海桑-无瓣海桑红树林生态系统的防浪效应

doi:10.11707/j.1001-7488.20120807

Scientia Silvae Sinicae ›› 2012, Vol. 48 ›› Issue (8): 39-45.doi: 10.11707/j.1001-7488.20120807

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Wave-Prevention Effects of Sonneratia caseolaris-S.apetala Mangrove Ecosystem

Wang Xu^1,2,3, Yang Huai⁴, Guo Shengqun¹, Zhou Guangyi⁴, Liao Baowen⁴

1. College of Environment and Plant Protection, Hainan University Danzhou 571737;2. Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources(Hainan University), Ministry of Education Danzhou 571737;3. Ministry of Agriculture Danzhou Key Field Station of Observation and Research for Tropical Agricultural Resources and Environments Danzhou 571737;4. Research Institute of Tropical Forestry, CAF Guangzhou 510520

Received:2011-01-24 Revised:2011-09-22 Online:2012-08-25 Published:2012-08-25

Abstract

Abstract:

In this paper, effect of Sonneratia caseolaris-S. apetala mangrove ecosystems on wave absorption was studied by monitoring the wave height, flow rate and weather conditions for one year (November, 2007-November, 2008). We analyzed the impact of weather conditions to wave-prevention effect of the mangrove forest, and quantitatively analyzed the wave-prevention effect of mangrove forest through the wave height and flow rate variation. Results showed that: 1) the average wave absorption coefficient of 30 m wide mangrove forest was 0.12, and the largest wave absorption coefficient achieved 0.47. During the storm the average wave absorption coefficient was 0.18, the largest wave absorption coefficient was 0.33, and the wave absorption effect increased by 38%. 2) According to the calculated formula of wave absorption, the wave absorption coefficient of 30 m wide mangrove is 0.58, is much greater than the measured wave absorption coefficient. 3) Under normal condition, the wave absorption effect of Sonneratia-Sonneratia apetala mangrove forests increased as wave height increased. However, when all the trees were inundated, the forest almost lost its wave absorption effect, even wave forest rear was higher than that of the forest front, indicating that forest height had important significance to wave-prevention and revetment benefits of the mangrove forest. 4) On coastal environment of tidal level wavy, different tree species and age forests formed multi-level structure, which improved comprehensive wave absorption and wave-prevention function of mangrove forests.

Key words: mangroves ecosystem, wave height, wave absorption coefficient

CLC Number:

S727.2

Wang Xu;;Yang Huai;Guo Shengqun;Zhou Guangyi;Liao Baowen. Wave-Prevention Effects of Sonneratia caseolaris-S.apetala Mangrove Ecosystem[J]. Scientia Silvae Sinicae, 2012, 48(8): 39-45.

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Wave-Prevention Effects of Sonneratia caseolaris-S.apetala Mangrove Ecosystem

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