Estimation of total direct flood damage in the lower Orange River area with the aid of a flood simulation model - A GIS-approach

Abstract

Methodology with regard to construction of stage damage curves and flood damage simulation models was discussed in two previous articles. The integration of topographical, hydrological, hydraulic and economic information in flood damage simulation models makes it possible to determine the total impact of floods (direct and secondary) by means of stage damage curves and computer programs. Flood damage is firstly determined from the viewpoint of the individual (local viewpoint) and secondly from a regional and national viewpoint. Since the methodology to determine flood damage from a regional and national viewpoint (secondary damage) differs considerably from that of determining the total direct flood damage from a local viewpoint, it was decided to focus on the latter in this article. The floodplain of the Orange River, downstream from the Gifkloof Weir to the Manie Conradie Bridge at Kanoneiland, served as research area. *To whom all correspondence should be addressed.

Authors

Categories