CS(AR)-7/97-98 : Geomorphological study of Myntdu river basin

Abstract

Hydrogeomorphological parameters of drainage network provide simple means, specially in mountainous and ungauged catchments to develop empirical rainfall-runoff relationships, synthetic hydrograph parameters and to develop regional Geomorphological Unit Hydrograph. In this case study, a 1:50,000 scale Survey of India map of Myntdu river basin has been used. The map is digitised using Calcomp digitising tablet in AutoCAD. The geomorphological parameters consisting of linear, areal and relief aspects of the drainage network of the basin have been worked out using the facilities of AutoCAD and by developing some computer programs which can handle DXF files (ASCII format) of AutoCAD.

The report also briefly reviews various methods of estimation of geomorphological parameters established by numerous investigators throughout the globe. The results would be utilised in various hydrological studies now ongoing in the area in connection of a proposed hydroelectric power project. Particularly the quantitative estimates of the geomorphological parameters for the basin would be utilised for the development of Geomorphological Instantaneous Unit Hydrograph for the basin.