مطالعه خاك شناسي منطقه طالقان با روش ژيومرفولوژي

Pedological Study of Taleghan Region by Geomorphology Method

Different methods are proposed and used for pedological studies in natural resources rsearch by different experts. Some of these methods are: geology, geomorphology, land evaluation, land suitability and vegetation methods. The aim of this research is to see how pedological studies by geomorphology methods are scientifically and economically suitable. For this purpose, six sub-catchments of Taleghan watershed located in the upper, middle and lower parts of the watershed were chosen. Each two sub-catchments were almost face to face and in opposite aspects (southern and northern aspects). Then, six photogeological investigations, field checks, and geomorphology maps of six sub-catchments were prepared on which geomorphological units, facies, types and sub-types were shown. Then, in each geomorphological facies, several soil profiles were made and soil samples were taken from them and the samples were analysed physically and chemically in the lab. Geomorphological studies have shown that nearly all sub-catchments consists of mountain unit (some sub-catchments, such as Shahrak-Taleghan, also consist of hill unit). Erosion processes including water erosion and physical weathering and in part chemical weathering prevail in the area and have developed numerous geomorphological facies. The results of laboratory soil analyses have shown that the geomorphology method can differentiate the boundaries of different soil groups with high accuracy.