Investigation of Hydromorphological Effects of Eastern Slopes of Talesh Heights (Regressive Erosion) and Its Consequences on Western Slopes Overlooking Ardabil Plain (Captivity and Deviation(

The north-south trend of Talesh heights, along with its other natural features, has had a major impact on the region's geomorphological system, which can lead to large and unimaginable developments in neighboring basins. One of the most obvious of these developments is captivity and riverdiversion. The research method was performed using topographic, geological and geomorphological maps 1: 25000 based on field visits and data analysis based on form and process. Purpose, identification and introduction of vulnerable points of regression erosion in eastern slopes and captivity points. The results show that the difference in height (1480 m), high slope (50%) and high rainfall (1350 mm) had the greatest impact on the instability and instability of the eastern slopes of the Talesh heights and the effects of regressive erosion on the branches of "Aghchai and Degarman". Kash "is clearly visible. In contrast, the western slopes overlooking the Ardabil plain, especially around the village of Abi Biglou, not Neh Kran, Niaragh, there are traces of captivity and river diversion, so that the most vulnerable place in the northeast of Niaragh village is in coordinates. Geography 52-17-38 x = and 27- 37-48 = y is recorded at an altitude of about 1348 meters. If the height is reduced to about 33 meters for any reason, at this point it is possible to capture and divert the water resources of Ardabil plain to Gilan plain. If this happens, it will have devastating environmental consequences, especially for the residents of the villages in the area.