The Davo River, an affluent of the Sassandra River, like other rivers in Côte d’Ivoire, is subject to anthropogenic activities likely to deteriorate its quality which could affect its use as drinking water ...The Davo River, an affluent of the Sassandra River, like other rivers in Côte d’Ivoire, is subject to anthropogenic activities likely to deteriorate its quality which could affect its use as drinking water and also the health of aquatic organisms. This study aims at monitoring the temporal evolution of the physico-chemical quality of the waters of the Davo River at the Dakpadou hydrometric station. Twelve monthly field missions were carried out to sample water, measure temperature, pH, Electrical Conductivity and analyse turbidity, Suspended solids, major elements (Cl<sup>-</sup>, NO<sub>3</sub><sup>-</sup>,HCO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2</sup><sup>-</sup><sup></sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Na<sup>+</sup>, and K<sup>+</sup>) and Trace Metallic Elements (Hg, Fe, Cu, Cr, and Pb). Results show that the waters of the Davo river are poorly mineralized. They are also acidic during periods of low water and slightly basic during flooding periods. The average turbidity value of 10.18 NTU places these waters in the slightly turbid class. The waters have calcic bicarbonate facies during low water periods and sodium bicarbonate facies with low concentrations of major elements during flood months. The average TME concentrations of the Davo river indicate that the waters are not harmful for the health of the population and the aquatic environment.展开更多
Davos,Switzerland,an alpine town and a winter sports resort,has become famous for hosting the World Economic Forum(WEF) annual meetings each winter for the past 36 years.Dalian,China,a northeastern port city。
China’s interests and future are closely linked to those of the world,and it wishes to work with all countries for common development and a community with a shared future for mankind,Chinese Vice President Wang Qisha...China’s interests and future are closely linked to those of the world,and it wishes to work with all countries for common development and a community with a shared future for mankind,Chinese Vice President Wang Qishan said at the 2019 World Economic Forum(WEF)in Davos,Switzerland on January 23.展开更多
文摘The Davo River, an affluent of the Sassandra River, like other rivers in Côte d’Ivoire, is subject to anthropogenic activities likely to deteriorate its quality which could affect its use as drinking water and also the health of aquatic organisms. This study aims at monitoring the temporal evolution of the physico-chemical quality of the waters of the Davo River at the Dakpadou hydrometric station. Twelve monthly field missions were carried out to sample water, measure temperature, pH, Electrical Conductivity and analyse turbidity, Suspended solids, major elements (Cl<sup>-</sup>, NO<sub>3</sub><sup>-</sup>,HCO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2</sup><sup>-</sup><sup></sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Na<sup>+</sup>, and K<sup>+</sup>) and Trace Metallic Elements (Hg, Fe, Cu, Cr, and Pb). Results show that the waters of the Davo river are poorly mineralized. They are also acidic during periods of low water and slightly basic during flooding periods. The average turbidity value of 10.18 NTU places these waters in the slightly turbid class. The waters have calcic bicarbonate facies during low water periods and sodium bicarbonate facies with low concentrations of major elements during flood months. The average TME concentrations of the Davo river indicate that the waters are not harmful for the health of the population and the aquatic environment.
文摘Davos,Switzerland,an alpine town and a winter sports resort,has become famous for hosting the World Economic Forum(WEF) annual meetings each winter for the past 36 years.Dalian,China,a northeastern port city。
文摘China’s interests and future are closely linked to those of the world,and it wishes to work with all countries for common development and a community with a shared future for mankind,Chinese Vice President Wang Qishan said at the 2019 World Economic Forum(WEF)in Davos,Switzerland on January 23.
