Volume 16, Issue 1, June 2015, Pages 86–94
V.B. Rekha1
1 School of Environmental Science, Mahatma Gandhi University, Kottayam, Kerala, India
Original language: English
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Morphometric analysis is important in any hydrological investigation and it is inevitable in development and management of drainage basin. The present study is an attempt to evaluate and compare various morphometric parameters and prioritization of micro-watersheds based on water holding capacity of Kokkayar sub-watershed, a typical highland sub-watershed of Manimala river basin. Morphometric analysis and prioritization of micro-watersheds have been achieved through measurement of linear, aerial and relief aspects of basins by using remote sensing and GIS techniques, and it necessitates preparation of a detailed drainage map. For prioritization, 9 micro-watersheds are delineated and morphometric parameters such as Rb, Dd, Fs,T, Lof and C are calculated separately and prioritization has been done by using the Raster calculator option of Spatial analyst. The analysis reveals that the stream order varies from 1 to 4 and the total number of stream segments of all orders counted as 200. Lsm varies from 0.50 to 7.55. Higher value of mean Rb (4.17) (linear parameters), higher values of Bh (0.08), Rh (0.07) and Rn (3.02) (relief parameters), high values of Dd (3.2), Fs (6.3), T (5.63) and low values of Lof (0.16) and C (0.31) (aerial parameters) all together reveal that the sub-watershed has a complex structure, mountainous relief, high runoff and low infiltration. The maximum area is covered by high prioritized zones (12.72 km2) followed by very high (10.63km2) while very low zone is only 9.37 km2.
Author Keywords: Linear parameters, Relief parameters, Aerial parameters Kokkayar sub-watershed, Manimala river basin.
V.B. Rekha1
1 School of Environmental Science, Mahatma Gandhi University, Kottayam, Kerala, India
Original language: English
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Morphometric analysis is important in any hydrological investigation and it is inevitable in development and management of drainage basin. The present study is an attempt to evaluate and compare various morphometric parameters and prioritization of micro-watersheds based on water holding capacity of Kokkayar sub-watershed, a typical highland sub-watershed of Manimala river basin. Morphometric analysis and prioritization of micro-watersheds have been achieved through measurement of linear, aerial and relief aspects of basins by using remote sensing and GIS techniques, and it necessitates preparation of a detailed drainage map. For prioritization, 9 micro-watersheds are delineated and morphometric parameters such as Rb, Dd, Fs,T, Lof and C are calculated separately and prioritization has been done by using the Raster calculator option of Spatial analyst. The analysis reveals that the stream order varies from 1 to 4 and the total number of stream segments of all orders counted as 200. Lsm varies from 0.50 to 7.55. Higher value of mean Rb (4.17) (linear parameters), higher values of Bh (0.08), Rh (0.07) and Rn (3.02) (relief parameters), high values of Dd (3.2), Fs (6.3), T (5.63) and low values of Lof (0.16) and C (0.31) (aerial parameters) all together reveal that the sub-watershed has a complex structure, mountainous relief, high runoff and low infiltration. The maximum area is covered by high prioritized zones (12.72 km2) followed by very high (10.63km2) while very low zone is only 9.37 km2.
Author Keywords: Linear parameters, Relief parameters, Aerial parameters Kokkayar sub-watershed, Manimala river basin.
How to Cite this Article
V.B. Rekha, “Micro-watershed Prioritization of Kokkayar Sub-watershed, Manimala River Basin, Kerala, India,” International Journal of Innovation and Scientific Research, vol. 16, no. 1, pp. 86–94, June 2015.
