Development of a flood-frequency model for the river basins of the Central Region of Malawi as a tool for engineering design and disaster preparedness in flood-prone areas
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Authors
Laisi, Elton
Issue Date
2016-09
Type
Dissertation
Language
en
Keywords
Flood frequency , Homogeneity test , Hydraulic structures , Land use and land cover change , Return period
Alternative Title
Abstract
Since 1971, a number of flood frequency models have been developed for river basins in
Malawi for use in the design of hydraulic structures, but the varied nature of their results
have most often given a dilemma to the design engineer due to differences in magnitudes
of calculated floods for given return periods. All the known methods for flood frequency
analysis developed in country so far have not used a homogeneity test for the river basins
from which the hydrological data has been obtained. This study was thus conducted with a
view to resolving this problem and hence improve the design of hydraulic structures such
as culverts, bridges, water intake points for irrigation schemes, and flood protection dykes.
In light of the above, during the course of this study the applicability of existing methods
in the design of hydraulic structures was assessed. Also, the study investigated how land
use and land cover change influence the frequency and magnitude of floods in the study
area, and how their deleterious impacts on the socio-economic and natural environment in
the river basins could be mitigated
Description
Citation
Laisi, Elton (2016) Development of a flood-frequency model for the river basins of the Central Region of Malawi as a tool for engineering design and disaster preparedness in flood-prone areas, University of South Africa, Pretoria, <http://hdl.handle.net/10500/23597>