Bulletin of the Geological Society of Malaysia, Volume 20, August 1986, pp. 803 – 815
Department of Geography, University of Malaya, Kuala Lumpur
Abstract: Hydrogeomorphological studies have stressed the significance of catchment geomorphology and its causal link with streamflow parameters. Such studies are invaluable not only from the standpoint of the dynamics of fluvial geomorphology but its practical value for streamflow prediction/estimation purposes. A classic example of such studies is illustrated by the work of Carlston (1963). Utilizing a single morphometric property, drainage density, the theoretical link between catchment geomorphology and basin runoff response can be summarized in the modified Jacob groundwater flow model equation T = WD-2/8ho, in which T is transmissibility, W is recharge, D is drainage density and ho is the height of the water table at the water table divide.
This study of 15 drainage basins in Peninsular Malaysia attempts to test the significance of basin morphometric variables such as drainage density, stream magnitude, relief ratio, ruggedness number and bifurcation ratio in influencing basin runoff response such as baseflow, peakflow and flood runoff. Correlation and multiple regress ion analyses are used to establish the relationships between basin morphometric variables and basin runoff response. It is concluded that basin morphometric variables are closely related to runoff response and the empirical equations established can be utilized for streamflow estimation on ungauged basins.