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Land degradation risk assessment in Al-Sawda terraces, Kingdom of Saudi Arabia

  • Samy Mohamed Abdallah
  • E. E. Massoud
Original Paper
  • 92 Downloads

Abstract

Monitoring of soil properties is a significant process and plays an important role about how it can be used sustainably. This study was performed in a local area in Sawda Mountains KSA to map out some soil properties and assess their variability within the area under different land cover. Soil sampling was carried out in four different sites using the grid sampling technique. Ten samples were collected in each location within a 10 by 10 km area; soil was sampled at 0–30-cm depth. The soil samples were air-dried, crushed, and passed through a 2-mm sieve before analyzing it for pH, EC, CaCO3, organic matter contents, and bulk density. The thematic maps of these characteristics were produced using ArcGIS 10.0 software. Finally, the land degradation was assessed using three factors: soil salinization, compaction, and edibility. The obtained results showed that the high risk of soil compaction, salinization, and erodibility occupied an area 5.6 ha (17.5%), 3.7 ha (11.54%), and 8.1 ha (25.3%), respectively, in the surface soil layer. The land degradation risk in the study area due to salinization was low to high; however, the degree of soil compaction was moderate to very high. The K-factor (soil erodibility) in the area ranged between 0.1 and 0.35 Mg h MJ−1 mm−1, and most of the study area was located in moderate to high erodibility classes.

Keywords

Land degradation Al-Sawda terraces Soil salinization Soil compaction GIS 

Notes

Acknowledgements

Special thanks are given to Dr. Mohammed Saifeldeen Abd-Elwahed Assistant Professor, Soil Sci. Dept., Faculty of Agriculture, Ain Shams University, Cairo, Egypt, for his great effort in this research especially in the part of GIS.

Funding information

The study was funded by Deanship of Scientific Research at King Khalid University for through General Research Project under grant number (G.R.P-327-38).

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Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.Faculty of Science, Biology Department, Prince Sultan Bin Abdul-Aziz Center for environment and tourism research and studiesKing Khalid University AbhaAbhaSaudi Arabia
  2. 2.Department of Soils and water, Faculty of AgricultureAin Shams UniversityCairoEgypt
  3. 3.Faculty of Sciences and Arts in Dahran AljanoubKing Khalid University AbhaDahran AljanoubSaudi Arabia
  4. 4.Agriculture Research Center, Research Institute for Land, Water and EnvironmentGizaEgypt

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