[ Etude des facteurs influençant la contamination des ressources en eau en milieu agricole dans le département d’Agboville (Sud-Est de la Côte d’Ivoire) ]
Kotchi Rodrigue OROU1, Zahibo Oscar ONETIE2, and Dotanhan YEO3
1 UFR Agriculture, Ressources Halieutiques et Agro-Industries (UFR-ARHAI), Université de San-Pedro, BP 1800 San-Pedro, San-Pedro, Côte d’Ivoire
2 Département Géosciences, UFR des Sciences Biologiques, Université Péléforo Gon COULIBALY (UPGC), BP 1328 Korhogo, Côte d’Ivoire
3 UFR Agriculture, Ressources Halieutiques et Agro-Industries (UFR-ARHAI), Université de San-Pedro, BP 1800 San-Pedro, San-Pedro, Côte d’Ivoire
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The increase in agricultural production is accompanied by a growth in the use of plant protection products, with inappropriate use of doses and frequency of treatment, leading to negative effects on the environment and human health. The aim of this study is to identify the parameters that contribute to the deterioration of surface and groundwater quality in agricultural environments in the department of Agboville. The methodology involved studying the relationships between chemical elements indicative of agricultural contamination and pesticide residues measured in the water sampled. The results show that more than half (52%) of the water points sampled were surface water and 48% were groundwater. In the rainy season, 68% of water points have an NO3- concentration > 10 mg/L and in the dry season, 85% of water points have an NO3- concentration > 10 mg/L. Nitrates come mainly from leaching from agricultural land and the decomposition of organic matter. High concentrations of herbicides (glyphosate: 0,52 µg/L and glyphosate isopropylamine salt: 0,30 µg/L) were detected in water from rubber plantations and rice fields, while high levels of insecticides (deltamethrin: 0,3 µg/L and chlorpyrifos-ethyl: 0,4 µg/L) were observed in water from market gardens. Water points located inside and/or near old plantations (over 15 years old) are the most contaminated. Surface water is more contaminated than groundwater, and contamination is greater in the rainy season than in the dry season.
Author Keywords: factors, contamination, water, agriculture, Agboville.
Kotchi Rodrigue OROU1, Zahibo Oscar ONETIE2, and Dotanhan YEO3
1 UFR Agriculture, Ressources Halieutiques et Agro-Industries (UFR-ARHAI), Université de San-Pedro, BP 1800 San-Pedro, San-Pedro, Côte d’Ivoire
2 Département Géosciences, UFR des Sciences Biologiques, Université Péléforo Gon COULIBALY (UPGC), BP 1328 Korhogo, Côte d’Ivoire
3 UFR Agriculture, Ressources Halieutiques et Agro-Industries (UFR-ARHAI), Université de San-Pedro, BP 1800 San-Pedro, San-Pedro, Côte d’Ivoire
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The increase in agricultural production is accompanied by a growth in the use of plant protection products, with inappropriate use of doses and frequency of treatment, leading to negative effects on the environment and human health. The aim of this study is to identify the parameters that contribute to the deterioration of surface and groundwater quality in agricultural environments in the department of Agboville. The methodology involved studying the relationships between chemical elements indicative of agricultural contamination and pesticide residues measured in the water sampled. The results show that more than half (52%) of the water points sampled were surface water and 48% were groundwater. In the rainy season, 68% of water points have an NO3- concentration > 10 mg/L and in the dry season, 85% of water points have an NO3- concentration > 10 mg/L. Nitrates come mainly from leaching from agricultural land and the decomposition of organic matter. High concentrations of herbicides (glyphosate: 0,52 µg/L and glyphosate isopropylamine salt: 0,30 µg/L) were detected in water from rubber plantations and rice fields, while high levels of insecticides (deltamethrin: 0,3 µg/L and chlorpyrifos-ethyl: 0,4 µg/L) were observed in water from market gardens. Water points located inside and/or near old plantations (over 15 years old) are the most contaminated. Surface water is more contaminated than groundwater, and contamination is greater in the rainy season than in the dry season.
Author Keywords: factors, contamination, water, agriculture, Agboville.
Abstract: (french)
L’augmentation de la production agricole s’accompagne d’une croissance de l’utilisation de produits phytosanitaires avec un usage inadapté des doses et des fréquences de traitement engendrant des effets négatifs sur l’environnement et la santé humaine. Ce travail vise à identifier les paramètres qui contribuent à la dégradation de la qualité des eaux de surface et souterraines en milieu agricole dans le département d’Agboville. La méthodologie se rapporte à l’étude des rapports entre les éléments chimiques indicateurs d’une contamination agricole et les résidus de pesticides dosés dans les eaux échantillonnées. Les résultats montrent que plus de la moitié (52%) des points d’eau échantillonnés sont des eaux de surface et 48% des points d’eau sont des eaux souterraines. En saison pluvieuse, 68% des points d’eau ont une concentration en NO3- > 10 mg/L et en saison sèche, 85% des points d’eau ont une concentration en NO3- > 10 mg/L. Les nitrates proviennent essentiellement du lessivage des terres agricoles et de la décomposition de la matière organique. Les fortes concentrations d’herbicides (glyphosate: 0,52 µg/L et du glyphosate sel d’isopropylamine: 0,30 µg/L) ont été détectées dans les eaux des plantations d’hévéa et dans les rizières; quant aux fortes teneurs d’insecticides (deltamethrine: 0,3 µg/L et chlorpyrifos-éthyl: 0,4 µg/L) ont été observées dans les eaux des maraîchages. Les points d’eau situés à l’intérieur et/ou à proximité des vieilles plantations (plus de 15 ans) sont les plus contaminées. Les eaux de surface sont contaminées que les eaux souterraines et la contamination est plus importante en saison pluvieuse qu’en saison sèche.
Author Keywords: facteurs, contamination, eaux, agriculture, Agboville.
