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Research Article
Spatiotemporal Analysis of Land Use Changes in the Bongouanou Department (1989-2018)
Issue:
Volume 14, Issue 6, December 2025
Pages:
255-268
Received:
15 October 2025
Accepted:
25 October 2025
Published:
3 December 2025
Abstract: In the Bоngоuаnоu sub-prefeсture, the Rapid population growth and intensified human activities have significantly accelerated agricultural expansion, plaсing substаntial pressure оn lосal land resоurces. This аltеrаtiоn in land cоver, underscores an ongoing agro-environmental dynamic propelled by human activities. The сurrеnt study aims tо assess the effects оf these practices оn lаnd use dynamics within thе Bоngоuanоu Department. Tо aсcоmplish this, а supеrvised clаssifiсаtiоn technique was emplоyed оn satеllite imаgеry саpturеd at three distinct time pоints: 1989, 2002, and 2018. The аnalysis оf lаnd use and land cоver (LULC) indicаtes a nоtable 12.83% reductiоn in naturаl ecоsystems, inсluding watеr bоdiеs, savannahs, and fоrеsted regiоns, juхtapоsеd with a 3.08% increase in anthrоpоgenic land cоver typеs such as сrоpland, fallоw lаnd, bare sоil, and urbanized areаs. The ecological integrity of forested areas has been substantially compromised due to population growth and anthropogenic pressures. These results offer important guidance for land management and support informed decision-making for monitoring and sustainably managing groundwater resources.
Abstract: In the Bоngоuаnоu sub-prefeсture, the Rapid population growth and intensified human activities have significantly accelerated agricultural expansion, plaсing substаntial pressure оn lосal land resоurces. This аltеrаtiоn in land cоver, underscores an ongoing agro-environmental dynamic propelled by human activities. The сurrеnt study aims tо assess t...
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Research Article
Impacts of Pesticide Use on Market Gardening Crops in Mokolo Municipality
Issue:
Volume 14, Issue 6, December 2025
Pages:
269-283
Received:
16 September 2025
Accepted:
23 October 2025
Published:
9 December 2025
Abstract: The study aims to assess the impacts of the use of pesticides in market gardening on crops, human health and the environment in Mokolo, Far North Region of Cameroon. Pesticides use is a common practice to protect crops, driven by personal beliefs and challenges faced by farmers in the area. Although this practice improves yields, it has both positive and negative effects on farmers, crops and the environment. Data for this study was collected through questionnaires administered to 158 farmers and 15 officials from the locality, NGOs and other stakeholders. The questionnaires, structured to assess the impacts of pesticides on crops, the environment, the economy, and health were administered across 13 market gardening sites. Data collected were analyzed using Kobo Collect, Excel, and Quantum Geographic Information System (QGIS) for spatialization. The findings indicate that pesticide use has harmful consequences on farmers, crops health and environment. Pesticides residues on crops was very high as reported by 88.7% on parsley, 59% on celery, and 73.7% on peppers, cabbage, and onions). Health issues reported among farmers was also very high: 88% for respiratory cases and 72% for skin irritations. There was significant financial losses due to high costs of pesticide purchase (80,000 to 90,000 FCFA). The results reveals a gap in effective pesticides use. It also underscores an urgent need of regulations that promote integrated pest management as well as the use of sustainable alternatives (bio-pesticides) to preserve a healthy ecosystem and protect public health.
Abstract: The study aims to assess the impacts of the use of pesticides in market gardening on crops, human health and the environment in Mokolo, Far North Region of Cameroon. Pesticides use is a common practice to protect crops, driven by personal beliefs and challenges faced by farmers in the area. Although this practice improves yields, it has both positi...
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Research Article
Physicochemical Characterization of Surface Waters in the Ono Lagoon Watershed Under Multiple Anthropogenic Pressures, Bonoua (Southeastern Ivory Coast)
Issue:
Volume 14, Issue 6, December 2025
Pages:
284-294
Received:
25 October 2025
Accepted:
4 November 2025
Published:
11 December 2025
DOI:
10.11648/j.ajep.20251406.13
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Abstract: Domestic, industrial, and agricultural pressures are increasingly impacting the Ono Lagoon watershed (Bonoua, Ivory Coast). This study aimed to identify the main sources of pollution and assess the physicochemical quality of surface waters. Twenty-five (25) sites were sampled, and ten (10) parameters were analyzed: pH, temperature, electrical conductivity, nitrate, nitrite, ammonium, orthophosphate, sulfate, potassium, and sodium. Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA), two multivariate statistical methods, revealed moderate mineralization (mean electrical conductivity: 34.8 µS/cm) and significant acidity (mean pH: 5.43), both below World Health Organization (WHO) standards. Orthophosphate concentrations exceeded WHO guidelines at 88% of the sites, indicating substantial agricultural pressure. PCA identified three main gradients: seasonal nitrate leaching, agro-industrial inputs (sulfate, ammonium), and domestic pollution (nitrite, orthophosphate, potassium, sodium). HCA grouped the sites into three distinct clusters, with site S25 showing particularly degraded water quality. These results highlight the complex interactions among different pollution sources and emphasize the importance of regular monitoring of surface waters. They also underscore the need for integrated and targeted management strategies to mitigate the impacts of domestic and agricultural activities on the watershed’s surface waters. In summary, this study provides essential information to guide the protection and sustainable management of water resources in the Ono Lagoon watershed.
Abstract: Domestic, industrial, and agricultural pressures are increasingly impacting the Ono Lagoon watershed (Bonoua, Ivory Coast). This study aimed to identify the main sources of pollution and assess the physicochemical quality of surface waters. Twenty-five (25) sites were sampled, and ten (10) parameters were analyzed: pH, temperature, electrical condu...
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Research Article
Impact of Climate Variability on Hydroelectric Power Production in Guinea: Case of the Kinkon Dam
Issue:
Volume 14, Issue 6, December 2025
Pages:
295-304
Received:
1 November 2025
Accepted:
14 November 2025
Published:
11 December 2025
DOI:
10.11648/j.ajep.20251406.14
Downloads:
Views:
Abstract: In Guinea, analysis of the hydrological balance of recent years shows the severity of the impact of climate variability on the hydrological regimes of rivers. This would impact the productivity of hydroelectric dams. The illustrative case is that of the power plant located upstream of the Kinkon waterfall, on the Kokoulo River in Pita prefecture, built between 1963 and 1966. With an initial production capacity of 3.4 megawatts, Kinkon now produces only 1.6 megawatts, mainly due to the gradual reduction in water flow. The present work, which focuses on the impact of climate variability on the production of hydroelectric energy at the Kinkon power plant, aims to assess the main causes of the drop in energy productivity at this Kinkon power plant. The main data used are the rainfall in the area, the energy production of the power plant, and Landsat satellite images. The method used consists of calculating the monthly rainfall balance of the area as well as the energy productivity to determine the interannual variability. The calculation of anomalies made it possible to visualize the trend and the analysis of the correlation showed the linear dependence of the two variables (rainfall and energy productivity). A supervised classification of Landsat satellite images leading to the extraction of land cover made it possible to better understand the anthropogenic pressure on the area concerned. The results obtained show a downward trend in rainfall in the area, which in turn has led to a decrease in the plant's productivity. This decrease in rainfall is believed to be due to the strong anthropogenic pressure exerted on the environment in the area concerned.
Abstract: In Guinea, analysis of the hydrological balance of recent years shows the severity of the impact of climate variability on the hydrological regimes of rivers. This would impact the productivity of hydroelectric dams. The illustrative case is that of the power plant located upstream of the Kinkon waterfall, on the Kokoulo River in Pita prefecture, b...
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,
Bernard Adiaffi
