Abstract
The Souss-Massa region in southwestern Morocco is characterized by a semi-arid climate with high variability in rainfall. Frequent droughts and flash flood events combined with overexploitation of water resources in recent decades have had a significant impact on the human security and the economy which is mainly based on agriculture, tourism and fishery. For better management of extreme events and water resources under changing climatic conditions, a study was carried out to quantify the seasonal and annual variability and trends in rainfall and temperature over the past three decades with data from three stations. Climatological representative of the Souss-Massa region. The Mann-Kendall (MK) non-parametric test and the Sen’s slope are used to estimate the monotonic trend and magnitude of the trend of the variables, respectively. Statistical analysis of the rainfall series data set highlights that the occurrence of rainfall is unpredictable and irregular and the both the seasonal and annual rainfall trend appears negative (downward) for all the three climatological stations. The minimum temperature shows a remarkable increasing trend both on annual and seasonal scale while the maximum temperature registers a slightly increasing trend. The study presents some new insights on rainfall and temperature trends that will have significant impacts on the surface and groundwater resources of the region under changing climatic conditions. The results can help to prioritize new strategies to mitigate the risk of droughts, of floods and to manage water resources to sustain the dependence of agriculture tourism and fishery sectors in the region. Doi: 10.28991/cej-2021-03091765 Full Text: PDF
Highlights
The impact of climate change on rainfall and air temperature has received much attention by the research community all around the world
We take the rainfall series of the PT station during the autumn season from Table 1, at the significance level of 5%, we got the p-value = 0.571 so, based on the null hypothesis, we have to say that there is no trend at a significance level of 5%
Based on the results of our study, we accept that the Mann-Kendall test and the Sen Slope estimator provide remarkable results on the presentation of the evolution of climate variables in the Souss basin
Summary
The impact of climate change on rainfall and air temperature has received much attention by the research community all around the world. Several studies have been carried out to show these changes in temperature and rainfall are becoming evident on a global scale [1]. Climate change has occurred on a global scale, but its impact often varies from region to region [2]. As proved by numerous studies, climate change has a very strong impact on natural ecosystems, society and economy by affecting the hydrological cycle, which can lead to deficiency of water resources, and overabundance of floods and droughts frequency [3]. There are strong signals of changes in rainfall are already occurring globally and locally [4]
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