Abstract
Ndé Division in West-Cameroon is facing with water supply although many attempts of restoring existing SCANWATER facilities by Bangangté Municipality. In order to address the issue, we assess the exploitable pumping flow rate of catchment aquifers and its hydraulic properties by using Jacob and Theis method, and define protection zones with Hoffman and Lillich method. It emerges that the hydraulic conductivity of aquifer is in the order of 10-4 m/sec, transmissivity varies from 10-4 to 10-6 m2/sec. Aquifer pumping flow rate (Q) varies between 1.5 and 10.5 m3/h. In volcanic rocks, aquifer is more productive (4.5 ≤ Q ≤ 10.5 m3/h). Transfer time of pollutants to aquifer varies from 3 to 56 days depending on rock-types and groundwater slope (0.03 - 0.13 m/m). Furthermore, 113,624 m and 1123 m are radius to be implemented for a better protection of groundwater against any form of pollutant.
Highlights
In order to address the issue, we assess the exploitable pumping flow rate of catchment aquifers and its hydraulic properties by using Jacob and Theis method, and define protection zones with Hoffman and Lillich method. It emerges that the hydraulic conductivity of aquifer is in the order of 10−4 m/sec, transmissivity varies from 10−4 to 10−6 m2/sec
From April to December; actual evapotranspiration is equal to potential evapotranspiration. ● The basement aquifer of Ndé division has, on the one hand, a high productivity on volcanic formations (4.5 ≤ Q ≤ 10.5 m3/h), but on the other hand has a very low productivity in metamorphic formations (Q ≤ 1.5 m3/h)
Hydraulic conductivity of aquifer is in order of 10−4 m/sec and transmissivity varies from 10−4 to 10−6 m2/sec
Summary
Ndé Division was among the selected area where facilities called “SCANWATER” were built in 9 villages (Toukouop, Batchingou, Sanki, Bandiangseu, Bangoulap, Bahouoc, Bangoua, Kamna and Bamena) Despite these water facilities, population is still facing to drinking water access, many attempts of rehabilitation (three reasons motivated the restoration of these water supply networks): 1) All equipments of these water supply networks are still existing but poorly maintained due to lack of trained technician during project implementation ten years ago; 2) The privilege has been focused primarily on defective water supply network and 3) The geological context of the rural city of Bangangté and the former productivity of the catchment borehole because only 33% of them are running and (in 2020, three villages amongst the nine, have their network still nonfunctional, Kamna, Bangoua and Bahouoc) drinking water access rate remains low (
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