+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Studies on the turfing work for the protection of cutting slope 3. on the mechanism of surface erosion and the protection effects by vegetation



Studies on the turfing work for the protection of cutting slope 3. on the mechanism of surface erosion and the protection effects by vegetation



Bulletin of the Ehime University Forest (18): 125-142



The actual conditions of the surface erosion and the turfing work on the cutting slope were investigated in more detail. Observations were made of rainfall runoff, vegetation growth, sediment yield and surface runoff depth on the experimental cutting slope during the period from the end of June to the beginning of Dec., 1980. The cutting slope on the forest road opened in the Komenono University Forest of Ehime University [Japan] was studied. The soil is granite decomposed into coarse grains forming a sandy loam. The experimental site on cutting slope was divided into 2 kinds with divisions by the difference of soil hardness index. Each plot had a length of 2.20 m, a width of 2.00 m and an inclination angle of 30.degree. The materials used were Yomogi and Kentucky 31 fescue (K-31-F). The soil hardnesses of experimental site were divided into 2 degrees, .apprx. 15 mm of hardness index and .apprx. 25 mm of hardness index with the Yamanaka soil hardness tester. The number of grasses per square meter of each vegetation plot was expected to be 5000. Seeds were sown in grooves of 3 cm depth and 20 cm width at an interval of 50 cm on the cutting slope. Growth was considerably influenced by soil hardness. The sediment yield of the control plots increased proportionally to the approximate square of the maximum 1-min rainfall intensity. Difference in soil hardness had direct effects upon sediment yield. The K-31-F plots showed the highest rate of control of the sediment yield by the vegetation among all vegetation plots. The correlation between the rate of control of the sediment yield by the vegetation and the growth index of vegetation was significant. The following empirical equation of the sediment yield holds an accurately presumptive formula of the sediment yield of erosion on a bare slope, the protective effects of the vegetation on the turfing work for the protection of the general slope: .**GRAPHIC**. where: E = sediment yield (g/cm2), .sigma. = density of sediment (g/cm3), d = grain-size of sediment (cm), i = maximum 10-min rainfall intensity (cm/s), g = acceleration of gravity (cm/s2), A, B and C = constant; the experimental values were A - 107.00 .apprx. 102.49, B = 1.01 .apprx. 0.61 and C = 3.0 .times. 10-1 .apprx. 4.0 .times. 10-4, respectively.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 006522699

Download citation: RISBibTeXText


Related references

Studies on the turfing work for the protection of banking slope 12. sediment yield and the protection effects of the vegetation on the experimental banking slope. Bulletin of the Ehime University Forest (17): 77-92, 1980

Turfing work for the protection of banking slope 15. the control effects of the sediment yield of interval of vegetation ditch. Bulletin of the Ehime University Forest (18): 115-124, 1981

Turfing work for the protection of banking slope 3. growth of vegetation sediment yield and rainfall runoff on the experimental banking slope. Bulletin of the Ehime University Forest (15): 109-126, 1978

Turfing for the protection of the banking slope 7. the utilization of empirical equation of the sediment yield to the vegetation work plots on the experimental banking slope. Bulletin of the Ehime University Forest (16): 139-148, 1979

Studies on the turfing work for the protection of banking slope 11. splash yield by the raindrops and the sediment yield on the experimental banking slope. Bulletin of the Ehime University Forest (17): 69-76, 1980

Studies on the use of japanese weeds for the protection work of bare slopes 6. the runoff characteristics of rainfall on the cutting slope of the forest road. Bulletin of the Ehime University Forest (16): 149-156, 1979

Plant and engineering structure--a useful combination in slope protection Vegetation, erosion control, afforestation.1. Journal forestier suisse = Schweizerische Zeitschrift fur Forstwesen 134(3): 167-177, 1983

Role of vegetation in protection against surface water erosion. Comptes Rendus - Academie des Sciences Geoscience, 2004

Evidence of erosion protection by biological slope stabilization in surface-mining excavation areas of the Geisel Valley near Halle on the Saale. Hercynia 22(4): 401-411, 1985

Studies on vegetation succession on the slope of the forest road and development of slope revegetation methods: In cutting slope. Journal of Korean Forestry Society 82(4): 381-395, 1993

Residual effects of honeycomb structured unwoven fabric on slope protection after vegetation recovery. Research Bulletin of the Tottori University Forests ( 26): 29-40, 2000

Dynamic loading of bank protection works and its effects on slope protection and soil. Wissenschaftliche Zeitschrift der Technischen Universitat Dresden 37(4): 293-297, 1988

Effects of different terrace protection measures in a sloping land consolidation project targeting soil erosion at the slope scale. Ecological Engineering 53, 2013

Studying early stage slope protection effects of vegetation communities for Xinnan Highway in China. Ecological Engineering 110: 87-98, 2018

Effects of different vegetation protection measures on erosion prevention of unpaved roadside slopes in Three Gorges Reservoir Area. Ying Yong Sheng Tai Xue Bao 23(4): 896-902, 2012