Morphometry and its implications to stream sediment sampling: A study on Wajrakarur Kimberlite field, penna river basin, Anantapur district, Andhra Pradesh, India

摘要

Morphometric analysis, including certain linear, areal and relief parameters, has been performed on watersheds covering pipes in the Wajrakarur kimberlite field (WKF) of Anantapur District, Andhra Pradesh, using hydrological data in corroboration with lithological and structural information. In total, 64 morphometric parameters were calculated for the study area. Litho-structural set up revealed that drainage system is influenced by lineaments. Higher values of morphometric parameters like sinuosity index, bifurcation ratio, gradient ratio, ruggedness number, dissection index, Rho coefficient are indicative of trap site quality, in the study area. As a tool for conceptual understanding, morphometric analysis can be considered as a process step before planning indicator mineral sampling for a terrain, thereby deciphering the category of possible trap sites that can occur in the area of interest, before commencing the actual sampling programme.? Taking the WKF as a case, a relation between certain morphometric properties and plausible quality of indicator mineral trap site has been envisaged in this paper.