Abstract

Evaluating Effects of Stormwater Infrastructure Projects on Flooding in Ghana.
Track: Water, Wastewater, and Stormwater
Authors: Robert Baffour

Accra, the capital of Ghana experiences flooding every year. For the past six years, several stromwater infrastructure projects have been undertaken to reduce flooding in the city. The impact of these projects on flooding is not known. This paper discusses a project conducted to evaluate the effect of various stormwater infrastructure projects on flooding in Accra. Data from the National Disaster Management Organization was used to determine the extent of flooding over several years. Similarly, Using GPS, data on stormwater infrastructure data was captured and used to develop a stormwater facility map using ARCGIS. GIS based impact analysis was then used to determine the value of these construction projects on flood reduction in Accra. The results of the study vary on type, size, location and extent of flooding. The results provide users of the relative significance of the implementation of stormwater structures on flooding.