Variabilité journalière de la qualité physico-chimique du lac M’koa de Jacqueville (Côte d’Ivoire)

Abstract

The daily variability of the physicochemical quality of M'koa Lake of Jacqueville depends on biotic and abiotic factors of the flowing water that can interact with each other. The objective of the study is to evaluate the influence of these factors on the variability of physicochemical quality by continuous sampling. This variability of M'koa Lake was studied during daily 24-hour cycles on average in june and august 2014. Insitu measurements and chemical analyzes of 24-hours continuous sampling samples of the lake station were conducted. For each of the two study periods, the results varied from 6.07 to 8.08 and 6.47 to 8.17 for the pH, 27.83 to 28.33 °C and 26.75 to 28.60 °C for the temperature, from 59.30 to 113.90% and 55.95 to 87.34% for dissolved oxygen saturation and from 77.97 to 229.27 mgO 2 /L and 23.33 to 176.22 mgO 2 /L for the chemical oxygen demand in june and august, respectively. Daily variability with gap of dissolved oxygen of 54.60% and 31.40% in june and august are noted, respectively. In fact, the magnitude of these differences reflects the H. Y. KPIDI et al. / Int. J. Biol. Chem. Sci. 11(2): 901-910, 2017 902 dependence of the dissolved oxygen contents on the intensity of a possible algal proliferation and biomass mineralization and thus characteristic of the degraded physicochemical quality of Jacqueville M'koa Lake.

Anionic Surfactants Levels in M’Koa Lake Water (Jacqueville, Côte d’Ivoire)

“…M'koa Lake is characterized by low mineralization, so low values of transparency and turbidity may could be due to the presence of organic matter in M'koa Lake. The presence of organic matter would be favored by wastewater discharges and direct human activities around Lake M'koa [10] [16].…”

Assessment of the hygienic quality of groundwater for drinking and domestic use in the peri-urban villages of the municipality of Jacqueville in Cte dIvoire

“…Its tectonic structure is marked by a satellite fault parallel to the major fault (the lagoon fault) of the entire Ivorian sedimentary basin (Tastet and Guiral, 1994). The climate is transitional equatorial, with four seasons (Kpidi, 2017). In the coastal sedimentary basin, there are three important reservoirs in terms of hydrogeology, namely the Quaternary aquifer, the Terminal Continental aquifer of Mio-Pliocene age and the Maestrichtian aquifer (Aghui and Biemi, 1984).…”

Monitoring and Modeling of Chlorophyll-a Dynamics in a Eutrophic Lake: M'koa Lake (Jacqueville, Ivory Coast)

“…A shallow natural lake with a maximum depth of 3.9 m and an area of about 0.180 km 2 , Lake M'koa, in the subequatorial Attiean climate, is maintained by infiltration [10]. …”

“…These different physico-chemical descriptors were determined by kpidi et al [10]. The modeling was done by using the multilinear and nonlinear regression method implemented in Excel spreadsheets [20] and XLSTAT version 2014 [21].…”

“…Indeed, the solubility of oxygen in water is inversely proportional to its temperature. The temperature (25 to 30°C average in our tropics), the concentration of dissolved oxygen and organic matter are physico-chemical factors that govern a lot of chemical and biological processes taking place in water [10]. The existence of various activities on the watershed can contribute to the degradation of the quality of its aquatic system [11].…”