“…are now being engaged in a GIS environment (e.g., Harvey & Eash, 1996;Mesa, 2006;Rai et al, 2017;Rajasekhar et al, 2020;Resmi et al, 2019;Saha et al, 2017;Thomas et al, 2012), which are different from the conventional methods (Horton, 1945;Strahler, 1952Strahler, , 1964. Morphometry of any drainage basin or river system fundamentally focuses on the mathematical quantification of the physiography and hydro-geomorphic evolution of the drainage or river basin (Clarke, 1966;Swarnkar et al, 2020). This form of drainage basin analysis is very essential in the development of an integrated understanding of i) the hydro-geomorphic systems of the basin (Swarnkar et al, 2020;Yang & Shi, 2017); ii) the geomorphic response of the basin to various processes and their driving factors (Bahrami et al, 2020;Gregory & Walling, 1968); iii) the assessment of tectonically controlled landscapes (Pedrera, Pérez-Peña, Galindo-Zaldívar, Azañόn & Azor, 2009;Bahrami et al, 2020;Faghih & Nourbakhsh, 2015;Rahimzadesh et al, 2019); iv) the quantitative evaluation of sediment yields, and the relationship between the sediment yields records and the river basins (Ludwig & Probst, 1998;Verstraeten & Poesen, 2001); and, v) anthropogenic impacts of humans on the basins and that of the basins on human societies (Keller & Pinter, 2002).…”