PREDICTION OF VEGETATION COVER EFFECT ON BANK AND BED HYDRAULIC ROUGHNESS COEFFICIENT IN SHIRAZ KHOSHK RIVER

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NIKMANESH M.R.

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Journal: JOURNAL OF WATER SCIENCES AND ENGINEERING Year:2012 | Volume:1 | Issue:3 Page(s): 41-54

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Title

PREDICTION OF VEGETATION COVER EFFECT ON BANK AND BED HYDRAULIC ROUGHNESS COEFFICIENT IN SHIRAZ KHOSHK RIVER

Author(s)

NIKMANESH M.R. | Issue Writer Certificate

Keywords

VEGETATION COVERQ2

HYDRAULIC ROUGHNESS COEFFICIENTQ2

KHOSHK RIVERQ2

Abstract

Soil and water resources management of rivers has an important role because of direct relation with different systems such as earth, life, social and people. Although the use of VEGETATION COVER in bioengineering and biological stabilization and also soil and water resources management projects has many advantages, but improper methods of design and implementation cause hydraulic specifications of river alter. The VEGETATION COVER in river reach decreases flow mean velocity, river's width and increases sedimentation in river bed and therefore discharge capacity be reduced. In this paper, we will investigated different projects of retrieval VEGETATION COVER and bioengineering in Shiraz KHOSHK RIVER as an influential element in Shiraz city and their effects on hydraulic specifications of river. Also, advantages and disadvantages of bioengineering and biological stabilization projects of the river are discussed. Also problematic river reach caused by improper biological stabilization was identified and the inappropriate implementation effects of VEGETATION COVER on increase of HYDRAULIC ROUGHNESS COEFFICIENT and reduction of discharge capacity were investigated. Based on results, although erosion rate of KHOSHK RIVER’s banks in sections without VEGETATION COVER was more than sections with VEGETATION COVER, sometimes VEGETATION COVER caused a significant increase of HYDRAULIC ROUGHNESS COEFFICIENT and significant reduction of section area and discharge capacity. The KHOSHK RIVER’s sections such as upstream and downstream of Chamran Boulevard Bridge, upstream of Ghadir Bridge and downstream of Fazilat Bridge were analyzed by HEC-RAS. In these sections for stream flow values of 100 to 250 m3/sec, reduction of 10 to 28.5% was obtained.

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APA: Copy

NIKMANESH, M.R.. (2012). PREDICTION OF VEGETATION COVER EFFECT ON BANK AND BED HYDRAULIC ROUGHNESS COEFFICIENT IN SHIRAZ KHOSHK RIVER. JOURNAL OF WATER SCIENCES AND ENGINEERING, 1(3), 41-54. SID. https://sid.ir/paper/235535/en

Vancouver: Copy

NIKMANESH M.R.. PREDICTION OF VEGETATION COVER EFFECT ON BANK AND BED HYDRAULIC ROUGHNESS COEFFICIENT IN SHIRAZ KHOSHK RIVER. JOURNAL OF WATER SCIENCES AND ENGINEERING[Internet]. 2012;1(3):41-54. Available from: https://sid.ir/paper/235535/en

IEEE: Copy

M.R. NIKMANESH, “PREDICTION OF VEGETATION COVER EFFECT ON BANK AND BED HYDRAULIC ROUGHNESS COEFFICIENT IN SHIRAZ KHOSHK RIVER,” JOURNAL OF WATER SCIENCES AND ENGINEERING, vol. 1, no. 3, pp. 41–54, 2012, [Online]. Available: https://sid.ir/paper/235535/en

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