History and Projection of Hydrological Droughts in the Benin Basin of the Niger River (Benin)

作     者：Yarou Halissou Alamou Adéchina Eric Biao Iboukoun Eliézer Obada Ezéchiel Tore Daniel Bio Afouda Abel 

作者机构：International Chair of Mathematical Physics and Applications(ICMPA-UNESCO CHAIRE)University of Abom­ey-Calavi(UAC)CotonouBenin National School of Public Works(ENSTP)National University of SciencesTechnologiesEngineering and Mathe­matics(UNSTIM)AbomeyBenin National School of Mathematical Engineering and Modeling(ENSGMM)National University of SciencesTech­nologiesEngineering and Mathematics(UNSTIM)AbomeyBenin Laboratory of Environmental Geoscience and Application(LaGEA/UNSTIM)Benin Applied Hydrology Laboratory(LHA)University of Abomey-Calavi(UAC)CotonouBP4521Benin West African Science Service Center on Climate Change and Adapted Land Use(WASCAL)GRP Climate Change and Water ResourcesUniversity of Abomey-Calavi(UAC)Abomey-CalaviBP2008Benin 

出 版 物：《Journal of Atmospheric Science Research》 (大气科学研究（英文）)

年 卷 期：2022年第5卷第2期

页      面：33-51页

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

主　　题：Hydrological Drought SDI Beninese Niger river basin 

摘      要：In the context of a changing climate,the Beninese Niger River basin has been the focus of several research studies for the quantification,planning,and modeling of water and related resources for sustainable *** re­search aims to characterize the historical(1976-2019)and projected(2021-2050)hydrological drought of the Beninese Niger River *** study used daily observations of rainfall,maximum and minimum temperatures,runoff rates and simulations of HIRHAM and REMO RCMs from fifteen(15)rainfall stations installed around the *** uses standardized stream­flow indices(SDI)at 12-month and 36-month time *** results show that the calculated SDI indices show,on average,for all the model scenar­ios used,chronological trends of *** increases are not signifi­cant(are of the order of 0.00001 per year).The analysis of the SDI indices shows that,on average,the hydrological droughts in the Beninese basin of the Niger River will increase at 36 months and decrease at 12 months of the *** fact,these small variations of hydrological droughts will be ac­companied by the increase of their duration and the decrease of their mag­*** droughts detected in the Benin basin of the Niger River during the historical period will continue until 2050 in the same range but with more extended drought *** should be noted that most of the changes observed in the calculated and analyzed indices are not significant.