资源环境科技发展态势分析平台

The objectives of this study were to investigate the trend in annual precipitation, sunshine duration, wind speed (u(2)), and annual and monthly minimum temperature (T-min), maximum temperature (T-max), and relative humidity (RH) and the adaptation strategies for the Senegal River Basin. Annual precipitation, Tmin, Tmax, RH, sunshine duration, and u(2) for the period of 1950-2000 recorded at St-Louis, Bakel, Dagana, Fanaye, Podor, and Matam have been analysed using the Mann-Kendall test and Sen's slope estimator. Annual precipitation varied with location from 900mm registered in 1967 at Bakel to 32 mm obtained at Dagana in 1986. A significant decreasing trend (p<0.001) in precipitation was observed at Podor, Dagana, Matam, Bakel, and St-Louis. A non-significant decreasing trend in annual precipitation was observed at Fanaye Dieri. There was a significant increasing trend (p<0.001) in Tmax and Tmin at all locations. Sunshine duration had a significant decreasing trend at Podor, Matam, and St-Louis at the rate of 0.27, 0.28, and 0.35 h decade(-1), respectively. RH and u(2) have differences in their trends, with the first one showing a strong and significant decrease and u(2) with less significance in their trends. The trend analysis in the climate variables revealed a change in climate that necessitates some specific actions for resources management sustainability and conservation.