Main Article Content

Abstract

Flood risk management is of utmost importance when it comes to drainage designs and flood management to save victims yearly. Runoff generation from catchment to downstream areas results in the increase in overland flows and if drains are of inadequate capacities, flooding occurs. This research basically looks at how floods are managed in Kofrom in the Ashanti Region of Ghana as a result of bad drainage designs from contractors or engineers and flood experts. Method employed for this study include feasibility studies and drainage engineering studies of the study area to assess the hydraulic structures and drain capacities. It was established that most of the drains are of inadequate capacity with a high degree of siltation. The drains are of inadequate capacity to take all runoffs from its catchment since urbanization has increased within a catchment and hence increasing the runoff generation. This decreased drain capacity results in high levels of overland flows and floods each year. Investigations for this research work was done in collaboration with Ghana Highway Authority, Hydrological Service Department and NADMO as they are in charge of all runoff generation on our roads and in drains and flood impact assessment and actions. It was established that in order to prevent future floods in the study area, there is the need for widening, increment, designing and construction of drainage structures to cater for the increase in runoffs generated due to increase in impervious areas. There is the need for drainage engineers to do serious feasibility studies and apply technologies employed in great engineering countries like Dubai, United States of America and the United Kingdom in drain designs and constructions. Field investigations revealed that most newly constructed drains are left half filled with soils, bitumen and chippings after road constructions by road contractors. Strategic understanding of floods in areas in Accra should be well studied and applied to prevent future floods in Kofrom in the Ashanti Region of Ghana.

Article Details