This research is aimed at designing a wastewater transmission system from storage to
treatment and, eventually to storage in an elevated steel tank. The work includes the
design of a 750,000-litre capacity underground concrete reservoir and a 125,000-litre
capacity elevated steel tank. For the transmission design, field activities involved the
use of Magellan eXplorist 350H North America G.P.S. and Google Earth to
determine coordinates of different points in a selected private university campus,
southwest Nigeria as well as the lowest and the highest elevation points. The highest
point in the university was located at the postgraduate hall of residence, and the
lowest point was located at the schools constructed wetland within the campus.
WaterCAD was used to design the flow path network, while the water storage design
software used for this project are StaadPro.V8i, Orion 18, and AutoCAD 2013.
StaadPro.V8i was employed for the analysis and design of the underground storage
facility and the elevated steel tank, while the Orion software was utilized for concrete
design and detailing of the underground storage facility. The results from all the
design applications were exported to the AutoCAD environment for editing and
proper scaling. This study has revealed that the construction of a 750 m³ underground
storage tank would be highly efficient and economical when compared to a smaller
tank. Also, both the hydrostatic forces acting internally within the underground tank
and active and passive pressure acting externally toward the wall has shown to
possess zero impact on the shear wall
