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Title

Land use and climate change effects on soil erosion in a semi-arid mountainous watershed (High Atlas, Morocco)

Publication Year

2015

Author(s)
  • Simonneaux, Vincent
  • Cheggour, Aouatif
  • Deschamps, Charles
  • Mouillot, Florent
  • Cerdan, Olivier
  • Le Bissonnais, Yves
Source
JOURNAL OF ARID ENVIRONMENTS Volume: 122 Pages: 64-75 Published: 2015
ISSN
0140-1963 eISSN: 1095-922X
Abstract

The objective of this study was to simulate the evolution of soil erosion in a semi-arid mountainous watershed (225 km(2), High Atlas Mountains, Morocco) under different scenarios of climate and land use change to the end of 21st century. Erosion plots monitored over four years showed spatially contrasted results. Most of the soils produced from 0.015 to 2.5 t ha(-1) y(-1), whereas badlands produced 350 t ha(-1) y(-1). The average sediment yield measured at the outlet during the same period was approximately 4 t ha(-1) y(-1). The STREAM distributed erosion model was parameterized using these field measurements (infiltration rates and runoff sediment concentrations). The results showed an overall agreement between the modelled and measured annual cumulative sediment yields. Simulations of the ARPEGE meteorological model were used for the 1960-1990 and 2070-2100 periods. The changes between these two periods were downscaled using three different methods, decreasing annual precipitations by 10-14%, although with more rainfall in summer and fall. Climate change alone increased sediment yield by 4.7-10.1%. However, simulations showed that land use changes might potentially induce much larger changes in erosion (up to 250%), approximately proportional to the evolution of the extension of badlands. (C) 2015 Elsevier Ltd. All rights reserved.

Author Keyword(s)
  • Erosion plots
  • Erosion modelling
  • Runoff
  • Sediment yield
  • Badlands
  • Climate downscaling
  • Land use change
KeyWord(s) Plus
  • SOUTHEAST SPAIN
  • RUNOFF MODEL
  • CATCHMENT
  • SCALE
  • PRECIPITATION
  • CONNECTIVITY
  • SEDIMENT
  • CONSEQUENCES
  • ENVIRONMENT
  • MANAGEMENT
ESI Discipline(s)
  • Environment/Ecology
Web of Science Category(ies)
  • Ecology
  • Environmental Sciences
Adress(es)

[Simonneaux, Vincent; Deschamps, Charles] UMR CNES CNRS IRD UPS, CESBIO, Ctr Etud Spatiales Biosphere, F-31401 Toulouse 9, France; [Cheggour, Aouatif] Univ Cadi Ayyad, Fac Sci Semlalia, Marrakech 40000, Morocco; [Mouillot, Florent] CEFE CNRS, F-34293 Montpellier 5, France; [Cerdan, Olivier] Bur Rech Geol & Minieres, RNSC RMT, F-45060 Orleans, France; [Le Bissonnais, Yves] INRA, UMR LISAH INRA IRD SupAgro, F-34060 Montpellier, France

Reprint Adress

Simonneaux, V (reprint author), UMR CNES CNRS IRD UPS, CESBIO, Ctr Etud Spatiales Biosphere, 18 Ave Edouard Belin, F-31401 Toulouse 9, France.

Country(ies)
  • France
  • Morocco
CNRS - Adress(es)
  • Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR5175
  • Centre d'études spatiales de la biosphère (CESBIO), UMR5126
Accession Number
WOS:000359170000008
uid:/DTVBJD6G
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