Design and Implementation of a Low Cost and Efficient Water Delivery System for a Gated Community

ABSTRACT
Rapid population growth has caused a higher demand for energy consumption, more
land for the built environment and consumption of natural resources. Population and
settlement are a large determinant of other parameters such land use patterns, solid
waste generation and most importantly water consumption. Both the public and
private sector are investing in low cost housing to cater for the deficit in housing
caused by this population growth. There’s an estimated housing unit deficit of:
Rural- 6,766,205 houses
Urban- 3,101,415 houses
Kenya- 9,877,912 houses
Nairobi Water Company has the capacity to provide 520000m3/day out of the supply
740000m3/day therefore separate water delivery systems have to be put in place for upcoming settlements outside of the crowded city settlements.
The objectives of the project were to design, virtually test and implement a water delivery
system supplied from a private borehole separate from the main city supply by Nairobi Water Company. The site parameters were gotten through a virtual process using google earth and integrated into AutoCAD for the design of the two optional systems; Looped and Branched system. The elevations from this virtual analysis were then inputted into a software called WaterCAD that was used for the hydraulic analysis. The large database of results was then sieved through to select the most optimum pipe system and pipe diameters to deliver the required 600liters/day to the 182 houses in the estate.
The Branched System using PVC pipe diameters of 75 and 50mm proved to be the best
system for this estate based on the WaterCAD results. The assumptions used during the
project design and analysis were outlined to explain any deviations in the results and overall outcome of the project.