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Evaluating land degradation by gully erosion through soil erosion indices and rainfall thresholds

Author

Listed:
  • Narges Kariminejad

    (Shiraz University)

  • Hamid Reza Pourghasemi

    (Shiraz University)

  • Mohsen Hosseinalizadeh

    (Gorgan University of Agricultural Sciences and Natural Resources)

  • Mauro Rossi

    (Research Institute for Geo-hydrological Protection)

  • Alessandro Mondini

    (Research Institute for Applied Mathematics and Information Technologies)

Abstract

Among the land degradation processes, gully erosion is the one that poses more environmental and societal challenges in arid regions. Predicting spatiotemporal gully development in a region under changing conditions is important to adopt proper mitigation measures. Here we investigate the Ghapan-Olya watershed in Golestan province in Iran, which is affected by many erosional landforms, including gully phenomena. We apply the pixel-based distributed LANDPLANER model to predict where rainfall induced gullies will occur by exploiting input maps including UAV data, the region soil, and seasonal land use information. We compare our topographic thresholds and an erosion index with field observations through the application of quantitative metrics such as sensitivity, specificity, fallout, precision, and recall. Our study reveals that the spatial density of the gully’s location is more frequently predicted in the areas with an altitude of about 200–300 m, steep slope (between 15 and 30 degrees), and low average accumulation value (

Suggested Citation

  • Narges Kariminejad & Hamid Reza Pourghasemi & Mohsen Hosseinalizadeh & Mauro Rossi & Alessandro Mondini, 2023. "Evaluating land degradation by gully erosion through soil erosion indices and rainfall thresholds," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 117(3), pages 3353-3369, July.
    • Handle: RePEc:spr:nathaz:v:117:y:2023:i:3:d:10.1007_s11069-023-05990-3
    DOI: 10.1007/s11069-023-05990-3
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    References listed on IDEAS

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    1. M. Rossi & D. Torri & E. Santi, 2015. "Bias in topographic thresholds for gully heads," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 79(1), pages 51-69, November.
    2. Subodh Chandra Pal & Rabin Chakrabortty & Alireza Arabameri & M. Santosh & Asish Saha & Indrajit Chowdhuri & Paramita Roy & Manisa Shit, 2022. "Chemical weathering and gully erosion causing land degradation in a complex river basin of Eastern India: an integrated field, analytical and artificial intelligence approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 110(2), pages 847-879, January.
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