Subscribe Now Subscribe Today
Science Alert
Curve Top
Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 24 | Page No.: 4044-4047
DOI: 10.3923/jas.2007.4044.4047
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Protection Roles of Tea-Citrus Garden on Slopes (N Iran)

Ghassem Habibi Bibalani, Lila Joodi, Naeimeh Shibaei and Zia Bazhrang

This study investigates the effects of vegetation on the stability of slopes using the finite element method. Parametric studies were performed to assess the sensitivity of the stability of a slope to the variation in the key vegetation and soil parameters. Results show that vegetation plays an important role in stabilizing shallow-seated failure of slopes and significantly affects stability. As Iran has a long history of landslides, this research deals with the effect of scrubs on slope stability, in particular, the economic interest such as tea and Citrus. It is well understood that vegetation influences slope stability mechanical effects. The shear strength of the soil is increased through the mechanical effects of the plant root matrix system. The density of the roots within the soil mass and the root tensile strength contribute to the ability of the soils to resist shear stress. The effects of soil suction and root reinforcement has been quantified as an increase in apparent soil cohesion. The study was carried out in Roudsar Township in Gilan State of Iran. In this area of 20 ha were considered suitable for the purposes of this study. A large part of the area had slopes of steep gradients on which tea-citrus garden was present. Soil samples were taken from an area of approximately 25 ha large for testing in the laboratory. Direct shear tests were carried out on soil samples and the Factor Of Safety (FOS) calculated. Results showed that the FOS was increased in soils with tea and citrus roots present. The global slope FOS was then determined using Bishop’s method. In this case study minimum FOS assumed 1.3, which corresponds to tea-citrus vegetation with 40-60% crown cover, a soil internal friction angle of 16° and a slope angle of 21 degree.
PDF Fulltext XML References Citation Report Citation
  •    Landslide Susceptibility Hazard Mapping Techniques Review
How to cite this article:

Ghassem Habibi Bibalani, Lila Joodi, Naeimeh Shibaei and Zia Bazhrang, 2007. Protection Roles of Tea-Citrus Garden on Slopes (N Iran). Journal of Applied Sciences, 7: 4044-4047.

DOI: 10.3923/jas.2007.4044.4047






Curve Bottom