| The establishment of Intensity-Duration-Frequency (IDF) curves for precipitation remains
a powerful tool in the risk analysis of natural hazards. Indeed the IDF-curves allow
for the estimation of the return period of an observed rainfall event or conversely of
the rainfall amount corresponding to a given return period for different aggregation
times.
There is a high need for IDF-curves in the tropical region of Central Africa but
unfortunately the adequate long-term data sets are frequently not available. The
present paper assesses IDF-curves for precipitation for three stations in Central
Africa. More physically based models for the IDF-curves are proposed. The
methodology used here has been advanced by Koutsoyiannis et al. (1998) and
an inter-station and inter-technique comparison is being carried out.
The IDF-curves for tropical Central Africa are an interesting tool to be used in
sewer system design to combat the frequently occurring inundations in semi-urbanized
and urbanized areas of the Kinshasa megapolis. |