meandering pattern of Talar river in the coastal plain :a the Caspian Sea. In order to do this, coefficient of curvature (Leopold & Wolman method) and central angle (Kornise method) were used. The results showed that the metro sinuosity coefficient of curvatures was 1.39, which indicates high meandering of Talar river. On the other hand the sinuosity indicator (curvature coefficient) showed that 26.4 percent of meanders in Talar river were developed ones. Also, using central angle (Kornise method) showed that the mean central angles of Talar river was 129.1 degree. Therefore. 60.4 percent of curvatures of Talar river are developed and 25.5 percent are considered as very developed meandering. These coefficients show the necessity of using engineering methods for making the bed of this river stable.