Our work focuses on the assessment of trends,erosion states and causal risk factors for soil erosion of the Asfalou watershed through the use of the Priority Actions Program/Regional Activity Center(PAP/RAC).This qualitative study model for water erosion makes it possible to assess susceptibility and determine potential fragile areas in order to diagnose the state of soil degradation.We adopted the PAP/RAC crossed matrices,the geographic information system(GIS)and remote sensing(RS)to develop the classical modelling.This method is based on three main approaches:predictive,descriptive and integration.Introducing soil types,slope length(LS)and climatic factors into our model,including rainfall erosivity(R),slope exposure,soil moisture index(SMI)and land surface temperature(LST),improved the reli-ability of our model.The correlation analysis identified these factors that explain erosion states and the risk of soil erosion.The coefficients of determination(R2)of the various erosive states resulting from the modified PAP/RAC approach explain respectively 98.30％,77％and 49.3％of the observed variability of the erosive states.These factors provide information on the current state of soil degradation depending on the degree of influence of the different factors that control erosion.The descriptive approach has shown that soil loss manifests itself in different forms,whether for sheet erosion(L)and ravines(C1)succes-sively affecting 79.95％and 17.84％of the land.The integration approach identifies factors and areas requiring intervention to counter the effects of soil erosion in the Asfalou watershed effectively and sustainably.

Jad Tahouri;Abdelhamid Sadiki;L'houcine Karrat;Verner Carl Johnson;Ngai weng Chan;Zhang Fei;Hsiang Te Kung

Département des Sciences de la Terre,Université Sidi Mohammed Ben Abdellah,Faculté des Sciences Dhar Mahraz,Laboratoire de Géosciences,Environnement et Ressources Associées(LGERA),B.P.1796,Fès,Atlas,Morocco;International Association of Seismology and Physics of the Earth's Interior(IASPEI),Japan;Department of Physical and Environmental Sciences,Colorado Mesa University,Grand Junction,CO,81501,USA;School of Humanities,University Sains Malaysia,11800,Penang,Malaysia;Resources and Environment Department,Xinjiang University,Urumqi,830046,People's Republic of China;Key Laboratory of Oasis Ecology,Ministry of Education,Xinjiang University,Urumqi,830046,People's Republic of China;Key Laboratory of Xinjiang Wisdom City and Environment Modeling,Urumqi,830046,People's Republic of China;Departments of Earth Sciences,The University of Memphis,Memphis,TN,38152,USA

国际水土保持研究（英文）

[1]Jad Tahouri;Abdelhamid Sadiki;L'houcine Karrat;Verner Carl Johnson;Ngai weng Chan;Zhang Fei;Hsiang Te Kung-.Using a modified PAP/RAC model and GIS-for mapping water erosion and causal risk factors:Case study of the Asfalou watershed,Morocco)[J].国际水土保持研究（英文）,2022(02):254-272

Asfalou,erosivity,ravines

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