This study aims to assess the current state of the drinking water supply system in the city of Amtiman, evaluating both its performance indicators and the quality of the distributed water. Following this assessment, a technical proposal is presented, along with a cost estimate for optimization to ensure a continuous drinking water supply to the city’s residents. To this end:
The Epanet software was used to model the network.
The reservoir, performance indicators, and population estimate were determined using an analytical method. The results obtained show that it is necessary to (i) construct an additional 300m3 elevated reinforced concrete reservoir to serve the estimated 69,706 inhabitants in 2044, (ii) extend the water distribution network to 14,816 km, for a total of 20,347 km, and (iii) drill 6 new boreholes capable of pumping at least 40m3/h each, connected by a 140mm diameter HDPE supply pipeline. The total cost of the rehabilitation amounts to 975,798,050 FCFA.
Investigations on the state of potability of the city of Mao water consumption in the Kanem province in Chad were carried out in 2000. Three pieces of information (i) the physico-chemical analysis (ii) the bacteriological analysis and (iii) the piezometric measurements of the water points were crossed. The results show that 25% of the sampled water points have abnormal concentrations of nitrates of iron and ammonium total respectively 55mg / ml, 1.85mg / ml and 0.65mg / ml values that are beyond the limit of the national standard. These abnormal concentrations of chemical elements could have origins linked to human activities. Bacteriological analysis detects fecal coliforms, Escherichia coli, fecal enterococci and total aerobic flora in 35% of the structures sampled and analyzed. Finally, the piezometric measurements show an overall low piezometric level in the city and highlight two piezometric domes in the center of the city which orient the direction of groundwater flow in all directions, converging towards the outskirts of the city.
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