Physico-chemical and bacteriological characterization of the raw water of kongou pond (Niamey-niger)

The present study was conducted at the Kongou Gorou Zarmagandey pool. The aim of this study is to characterize the waters of this pool through in situ and laboratory measurements of certain physico-chemical and bacteriological parameters. The water samples were taken and analyzed according to the standardized methods of some physico-chemical parameters and bacteriological. These parameters are turbidity, pH, conductivity, temperature, iron, organic matter, color, copper, TDS, hardness, calcium, HCO3, magnesium, total residues, TAC, E. coli, faecal Streptococci, total germs and sulpha-reducers. The results showed that the water of the pool study is cloudy and the parameters studied have the following characteristics: turbidity very high (638NTU), the average values of the electrical conductivity of water show that the pool is weakly mineralized (30, 77 μs.cm-1), a significant number of sulpho-reducing bacteria (116 germs per 2 ml); for faecal streptococci, no individual was found in unrefined water, whereas a high content of suspended elements (0.5 mg.l-1) was found and unrefined water contains 1.3 ° F and 15.86 mg.l-1 of bicarbonate. These results found mean otherwise that the water of the pool is of poor quality and is unfit in pressurized irrigation especially drip to drip irrigation. On the one hand, it is desirable to make people aware of the risks of pollution linked to the excessive use of fertilizers and pesticides around the pool. On the other hand, for this water to be used in drip to drip irrigation system, it is necessary to use a filtering device or clarification of water for irrigation.