Environmental Engineering Reference
In-Depth Information
Altitude
Slope gradient
Slope aspect
Catchments
Stream channel
Order according to Strahler
Topmodel wetness
Figure 11.6
Topographic and hydrological factors derived from the Tambito DEM using the D8 algorithm for flow routing.
hydrologically
significant
properties
of
catchments
Their geomorphological and pedological characteristics
(and their spatial variation) which determine the poten-
tial for infiltration and local storage over runoff and
thus the contribution of hillslopes to streamflow. The
large-scale geomorphology will also control the topol-
ogy of the drainage network, which may be the most
important control on the hydrology in large catchments
•
themselves. These properties include:
The topological structure of their drainage network,
which determines the lag time for arrival of rainfall to
a point in the network and the temporal concentration
of the streamflow hydrograph which results.
•
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