Assessment and recognition of structures characteristics of perennial and ephemeral rivers in Tehran province
Keywords:River, Structures, Structures quantity, System of rivers and stream Data, ARC GIS Soft wares, Tehran Province
In this study, at the first step, the hydrographic net of province rivers were provided based on topography map (1:25000 scale) and hydrographic net from Tamab Iran (Company of Iranian Water Recourses Engineering). Based on these definitions, whole of Tehran province area was divided to 25 different areas. In this study, the areas comprises 415 streams, and in difference distances the complications e.g. bridge, terraces, diversion dam, floor dam, slop breaker, dike, epi, height of structures location, area of structures and impure slop in structures were evaluated in term of quality and quantity. Their conditions were presented in 25 area in our study area followed by tables and related descriptions. The results showed that maximum and minimum abundance were bridge (715 cases) and dike (6 cases), respectively. Eventually, with the implementation of this research, the quantity and quality of structures such as bridge, terraces, diversion dam, floor dam, slop breaker, dike, epi, height of structures location, in the watershed basins of Tehran, Damavand, Bileghan, Delichai, Jajrood Astalak, Varangerood and Lar are determined.
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