Author(s): Jean Marie Vianney Ntamwiza

Abstract: In rain period, the transport and commercial activities keep not being operational, this paper intention was to assess the problem and provide some solutions. To achieve the target, site investigations in area affected was conducted and samples of soil have been taken in laboratory tests and results have been analyzed, the results in Soil lab indicated that liquid limit, plastic limit, and plastic index are 27.6%, 11.1% and 16.5% respectively (sample is medium plasticity), sieve analysis test indicates that the sample is clayed soil as 85.764% have been passed through sieve size of 0.075mm, direct shear test in Gakenke District indicates that Cohesion and angle of internal friction are 25.08 and 34.67. It is observed that using vetiver walls mixed with banana fiber bags is suitable method to uproot the prevailed landslide in the affected area as it worked in other countries and the Vetiver walls are better to reduce or eliminate natural disasters such as landslides or mudslides and erosion.

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