【摘 要】
：
Artificial reef is a man-made object that is deployed purposefully on the seafloor to restore the offshore fishery resources and the ecological environment. To secure its ecological effects, it is important to study the possible instability of artificial
【机 构】
：
Fisheries College,Ocean University of China,Qingdao 266003,China
【出 处】
：
中国海洋大学学报（自然科学英文版）
论文部分内容阅读
Artificial reef is a man-made object that is deployed purposefully on the seafloor to restore the offshore fishery resources and the ecological environment. To secure its ecological effects, it is important to study the possible instability of artificial reefs, like drifting and reversing caused by burial and scour in different seafloor conditions. In the present study, experiments of local scour around an artificial reef are carried out in steady currents. The effect of the open-area ratios and the open-hole heights of the cubic reefs, and the bottom angles of the triangular reefs on the time-scale of the scour process and the equilibrium scour depth are investigated. The results indicate that for the cubic artificial reef, the scour depth decreases with the increasing open-area ratios, and increases with the increasing open-hole heights. In the present study, the optimal prototype of the cubic reef with an open-area ratio of 0.49 and open-height of 0.7 m produces the minimum scour depth. For the triangular reef, the scour depth increases when the bottom angle increases. Moreover, based on the experimental results, empirical equations of the effects of the cut-opening and the bottom angle on the maximum equilibrium scour depth are proposed. The formulas will provide theoretical support and practical guidance for the opti- mized design and construction of artificial reefs.
其他文献
Metal pollution has become an major issue governing the wetland ecosystem health. The southern coastal wetland of the Qiangtang Estuary are facing unusual perturbation due to rapid development along the embayment in recent decades. This study evaluated th
The structure of an air-floating caisson is suitable for the major structure of caisson-type artificial islands. Thus, it has been rapidly developed and widely used in the exploration and development of oil and gas fields in shallow sea and intertidal zon
Because the sound speeds of seawater and seafloor sediment both increase with temperature, the influence of tempera-ture on the bottom reflection characteristics of seafloor sediments needs to be investigated. Based on the calculation of the temperature-
Based on seawater immersion, drying-wetting cycles, carbonation and drying-wetting cycles for coral aggregate sea-water concrete (CASC) with different strength grades, the effect of carbonation and drying-wetting cycles on chloride diffusion be-havior of
Dammam City is one of the gorgeous coastal areas in the Arabian Gulf of Saudi Arabia. The present study aimed to ex- amine one of the copepod species infecting the rosy goatfish that represents a highly consumed fish species by the local population in the
The objective of this paper is to propose an empirical method to inverse significant wave height (SWH) under typhoon conditions from collected dual-polarization Gaofen (GF)-3 synthetic aperture radar (SAR) imagery. The typhoon scenes were cap-tured from n
As fish stocks have been overexploited and catches have decreased over the last few years, the cephalopod catch has increased globally to the point that they are now among the most important marine resources in the world. Climate change and hu-man activit
Silver nanoparticles (AgNPs) have been widely used in medicine and consumer products. And it enters the river in dif-ferent ways, then finally converges to the ocean through the estuary. AgNPs polution can affect NO2? and N2O production by denitri-fiers i
The electric inversion technique reconstructs the subsurface medium distribution from acquired data. On the basis of electric inversion, objects buried under the earth or seabed, such as pipelines and unexploded ordnance, are detected and located in a con
Crustacean is one of the major allergic foods. It is of great significance to identify more crab allergens and research the detection methods for crab food anaphylaxis. In this study, IgE reactivity to three recombinant proteins from Portunus tritubercula