The Study of Morphological Characteristics for Best Management Practices Over the Rampur Watershed of Mahanadi River Bas
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RESEARCH ARTICLE
The Study of Morphological Characteristics for Best Management Practices Over the Rampur Watershed of Mahanadi River Basin Using Prioritization Priyanka Gunjan1 • S. K. Mishra1 • Anil Kumar Lohani2 • Surendra Kumar Chandniha2 Received: 2 April 2018 / Accepted: 14 October 2019 Indian Society of Remote Sensing 2019
Abstract A morphometric analysis has been carried out for Rampur watershed of Mahanadi river basin, and its nine sub-watersheds have been prioritized according to the linear, aerial and relief characteristics. Based on digital elevation model, delineation of sub-watersheds (SWs) has been done by using ArcMap 10.2.2. The drainage analysis and their respective parameters such as stream order, stream length, stream frequency, drainage density, texture ratio, form factor, circulatory ratio, elongation ratio, bifurcation ratio and compactness coefficient for the sub-watersheds have been evaluated by applying remote sensing and geospatial techniques. Based on the behaviour of morphometric parameters of each sub-watershed (SW), the prioritized score has been allocated, and thereafter, the most sensitive parameters have been distinguished by the evaluated combined scores. The results achieved from the analysis show that the stream order varies from 1 to 6 and the first order covers 30.5% of the total catchment area. The watershed has 2087 stream segment numbers of all order. Based on morphometric analysis, prioritizing each SW has been the primary objective of this study. The final score of each subwatershed has been allocated as per erosion threat. The highest priority has been allocated to the SW which shows the least compound parameter value. Eventually, the grouping of SWs has been done according to the high (4.0–4.7), medium (4.8–5.3) and low ([ 5.4) priority classes depending on their prioritized score, maximum (6.0) and minimum (4.0). Keywords Prioritization Morphometric parameters RS and GIS Rampur watershed
Introduction Urbanization, industrialization and rapid increase in population are unavoidable in the present developing world. The rate of consumption of natural resources like land and water is notably in large amount. For sustainable development, optimum utilization is necessary for meeting the demands of these resources. In this paper, emphasis is given to the management/study of water resources. Precipitation is the main source of water, which merges streams and rivers when it approaches the surface of the
& Priyanka Gunjan [email protected] 1
Department of Water Resources Development and Management, Indian Institute of Technology, Roorkee, India
2
Surface Water Hydrology Division, National Institute of Hydrology, Roorkee, India
Earth and infiltrates in the soil as groundwater. Further, there are many factors that are responsible for water percolation like topography, type of soil and geologic control of the area. Morphometry is the process of mathematically analysing and quantifying the arrangement of the Earth’s surface and the external shape and dimensions of
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