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Agriculture is harming its own future through soil degradation and pollution of the water that it generates. The different chemical analyses carried out on surface waters and the land surveys carried out in the Nakanbe basin have shown that agricultural practices contribute to water pollution. The monitoring of nitrate, orthophosphate and BOD5 levels in the dams of Goinre, Ziga and Bagre during the period from August to December revealed that agricultural practices lead to variation in these parameters. The average values for nitrates are 0.833 mg/L in the Goinre fresh waterbody, 1.372 mg/L in the Ziga reservoir, and 1.267 mg/L in the Bagre fresh waterbody. As for ortho phosphate, mean values are 0.357 mg/L in the Goinre reservoir, 0.157 mg/L in the Ziga reservoir and 0.123 mg/L in the Bagre reservoir. These average values are higher than the norms established by Nisbet and Vernaux (1970) for eutrophication. Nitrates and orthophosphate are the elements that contribute to the eutrophication of water surfaces in the Nakanbe basin, although this eutrophication is of low intensity. Of all pesticides encountered in our study sites, 45% are registered by the Sahelian Pesticides Committee (CSP): 35% are non-accredited and 20% are unknown in the global list authorized by the CSP in 2010.

journal of water resource and protection

Assessment of Agricultural and Mining Pollutions of Waterbodies within the Nakanb&amp;#233; Basin (Burkina Faso): The Case of the Goinr&amp;#233;, Ziga and Bagr&amp;#233; Reservoirs