| Abstrakt: |
Management of water resources has become critical due to reduction in the shortage of water. Hence, it is vital to assess the geometry of watershed to determine its influence of such process on its hydrology. This study was conducted in the Barak watershed to prioritize its sub-watersheds using morphometric analysis (MA), land use/land cover (LULC) analysis and soil conservation service curve number method (SCS-CN). Entire watershed was divided into eleven sub-watersheds (SW’s). Three important parameters (Arial, Linear, and Relief aspects) were found for each SW ranging from the MA and finally rank was allocated to each of the SW based on the value with erodibility so as to attain a compound value for the final ranking of the SW. From analysis of LULC mapping (1988–2018) it was found that substantial changes have occurred such as reduction in dense vegetation by 3.48%, water bodies by 23.48%, increase of built-up 73.76%, cultivated area by 8.08%, and significant increase in river bed deposition by 53.37%. For a given rainfall event, to predict the direct runoff volume, (SCS-CN) was used. The surface runoff varies from 594.16 mm to 1276.58 mm. All SW were categorized as low, medium and high based on priority. Among all SW’s, SW2, SW3, SW9 and SW10 were on high priority based on MA, SW3, SW5 SW-9 and SW10 based on LULC analysis and SW2, SW4, SW6, and SW8 based on SCS-CN method. Most vulnerable SW’s are those with high priority and therefore, Government should pay more attention to them in creation of decision for the conservation of watersheds. |
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