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Mohd Asri, Nazifa (2007) THE EFFECT OF TYPES OF VEGETATION ON SLOPE ALONG THE NORTH-SOUTH EXPRESSWAY. Universiti teknologi petronas. (Unpublished)

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North-South Expressway is an infrastructure network constructed to link North area and South area in Peninsular Malaysia. The expressway involves of many cut-off slopes during its construction. The disturbance slope will change its stability that lead to slope failure such as erosion and landslide. The main objective of this study is to investigate, determine and analyze the effect of types of vegetation on slopes along the North-South Expressway. Eight selected slopes are chosen as study site. The study involves some methodologies. Research, data collection of slope data, rainfall data and vegetation data, data analysis using USLE method, distribution particle size test to determine soil types become very helpful methods in verifying results to meet the goals of project. The result from the USLE calculation shows tree or woody vegetation provides greater mechanical reinforcement and buttressing action because it has stronger and deeper rooted, so it is best for slope protecting, compared to fern and bushes that protect only surficial slope. Slopes with tree give the lowest value of soil loss in the range of 95.54 to 162.23 tons for all years, followed by slopes with bushes by 17134.92 to 60153.61 tons. Slopes with fern give the highest amount of soil loss with 24552.69 to 95059.04 tons. Hence, bushes give better protection towards soil erosion compared to fern. Thus, tree is the type of vegetation that works best in protecting soil erosion, followed by bushes and fern. Error in this estimation can occur because the USLE is an empirical equation that does not mathematically represent the physical processes of soil erosion. However, the relative results from different years may still be useful to predict the trend of soil erosion.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Geotechnic and highway
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 24 Oct 2013 09:14
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/9556

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