[ Analyse spatio-temporelle de la variabilité hydroclimatique dans le bassin arachidier (Sénégal) ]
Volume 83, Issue 1, February 2026, Pages 99–111
Birame Sene1 and Papa Babacar Diop Thioune2
1 Equipe de recherche Biodiversité, Gestion des Ressources Naturelles et Changement Climatique (BIOGERENAT), Université Alioune Diop (UAD), Institut Supérieur de Formation Agricole et Rural (ISFAR), BP 54, Bambey, Senegal
2 Equipe de recherche Biodiversité, Gestion des Ressources Naturelles et Changement Climatique (BIOGERENAT), Université Alioune Diop (UAD), Institut Supérieur de Formation Agricole et Rural (ISFAR), BP 54, Bambey, Senegal
Original language: French
Copyright © 2026 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.
Issues related to climate change are now at the heart of high-level scientific debates in the hope of identifying vulnerable areas. Among Senegal’s agroecological zones is the peanut basin the main area for growing peanuts and dry cereals, which is exposed to climate variability. Understanding the spatial and temporal variability of temperatures and precipitations, as well as characterizing their trends, is crucial to grasping the significance of climate change and its impacts on agroecological areas. To understand the diachronic evolution of temperatures and precipitation in the Peanut Basin, the research methodology was structured around the standardized precipitation index, the spatialization of maximum temperatures, the identification of thermal anomalies by applying the Lamb index, the detection of trends using the Mann Kendall test and the Sen slope following an established time step from 1981 to 2024. This reveals that in the Peanut Basin, on an annual scale, the distribution of maximum temperatures fluctuates between 35°C and 45 °C. However, the variation in average maximum (Tmax) and minimum (Tmin) temperatures indicates a more significant increase in minimum temperatures associated with a positive Sen slope at the Fatick, Kaolack, and Koungheul stations, confirming the hypothesis of the warming hypothesis in the central-south where the resumption of wet stages follows essentially dry occurrences with average annual rainfall oscillating between 509.62 mm (Thiès) and 715.27 mm (Koungheul).
Author Keywords: Variability, Temperatures, anomalies, Trend, Mann Kendall Test, Peanut Basin.
Volume 83, Issue 1, February 2026, Pages 99–111
Birame Sene1 and Papa Babacar Diop Thioune2
1 Equipe de recherche Biodiversité, Gestion des Ressources Naturelles et Changement Climatique (BIOGERENAT), Université Alioune Diop (UAD), Institut Supérieur de Formation Agricole et Rural (ISFAR), BP 54, Bambey, Senegal
2 Equipe de recherche Biodiversité, Gestion des Ressources Naturelles et Changement Climatique (BIOGERENAT), Université Alioune Diop (UAD), Institut Supérieur de Formation Agricole et Rural (ISFAR), BP 54, Bambey, Senegal
Original language: French
Copyright © 2026 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
Issues related to climate change are now at the heart of high-level scientific debates in the hope of identifying vulnerable areas. Among Senegal’s agroecological zones is the peanut basin the main area for growing peanuts and dry cereals, which is exposed to climate variability. Understanding the spatial and temporal variability of temperatures and precipitations, as well as characterizing their trends, is crucial to grasping the significance of climate change and its impacts on agroecological areas. To understand the diachronic evolution of temperatures and precipitation in the Peanut Basin, the research methodology was structured around the standardized precipitation index, the spatialization of maximum temperatures, the identification of thermal anomalies by applying the Lamb index, the detection of trends using the Mann Kendall test and the Sen slope following an established time step from 1981 to 2024. This reveals that in the Peanut Basin, on an annual scale, the distribution of maximum temperatures fluctuates between 35°C and 45 °C. However, the variation in average maximum (Tmax) and minimum (Tmin) temperatures indicates a more significant increase in minimum temperatures associated with a positive Sen slope at the Fatick, Kaolack, and Koungheul stations, confirming the hypothesis of the warming hypothesis in the central-south where the resumption of wet stages follows essentially dry occurrences with average annual rainfall oscillating between 509.62 mm (Thiès) and 715.27 mm (Koungheul).
Author Keywords: Variability, Temperatures, anomalies, Trend, Mann Kendall Test, Peanut Basin.
Abstract: (french)
Les questions inhérentes au changement climatique sont aujourd’hui placées au cœur des débats scientifiques de haute facture dans l’espoir de détecter les zones vulnérables. Parmi les zones agroécologiques du Sénégal figure le bassin arachidier principale zone de culture de l’arachide et des céréalières sèches exposée à la variabilité climatique. La compréhension de la variabilité spatio-temporelle des températures et précipitations au même titre que la caractérisation de leur tendance relève d’une approche déterminante dans l’optique de saisir l’importance du changement climatique et ses impacts au niveau des espaces agroécologiques. Pour saisir l’évolution diachronique des températures et des précipitations dans le Bassin Arachidier, la méthodologie de recherche s’est structurée autour de l’indice standardisé des précipitations, la spatialisation des températures maximales, l’identification des anomalies thermiques par l’application de l’indice de Lamb, la détection des tendances par le test de Mann Kendall et la pente de Sen suivant un pas de temps établi de 1981 à 2024. Il en ressort ainsi dans le Bassin Arachidier à l’échelle annuelle, une répartition des températures maximales oscillant entre 35 °C et 45 °C. La variation de la moyenne des températures maximales (Tmax) et minimales (Tmin) indique toutefois une augmentation plus significative des températures minimales associées à une pente de Sen positive au niveau des stations de Fatick, Kaolack, Koungheul matérialisant l’hypothèse du réchauffement dans le centre-sud où la reprise des phases humides succède sensiblement aux occurrences sèches avec des précipitations moyennes annuelles oscillant entre 509,62 mm (Thiès) et 715,27 mm (Koungheul).
Author Keywords: Variabilité, Températures, Anomalies, Tendance, Test de Mann Kendall, Bassin Arachidier.
How to Cite this Article
Birame Sene and Papa Babacar Diop Thioune, “Spatio-temporal analysis of hydroclimatic variability in the peanut basin (Senegal),” International Journal of Innovation and Scientific Research, vol. 83, no. 1, pp. 99–111, February 2026.
