Comparison of the effect of riprap, herbaceous textile and grass cover on reduction of sediment yield from the ditch of forest roads

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Khandouzi R.; PARSAKHOO A.; SHEIKH V.B.; Mohammad Ali Pourmalekshah A.A.

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Paper Information

Journal: Journal of Water and Soil Conservation Year:2019 | Volume:25 | Issue:6 Page(s): 255-267

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Title

Comparison of the effect of riprap, herbaceous textile and grass cover on reduction of sediment yield from the ditch of forest roads

Author(s)

Khandouzi R. | PARSAKHOO A. | SHEIKH V.B. | Mohammad Ali Pourmalekshah A.A. | Issue Writer Certificate

Keywords

DitchQ1

Flow velocityQ1

Protective treatmentsQ1

Runoff simulationQ1

Sediment concentrationQ2

Abstract

Background and Objectives: Lateral Ditches which are constructed to drain surface flow and protect the road structure under the severe rainfall are eroded by runoff velocity and then sediment as suspended load are transmitted to the river and aquatic ecosystem. Therefore, use of the cost effective, efficient and environmental techniques is essential for protecting Ditches. The objective of this research was to compare the effect of different Protective treatments on reduction of sediment yield from the Ditch of forest roads as well as the assessing the effect of flow intensity on Sediment concentration. Materials and Methods: At first a reach of lateral Ditch with a total length of 50 meters was selected along the main roads of district one in the Bahramnia forestry plan in Golestan Province. The longitudinal slope (5% with dimension of 30 × 50 cm) and soil type (texture, porosity and moisture) of selected reaches were same. Five sub-reaches (treatments) each of with a length of 10 meters were considered for establishing the Protective treatments including riprap, grass cover by Festuca, cotton geotextile, picket and wattle by local slash and control. Flow simulation was done for ten minutes at two flow rates of 5 and 10 L S-1 using a tank with capacity of 6000 liters equipped with motor-pump. Sediment sampling from the runoff was carried out at the end of each sub-reach every minute. Samples were transported to the laboratory and there Sediment concentration was calculated in gram per liter. Runoff Flow velocity in different treatments was measured using an electromagnetic flow meter. Results: Sediment concentration and runoff velocity in treatments of riprap, grass cover by Festuca, cotton geotextile, picket and wattle by local slash was significantly lower than that of control. Increasing flow rate from 5 L S-1 to 10 L S-1 caused no significant change in Sediment concentration (except for control and riprap treatments) and runoff velocity (except for control and cotton textile treatments). Sediment yield from riprap and control treatments under the flow rate of 10 L S-1 was significantly higher than that of 5 L S-1. Moreover, runoff velocity from cotton textile and control treatments under the flow rate of 10 L S-1 was significantly higher than that of 5 L S-1. Conclusion: Treatments of picket and wattle, riprap, grass cover by Festuca and cotton geotextile in Ditch with low flow rates (5 L S-1) and treatments of cotton geotextile, picket and wattle with local slash in high flow rate (10 L S-1) can be used for a forest road with dimension 30 × 50 cm, slope 5%, clay soil with porosity 57% because of their high efficiency in reducing sediment yield and runoff velocity.

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APA: Copy

Khandouzi, R., PARSAKHOO, A., SHEIKH, V.B., & Mohammad Ali Pourmalekshah, A.A.. (2019). Comparison of the effect of riprap, herbaceous textile and grass cover on reduction of sediment yield from the ditch of forest roads. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(6 ), 255-267. SID. https://sid.ir/paper/156432/en

Vancouver: Copy

Khandouzi R., PARSAKHOO A., SHEIKH V.B., Mohammad Ali Pourmalekshah A.A.. Comparison of the effect of riprap, herbaceous textile and grass cover on reduction of sediment yield from the ditch of forest roads. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;25(6 ):255-267. Available from: https://sid.ir/paper/156432/en

IEEE: Copy

R. Khandouzi, A. PARSAKHOO, V.B. SHEIKH, and A.A. Mohammad Ali Pourmalekshah, “Comparison of the effect of riprap, herbaceous textile and grass cover on reduction of sediment yield from the ditch of forest roads,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 6 , pp. 255–267, 2019, [Online]. Available: https://sid.ir/paper/156432/en

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