THE IMPACT OF RESOLUTION OF TOPOGRAPHIC INFORMATION FOR RUNOFF ANALYSIS

Abstract

Spatial resolution of topographic information gives influence to runoff analysis. In general, geophysical phenomena are considered as random process.
In this paper, the Kinematic Wave model is used as a runoff system, and simulutaneous equations for the first-to fourth-order moments of water depth and concentration time under the impact of rectangular rainfall inputs and slopedistribution are theoretically derived. The validity of the proposed equations is cross-checked by results of a simulation. It is possible to estimate the probability density functions of water depth and concentration time by using the first-to fourth-order moments.