A DESIGN OF A STORMWATER DRAINAGE SYSTEM FOR GATWEKERA VILLAGE IN KIBERA SLUM NAIROBI, KENYA
Documentation : 

Poor drainage is at the heart of informal settlements. Kibera is the largest most complex informal settlement in the Kenyan capital Nairobi located not so far from Nairobi city along River Ngong in which the study area is located. Gatwekera the study area is one of the villages that makes up Kibera slum.Flooding has been a very common phenomenon in Gatwekera slums this can be accredited to poor or in some areas lack of proper storm water drainage systems, increase in built area and climate change. The residents of Gatwekera have tried several ways to reduce the effects of these flood major one being construction of crude open channels that do not put into considerations the design requirements of a drain hence the problem persist. For this reason, there is need for a properly designed storm water drainage system.

The main objective of this project was to come up with a well-designed stormwater management system for Gatwekera area. To achieve this, the area characteristics were investigated, the magnitude and the frequency of the peak generated runoff was determined which in turn was used to size the system after which the system earth works calculations were done using AutoCAD Civil 3D.

From the literature review done it was concluded that he best method to use to determine peak runoff magnitude will be the Rational method. And a return period of10 years. In the entire process, AutoCAD civil 3D, Google Earth, QGIS and Ms. Excel software were used to achieve the goal of this project.

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