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Mapping changes in land use/land cover and prediction of future extension of bowé in Benin, West Africa

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  • Padonou, Elie A.
  • Lykke, Anne M.
  • Bachmann, Yvonne
  • Idohou, Rodrigue
  • Sinsin, Brice

Abstract

Desertification and land degradation are worldwide problems affecting soil, vegetation and the livelihoods of rural populations. Bowal (plural bowé) is a particular form of degraded land that occurs in tropical regions and leads to the exposure of ferricretes, which are unsuitable for farming. Bowé are more common on farmland and degraded savanna. Changes in land use/land cover were used to map a region of 6.7 million ha in northern Benin, West Africa in 1975, 1990 and 2010. The changes observed during these periods (1975–1990, 1990–2010 and 1975–2010) were used to predict the occurrence of bowé in the period up to 2050 using Markovian chain analysis. The results showed a considerable change in land use/land cover during the three periods. The types of land on which bowé occur (farmland and degraded savanna) increased in northern Benin by 5.4% per year during the period 1975–1990 and 9.5% per year during the periods 1990–2010, while the natural vegetation (forest, woodland and tree savanna) decreased by the same amount. The future scenarios also predicted the same trend. In the period 1975–1990, 1.28 million ha (26%) of natural vegetation was converted to degraded savanna and farmland while 2.23 million ha (53%) of natural vegetation was converted to degraded savanna and farmland in the period 1990–2010. Based on the dynamics recorded during the period 1975–1990 and 1990–2010 respectively, a total of 1.28 million ha (26% of the natural vegetation that was present in 1975) and 1.29 million ha (31% of the natural vegetation that was present in 1990) will be converted to farmland and degraded savanna in the study area by 2050.Thus bowalization will persist and increase in the period up to 2050. The natural vegetation could disappear if protection and restoration measures are not taken. It is thus important to take measures to stop the degradation and to implement programs to restore soils on bowé based on the soil and water conservation techniques used on highly degraded West African soils, such as zaï pit and stone rows with grass strips. Some native plants species adapted to bowalization and resistant to climate change in northern Benin (e.g. Asparagus africanus, Andropogon pseudapricus and Combretum nigricans) should be used in association with soil and water conservation techniques on bowé.

Suggested Citation

  • Padonou, Elie A. & Lykke, Anne M. & Bachmann, Yvonne & Idohou, Rodrigue & Sinsin, Brice, 2017. "Mapping changes in land use/land cover and prediction of future extension of bowé in Benin, West Africa," Land Use Policy, Elsevier, vol. 69(C), pages 85-92.
  • Handle: RePEc:eee:lauspo:v:69:y:2017:i:c:p:85-92
    DOI: 10.1016/j.landusepol.2017.09.015
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    Citations

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    Cited by:

    1. Padonou, Elie Antoine & Gbaï, N. Innocent & Kolawolé, Moustapha Arèmou & Idohou, Rodrigue & Toyi, Mireille, 2021. "How far are mangrove ecosystems in Benin (West Africa) conserved by the Ramsar Convention?," Land Use Policy, Elsevier, vol. 108(C).
    2. Liu, Shuchang & Xiao, Wu & Ye, Yanmei & He, Tingting & Luo, Heng, 2023. "Rural residential land expansion and its impacts on cultivated land in China between 1990 and 2020," Land Use Policy, Elsevier, vol. 132(C).
    3. James Ellison & Katja Brinkmann & Rodrigue V. Cao Diogo & Andreas Buerkert, 2022. "Land cover transitions and effects of transhumance on available forage biomass of rangelands in Benin," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 24(10), pages 12276-12310, October.
    4. Cunha, Elias Rodrigues da & Santos, Celso Augusto Guimarães & Silva, Richarde Marques da & Bacani, Vitor Matheus & Pott, Arnildo, 2021. "Future scenarios based on a CA-Markov land use and land cover simulation model for a tropical humid basin in the Cerrado/Atlantic forest ecotone of Brazil," Land Use Policy, Elsevier, vol. 101(C).

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