Erosion Control of Slopes Using Paddy Straw Geomesh
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2021 by IJETT Journal|
|Year of Publication : 2021|
|Authors : Halkude S.A, Katdare R.C.
|DOI : 10.14445/22315381/IJETT-V69I1P210|
MLA Style: Halkude S.A, Katdare R.C. "Erosion Control of Slopes Using Paddy Straw Geomesh" International Journal of Engineering Trends and Technology 69.1(2021):66-73.
APA Style:Halkude S.A, Katdare R.C. Erosion Control of Slopes Using Paddy Straw Geomesh International Journal of Engineering Trends and Technology, 69(1), 66-73.
Erosion of newly constructed embankments due to rainfall is a regular phenomenon in which the raindrop impact leads to the disintegration of the embankment soil particles, slowly leading to slope failure. One of the erosion control measures includes market-established erosion control products made up of jute and coir. These products are useful but cost-prohibitive. Therefore, to provide a low-cost alternative for erosion control of newly constructed slopes, a handmade Paddy Straw Geomesh‘6PSG-12’ (6 referring to its thickness in mm and 12, referring to its 12 mm x12 mm aperture size) is indigenously developed. The field tests for estimating erosion control capabilities are cost-prohibitive and time-consuming; the various erosion control products are tested on a bench-scale level before field tests . Hence, the quantification of Erosion is done using the Bench scale (laboratory) test, and validation is done by field test  . The proposed 6PSG-12 genomes used in the present work for erosion control satisfy all required properties, viz. tensile strength, durability, etc.
‘Bench-scale testing’ of 6PSG-12 specimens is carried out under a ‘Simulated rainfall’ of known intensity using in-house developed ‘drip’ type ‘Rainfall Simulator’ (RS). The simulated rainfall is made to fall on a ‘bare slope’ and a ‘slope covered with PSG.’ The test results show that the 6PSG-12 specimens effectively control the Erosion of slope made up of ‘Well-graded gravel with sand’ to the extent of 91.29 %, under the simulated rainfall of intensity 130 mm/hour for 30 minutes. The erosion control products made with other natural materials like Jute, Coir, and Paddy straw are difficult to compare with each other; since these perform under different environmental conditions. Still, the erosion control efficiency of Paddy Straw 6PSG-12 Geomesh is found to be 91.29%, which is comparable with ‘Jute mesh’ and ‘Coir net,’ reported as 92% and 90%, respectively . The ‘Effective cover factor’ of Paddy Straw Geomesh (i.e., the ratio of ‘soil loss on the protected slope’ to the ‘soil loss on the unprotected slope’) works out 0.089, which is also encouraging.
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Paddy Straw Geomesh (PSG), Newly constructed embankment, Rainfall simulator, Laboratory scale plot, Simulated rainfall, Drop size distribution, Erosion