Geospatial approach to elucidate anomalies in the hierarchical organization of drainage network in Kuttiyadi River Basin, Southern India

作     者：Thulasi Veedu SWETHA Girish GOPINATH Arun BHADRAN Arjun P Thulasi Veedu SWETHA;Girish GOPINATH;Arun BHADRAN;Arjun P

作者机构：Department of Geology and Environmental ScienceChrist CollegeKerala 680125India Geomatics DivisionCentre for Water Resources Development and ManagementKerala 673571India Department of Climate Variability and Aquatic EcosystemsKerala University of Fisheries and Ocean StudiesKerala 682508India Earthquake Geology DivisionGeological Survey of IndiaNER Shillong 793014India 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2022年第16卷第3期

页      面：786-797页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：CWRDM Executive Director, Centre for Water Resources Development and Management Geological Survey of India NER Shillong 

主　　题：river basin hierarchical anomaly bifurcation index stream gradient index denudation index Cartosat-1 DEM 

摘      要：An assessment of anomalies in the hierarchical organization of the drainage network in the Kuttiyadi River Basin(KuRB),Kerala,has been performed by considering various morphometric parameters such as bifurcation index(R),hierarchical anomaly index(Δa),hierarchical anomaly density(ga),and stream gradient index(SL)in a geographical information system(GIS)***,a digital elevation model(DEM)of the area has been generated from Cartosat stereo pair data at 2.5-m *** computed quantitative information about drainage characteristics reveals the highest drainage anomaly is observed in sub-watersheds(SW)III and *** is observed that neo-tectonic activity caused the development of younger stage drainage patterns of structural controls in the sub-watersheds of this river *** tectonic activityinduced diffusion,high energy fluvial erosion,and anthropogenic interferences altered the hierarchical organization of the drainage network of the sub-watersheds in mature to old stages of geomorphic *** results of finding validated with asymmetry factor and ratio of the hierarchical index(Δa)with hierarchical anomaly number(A),bifurcation index(R),direct bifurcation ratio(Rdb),stream gradient index(SL),and denudation index(logTu).From the denudation index analysis,the sediment yield of the river basin is identified as 0.67 t·km^(−2)·yr^(−1).Moreover,the asymmetric factor(AF)in the KuRB shows the imprints of Paleo−Neo Proterozoic crustal tilting toward a NNW−SSE direction.