Abstract:
In the commune of Djidja, the intensification of agriculture is an important factor in the use of
pesticides. Research has shown the contamination of the aquatic ecosystem by pesticides in this
environment. The objective of this research is to assess plot risk of contamination of the waters
of the Couffo River by pesticides in the cotton basin of this town. Surveys on agricultural
practices were conducted with 55 producers in three villages (Zakan-kossossa, Fonkpodji and
Aklinmè), all located in the cotton basin. It is also adopted within the framework of this research,
the methods of multi-criteria analysis of decision support. The results showed that, per treated
area, 29.09% of producers applied dose of pesticides higher than that registered, 61.82% of
respondents used a dose of pesticides lower than that recommended and 09.09% of the latter
respected the normal dose. As for the assessment of the plot risk of contamination of the waters
of the Couffo River, it is noted that the type 1 and 2 plots present a medium risk, the type 3 plots
a low risk and those of types 4, 5, 6 and 7 very low risk. It is also essential to assess the risk of
climatic and biogeochemical factors in order to better understand the risk situation for the
sustainable management of this river. |
