Abstract: This experiment has been conducted to study hydraulic characteristics of overland flows on a fixed bed laboratory model with simulated vegetation cover of 9.3%, along with an analysis on variations of hydraulic parameters of overland flows under different discharges and different bed slopes using the theories of fluid mechanics and hydraulics. Measurements show that average velocity of water flow on the vegetation slope increases with bed slope and flow rate, and that the relationship can be expressed by either a linear or power function, but with the linear one superior. These two functions can also well fit the relationship of water depth versus bed slope and flow rate. Froude number of the vegetation slope water flow decreases with the increasing flow rate but increases with bed slope, following a power function, but its variation is evidently dominated by bed slope and much less dependent on flow rate. Resistance coefficient of the flows varies in a hump shape, reaching its peak in the Reynolds number range of 1500 to 2000. In the range beyond 2000, it is decreasing inversely with Reynolds number and then gradually approaching a stable value. Thus, the relationship of resistance coefficient versus Reynolds number is not monotonic.