Investigation of scale dependence and geomorphic stages of evolution through hypsometric analysis: a case study of Sirsa basin,western Himalaya,India |
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Authors: | Pratik Dash S.P. Aggarwal Surajit Ghosh |
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Affiliation: | 1. Department of Geography, Banaras Hindu University, Varanasi, India;2. Water Resources Department, Indian Institute of Remote Sensing, Dehradun, India |
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Abstract: | Hypsometric analysis is an important tool to identify and justify the erosional status, erosional processes, geologic and tectonic influences, and stage of landscape development of a basin. In this study, scale dependence of hypsometric integral (Ea) and hypsometric curve parameters were derived and analysed for various order sub-basins of Sirsa river. Here, Ea of higher order sub-basins are quite scale dependent and controlled by lithology; albeit Ea of all order sub-basins is independent of tectonic uplift. Based on Ea, all fourth and fifth order sub-basins were categorised in three classes. The analysis of hypsometric curve parameters showed that sub-basins of first category (Ea < 0.35) is characterised by upward-concave curve, fluvial process dominated and early old stage landscape. Sub-basins of second category (0.35 < Ea < 0.45) reflects concave-convex curve, dominance of fluvial process and mature landscape; whereas third category sub-basins (Ea > 0.45) are diffusive process dominated and belong to late youth to early mature stage. |
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Keywords: | hypsometric curve scale dependence fluvial process Sirsa river |
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