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首页> 外文期刊>Oceanologia >Erosion and deposition processes from field experiments of hydrodynamics in the coastal mangrove area of Can Gio, Vietnam
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Erosion and deposition processes from field experiments of hydrodynamics in the coastal mangrove area of Can Gio, Vietnam

机译：越南Can Gio沿海红树林地区水动力实验的侵蚀和沉积过程

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Summary Studying hydrodynamic processes is necessary for understanding the sediment erosion–deposition mechanism in mangrove areas. The hydrodynamic effects within the mangrove area of the Dong Tranh Estuary in the Can Gio Mangrove Biosphere Reserve in Ho Chi Minh City (HCMC), Vietnam are very complicated and are caused by the mixed impacts of waves, tides, currents and suspended sediment concentrations (SSCs). In this study, the measurements of hydrodynamics such as waves, currents and SSCs were conducted in the dry (Feb. 2012) and wet (Jun. 2014) seasons. Three stations were set up within the estuary, mud-flat and mangrove forest. The analysed results showed that the hydrodynamics in all three stations were strongly influenced during the first dry monsoon season and the next wet one. The waves were the main factor during the dry season and contributed more SSC turbulence in the mud-flat, potentially causing erosion at the study site. Meanwhile, the current velocities in both the estuary and mud-flat sites were major factors during the wet season. In the mangrove forest, the SSC during the dry season changed due to the tidal cycle. Additionally, two measurements for the change in the topographies and shorelines were conducted from 2014 to 2017. The results show that the study site has been eroding rapidly (0.61?m?monthsup?1/sup). Although this study shows a soil retention role for the mangrove forests, the wave energy dissipation occurs mainly within the mud-flat due to the bottom topography. The study site is proven to be eroding.
机译：小结研究水动力过程对于理解红树林地区的泥沙冲淤机理是必要的。越南胡志明市Can Gio红树林生物圈保护区Dong Tranh河口红树林区域内的水动力效应非常复杂，是由波浪，潮汐，洋流和悬浮沉积物浓度的混合影响引起的（ SSC）。在这项研究中，在干旱（2012年2月）和潮湿（2014年6月）季节对波浪，洋流和SSCs等流体力学进行了测量。在河口，滩涂和红树林内设置了三个站。分析结果表明，在第一个干燥的季风季节和下一个潮湿的季节，这三个站的水动力都受到很大的影响。波浪是干旱季节的主要因素，在泥滩中造成了更大的南南合作湍流，可能在研究地点造成侵蚀。同时，河口和滩涂地点的当前流速是雨季的主要因素。在红树林中，干旱季节的南南合作因潮汐周期而改变。此外，从2014年到2017年对地形和海岸线的变化进行了两次测量。结果表明，研究地点正在迅速侵蚀（0.61？m？month ？1 ）。尽管这项研究显示了红树林的土壤保持作用，但由于底部的地形，波能的消散主要发生在滩涂内。研究现场被证明正在侵蚀。

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