期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：7
页码：2023-2031
出版社：University of Mohammed Premier Oujda
摘要：The analysis of the spatial and temporal inter-annual variability of Souss-Massaprecipitation is the main objective of this work. The spatial distribution of precipitation inthe region during 1980-2010 shows that rainfall follows a gradient from the North to theSouth and from the West to the East. We study the influence of altitude and distance to theAtlantic Ocean on annual precipitation using the Principal Component Analysis. Theregional precipitation increases with high altitude and decrease with low distances to thesea. We distinguish three clusters of stations with the same rainfall behaviour, stationslocated in the plains, in the mountains and the most distant stations from the AtlanticOcean. The evolution of the standardized precipitation index during 1980-2010 shows thatthe wet years represent 16% and the dry years represent 35% of the studied period. Nostatistically significant trend is detected during 1980-2010 for all the stations according tothe results of the Mann-Kendall test. Change-points analyses show no statisticallysignificant change-point according to Buishand test, Pettitt test and the Hubertsegmentation. The results of continuous wavelet analysis show multiple significant highenergy bands (p=0.05) for the periods of 1 year, (2-4) years, (3-5) years and (5-10) yearsin most stations, with the persistence of continuous high energy bands of 8 to 9 yearsaround the period 1990-2002. The wavelet coherency analysis indicates a significant antiphasebetween the NAO and the regional SPI during 1980-2010.
