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 Nakanb...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 Nakanbé basin have shown that agricultural practices contribute to water pollution. The monitoring of nitrate, orthophosphate and BOD5 levels in the dams of Goinré, Ziga and Bagré 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 Goinré fresh waterbody, 1.372 mg/L in the Ziga reservoir, and 1.267 mg/L in the Bagré fresh waterbody. As for ortho phosphate, mean values are 0.357 mg/L in the Goinré reservoir, 0.157 mg/L in the Ziga reservoir and 0.123 mg/L in the Bagré 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 Nakanbé 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.展开更多
Inland waterbody biology is a disciplinary branch of ecology, dealing with the living phenomena of an inland waterbody ecosystem and their interaction with the environment. As freshwater resources constitute a critica...Inland waterbody biology is a disciplinary branch of ecology, dealing with the living phenomena of an inland waterbody ecosystem and their interaction with the environment. As freshwater resources constitute a critical precondition for human survival, the international community invariably places its research focus on the protection of the water environment. Both the theory and the practice of China’s freshwater biological research have reached the advanced level in the world today in terms of the exploitation of inland waterbody biomass production. In the protection of water quality, however, our work apparently lags behind the worldwide level. In line with the current situation in our country, we must respond rapidly by shifting our research priority to the protection of the water environment. Our strategy for the disciplinary development is to protect water quality, giving proper consideration to freshwater fisheries, moderate exploitation and the sustainable utilization of our inland waterbody展开更多
文摘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 Nakanbé basin have shown that agricultural practices contribute to water pollution. The monitoring of nitrate, orthophosphate and BOD5 levels in the dams of Goinré, Ziga and Bagré 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 Goinré fresh waterbody, 1.372 mg/L in the Ziga reservoir, and 1.267 mg/L in the Bagré fresh waterbody. As for ortho phosphate, mean values are 0.357 mg/L in the Goinré reservoir, 0.157 mg/L in the Ziga reservoir and 0.123 mg/L in the Bagré 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 Nakanbé 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.
文摘Inland waterbody biology is a disciplinary branch of ecology, dealing with the living phenomena of an inland waterbody ecosystem and their interaction with the environment. As freshwater resources constitute a critical precondition for human survival, the international community invariably places its research focus on the protection of the water environment. Both the theory and the practice of China’s freshwater biological research have reached the advanced level in the world today in terms of the exploitation of inland waterbody biomass production. In the protection of water quality, however, our work apparently lags behind the worldwide level. In line with the current situation in our country, we must respond rapidly by shifting our research priority to the protection of the water environment. Our strategy for the disciplinary development is to protect water quality, giving proper consideration to freshwater fisheries, moderate exploitation and the sustainable utilization of our inland waterbody
