| Autor: |
Ismail, Mujtaba, Singh, Harmeet, Farooq, Ishfaq, Yousuf, Nahida |
| Zdroj: |
Applied Geomatics; Jun2022, Vol. 14 Issue 2, p119-134, 16p |
| Abstrakt: |
Quantitative drainage morphometric analysis has assumed tremendous significance as it plays an important role in understanding the hydrological response behaviour of a drainage basin. Different potential hazards like floods and soil erosion can be predicted by software-based quantitative drainage morphometric analysis. The present study deals with the measurement of linear, areal and relief quantitative morphometric parameters of Veshav and Rembi Ara watersheds. These two watersheds were taken into consideration because of their high contribution of water flux to the main trunk stream especially during a flood event. The quantitative morphometric parameters were derived in GIS environment by using ASTER DEM (30 m resolution) data of United States Geological Survey (USGS). GIS has emerged as an effective, time saving and accurate technique for morphometric analysis of a watershed. GIS-based morphometric measurements are more accurate and precise than manual measurements. The raster data in the form of Digital Elevation Model (DEM) was processed and analysed in a QGIS software by using different algorithmic methods. Based on the morphometric analysis, it is implied that out of the two watersheds, Veshav has more potential of discharging efficiently the flux in the form of surface runoff. The observation was supported by the values calculated for various reliable morphometric parameters such as mean bifurcation ratio, form factor and texture ratio associated with the basins. The circulatory and elongation ratios of the watersheds also indicate that Veshav River drains a large amount of water due to its more circular basin shape than Rembi Ara River which has an elongated shape. The relief and areal morphometric parameters like basin relief and length of overland flow reflected that Rembi Ara has a more flow velocity than Veshav due to differentials in quantitative drainage morphometric controls. The outcome of the study could be helpful in proper decision-making and sustainable management of the study area. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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