Static accumulation effect of two artificial reef monomer models

The trend of artificial reefs construction in China has following two aspects: using large-scale artificial reef construction project to enhance the ecological effect of hard substrate, and using offshore artificial reef construction to extend the stock enhancement function of hard substrate. Static accumulation experiment was conducted to analyse the stacking effect and performance of regular frame reef monomer and HUT reef monomer, which are commonly used for offshore reef pile construction in China. In view of the structure and shape of reef monomer, the index of coefficients, such as the volume growth rate, the volume ratio and stack slope angle of the two monomers (regular frame reef monomer vs. HUT reef monomer) models in the experiment were compared. Also, we compared the change of efficiency in different quantity between two monomers. The results showed that: ①using the same quantity monomer condition model, the volume growth rate of the regular frame reef monomer is higher than that of the HUT reef monomer, and the scale and bottom area of the artificial mound are relatively higher. regular frame reef: 7.799±0.057. This result demonstrated that regular frame reef monomer is more appropriate for artificial reef construction in slow current and shallow waters. While the volume ratio of the HUT monomer forming-mound structure is higher than that of the regular frame reef forming-mound structure. This result showed that HUT reef monomer forming mound is relatively taller and more permeable, which is more appropriate for offshore artificial reef construction project. ② From the perspective of the height contribution rate of two types of monomer mound, and the difference of the characteristics of the two monomers is fully demonstrated in our study. Specifically, to achieve effective physical effect of artificial reef mound, the minimum number of regular frame reef units is 28 while that of the HUT reef unit is 40.