This study aims at determining the impact on water, agriculture and the environment of the soil constituents exported by the Mewou river on the southern Mifi through modeling of the changes in the river flow and in the exported physico-chemical constituents and to identify mitigate strategies. The average exported soils varied in t/km2 from 195.34 in 2011 to 256.02 in 2012. The flow variation of water and chemical constituents were each characterized by a general equation with a model:
Y = a*t9+b*t8+c*t7+d*t6+e*t5+f*t4+g*t3+h*t2+i*t+j
Environmental pollution was identified by water turbidity, 146.9 NTU, and in mg/l Organic matter 2.33, Cd2+ 11, Pb2+ 48.20, NH4+ 2.8, PT 0.84, Al3+ 0.593, NO2- 4.645. It is recommended that to mitigate soil loss, pollution and increase recharge of water table, the use of Vetiver (Chrysopogon zizanioides) hedges and by installation of wastewater treatment plants by each industry and the Municipal council for the household wastes.
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