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Predicting Soil Erosion Rate at Transboundary Sub-Watersheds in Ali Al-Gharbi, Southern Iraq, Using RUSLE-Based GIS Model

Author

Listed:
  • Ammar Ak. Ali

    (Department of Geology, College of Science, University of Basrah, Basrah 61007, Iraq
    General Commission of Groundwater, Ministry of Water Resources, Baghdad 00964, Iraq)

  • Alaa M. Al-Abbadi

    (Department of Geology, College of Science, University of Basrah, Basrah 61007, Iraq)

  • Fadhil K. Jabbar

    (General Commission of Groundwater, Ministry of Water Resources, Baghdad 00964, Iraq
    College of Engineering, University of Misan, Misan 62010, Iraq)

  • Hassan Alzahrani

    (Department of Geology and Geophysics, College of Science, King Saud University, Riyadh 11451, Saudi Arabia)

  • Samie Hamad

    (Geological Engineering Department, Missouri University of Science and Technology, McNutt Hall, 1400 N. Bishop Ave, Rolla, MO 65401, USA)

Abstract

The empirical soil loss model, RUSLE, was used in conjunction with remotely sensed data and geographic information system technology to delineate the soil erosion and watershed priorities in terms of conservation practices at seven boundary sub-watersheds (labeled as SW-00, SW-01, …, SW-06) between Iraq and Iran in the district of Ali Al-Gharbi, southern Iraq. The six factors of the RUSLE model, i.e., the rainfall erosivity, the soil erodibility, the slope steepness length, the crop management, and management practice, were calculated or estimated using information from different data sources such as remotely sensed data and previous studies. The results revealed that the annual soil erosion loss ranges from 0 to 1890 (tons h −1 y −1 ) with an average of 0.66 (tons h −1 y −1 ). Values of soil erosion were classified into five classes: very low, low, moderate, high, and very high. The potential soil loss in the high and very high classes ranges from 14.84 to 1890 (tons h −1 y −1 ), and these classes occupy only 27 km 2 of the study area, indicating that the soil loss is very low in the area being examined. In terms of the spatial distribution of soil loss, the northern and northeastern parts (mountains and hills) of the sub-watersheds where the slope is steeper are more likely to erode than the plain area in the southern and southeastern portions, indicating that slope, in addition to rainfall erosivity, has a dominant effect on the soil erosion rate. The study of soil erosion in the watersheds under consideration reveals that only the northern portions of the SW-00, SW-02, and SW-04 watersheds require high priority conservation plans; however, these portions are primarily located in mountain regions, making the implementation of conservation plans in these areas impractical. Due to low soil loss, other sub-watersheds, particularly SW-01, SW-03, SW-05, and SW-06, are given low priority.

Suggested Citation

  • Ammar Ak. Ali & Alaa M. Al-Abbadi & Fadhil K. Jabbar & Hassan Alzahrani & Samie Hamad, 2023. "Predicting Soil Erosion Rate at Transboundary Sub-Watersheds in Ali Al-Gharbi, Southern Iraq, Using RUSLE-Based GIS Model," Sustainability, MDPI, vol. 15(3), pages 1-14, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:3:p:1776-:d:1038766
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    References listed on IDEAS

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