Porous medium resistance model and simulation on effect of wave dissipation of mangrove forest

被引：0

作者：

Wu, Yanyou ^{[1
,2
]}

Guo, Xiaojun ^{[1
]}

Fu, Weiguo ^{[1
]}

Chen, Yujun ^{[3
]}

机构：

[1] Key Laboratory of Modern Agricultural Equipment and Technology, Institute of Agricultural Engineering, Jiangsu University

[2] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

[3] Research Institute of Tropical Forestry, Chinese Academy of Forestry

来源：

Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2012年 / 28卷 / 23期

关键词：

Computer simulation; Effect of wave dissipation; Mangroves; Model; Porous materials;

D O I：

10.3969/j.issn.1002-6819.2012.23.013

中图分类号：

学科分类号：

摘要：

Wind and wave dissipation of tidal flat vegetation plays an important role in the embankment protection. The flow resistance mathematical models for mangrove porous media were built based on the momentum conservation equation and exponent equation using porous media source of speed. The effects of different factors on the flow resistance of mangrove were analyzed by using computational fluid dynamics software, Fluent. The results showed that the dissipation effect was involved in the porosity, the width of shelterbelt, and the depth of wave. Of which, the effect of water depth on wave dissipation was most obvious. With the increase in the porosity, the wave velocity increased sharply at first, and then increased slightly as the porosity was more than 0.4. With increase in the forest belt width, the wave velocity decreased at different degree. The fitting results of Logistic equation based on 4 parameters showed that wave velocity presented a decrease tendency of anti-S-Shape with increase of the forest belt width. Based on above results, a new approach was put forward for evaluation of the effect of mangroves on wave dissipation.

引用

页码：91 / 97

页数：6

共 30 条

[1]

Carollo F.G., Ferro V., Termini D., Flow resistance law in channels with flexible submerged vegetation, Journal of Hydraulic Engineering, 131, 7, pp. 554-564, (2005)

[2]

Li H., Analysis on the deformation of the seabuckthorn flexible dam, Journal of Arid Land Resources and Environment, 21, 3, pp. 144-148, (2007)

[3]

Schutten J., Davy A.J., Predicting the hydraulic forces on submerged macrophytes from current velocity, biomass and morphology, Oecologia, 123, 4, pp. 445-452, (2000)

[4]

Pang M., Eco-Hydrology Effects of Vegetation Construction in Loess Plateau, (2010)

[5]

Ni H., Gu F., Roughness coefficient of non-submerged reed, Journal of Hydrodynamics (Ser.A), 20, 2, pp. 167-173, (2005)

[6]

Dunn C.J., Lopez F., Garcia M.H., Et al., Mean flow and Turbulence in a Laboratory Channel with Simulated Vegetation, (1996)

[7]

Jordanova A.A., James C.S., Experimental study of bed load transport through emergent vegetation, Journal of Hydraulic Engineering, 129, 6, pp. 474-478, (2003)

[8]

Gu F., Ni H., The effects of the reeds density on flow resistance, Journal of Hydrodynamics (Ser.A), 21, 5, pp. 626-631, (2006)

[9]

Velasco D., Bateman A., Redondo J.M., Et al., An open channel flow experimental and theoretical study of resistance and turbulent characterization over flexible vegetated linings, Flow, Turbulence and Combustion, 70, 1, pp. 69-88, (2003)

[10]

(1989)

← 1 2 3 →