| dc.description.abstract | The management of water resources in our states has become increasingly difficult in recent times because of the frequency and
intensity of droughts. In the context of climate change, extreme weather and climate events such as floods and drought, which are
increasingly occurring, have a negative impact on the socio-economic development of the Senegalese territory. In this study, the
Standardized Precipitation and Evapotranspiration Index (SPEI) was applied to characterize drought conditions in Senegal between 1950 and 2018. The SPEI was calculated from precipitation and temperature data for different periods of time. accumulation. Based
on the SPEI, multi-scale models, trend and spatio-temporal extent of drought were evaluated, respectively. The results explicitly
show a tendency to dry out Senegalese territory. The average SPEI values at five time scales all decreased significantly. Some
moderate and severe droughts were recorded after 2005 and have even been aggravated. In examining the spatio-temporal extent,
the aggravating condition of the drought has been revealed. To study the performance of SPEI, a correlation analysis was performed
between the SPEI and the standardized precipitation index (SPI). The results showed that SPI and SPEI correlations were approximate
and that SPEI could better monitor soil moisture than SPI in months with a significant increase in temperature.
Keywords: standardized index, SPEI, SPI, trend, drought | en_US |
