期刊名称：Environmental Research, Engineering and Management
印刷版ISSN：1392-1649
电子版ISSN：2029-2139
出版年度：2017
卷号：73
期号：4
页码：41-57
DOI：10.5755/j01.erem.73.4.19553
语种：English
出版社：Kauno Technologijos Universitetas
摘要：Characteristics and spatial variation in geomorphic processes in the Meenachil river basin in southern Western Ghats, Kerala, India, is documented by analyzing the hypsometric parameters of 49 subwatersheds of 5 th , 4 th and 3 rd order. Hypsometric curves and parameters such as hypsometric integral ( Ea ), maximum concavity ( Eh ), coordinates (a*, h*) of the curve-slope inflection point (I), normalized heights of the hypsometric curve at 20%, 50% and 80% of the area indicate spatial variation. Longitudinal profile of the river shows a highly disturbed region above, a flow length of 20km and relatively less disturbed area downstream. Hypsometric integral classifies most of the subwatershed into mature and mature to old age transition while varying shapes of the hypsometric curves imply the influence of tectonic uplift. Variation of hypsometric concavity in close spatial proximity also confirms the variation in the effect of tectonic processes in the region, where the combination of fluvial and diffusive process is active and are evident from the high hypsometric head and toe measurements. Repeated occurrences of earthquakes in the region confirm the presence of ongoing tectonic activity, which have direct bearing on the geomorphic characteristics of river basin. DOI: http://dx.doi.org/10.5755/j01.erem.73.4.19553
关键词：Hypsometry; concavity; landforms; Meenachil; Western Ghats
