Project Name:
EU Water Supply and Sanitation Sector Reform Programme (WSSSRP) Phase III – Water Supply Works in Adamawa State (Lot 2): Detailed Design of Water Supply Works in Adamawa State, NigeriaDate:
2017-2018Country:
Federal Republic of NigeriaClient:
Ministry of Water Resources / MP Infrastructure Ltd/ European UnionPartner:
JOAT Consulting (Pty) Ltd, Durban, Republic of South Africa
Project Description
The Ministry of Water Resources, Nigeria, carried out a preliminary design of the water supply systems of Gella (LGA Mubi South), whose aim was threefold:
- Defining the water demand and the main features of the future system;
- Defining the minimum requirements in terms of capacities to be created.
- Giving guidance to the Contractors for a reasonable cost assessment.
Based on the findings of the preliminary report, the water supply system for Gella Town was conceived to supply water to the residents of the town. The various components of the water supply system were identified, and a preliminary design was carried out that facilitated tendering of the tendering of the construction works. However, the contractor was required to first carry out a detailed study before the implementation of the approved results. This detailed study was to be based on the outputs of an uncalibrated hydraulic model that was to be developed using an appropriate software. The preliminary design fixed the following key parameters that were to be used in the detailed study without modifications:
- Population figures as provided in the preliminary design.
- Water Demand (average daily, peak daily, peak hourly) and Non-Revenue Water;
- Number of boreholes;
- Storage Volume;
- Maximum pipe diameter of the primary distribution network (this means that the maximum diameter of the primary distribution network of the model shall not exceed that of the preliminary design.
The development of the model took into account the above aspects and ensured that the results met the requirements set. This model was developed using Water Distribution Analysis and Design Software (WaterCAD), which formed the basis for the detailed design. The detailed design report was prepared in two volumes, where Vol A presents the Design Report and the Bill of Quantities with key outputs of the hydraulic model presented in the annexes. Vol. B is the Book of Drawings presenting the Pipeline Profiles and Drawings of the proposed Structures for construction.
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