The Evaluation Of Proliferation Effect Of Typical Artificial Reefs In Shandong Province

Artificial reef is a kind of special structure put in the midst of the sea where was scientifically chosen, to improve the marine ecological environment and provide habitat for fish and other aquatic organisms where they could forage, breed, grow and avoid enemy, so as to repair the ecological habitat, improving ecological environment of coastal waters, curing the purpose of the fishery resources. At present, there are more than 50 countries and regions in the world having constructions of the artificial reefs.Since the plan of repairing fishery resources has been carried out in 2005, Shandong Province has the biggest artificial reef construction scale, the most specification management and the most prominent effect all over the country. With such big scale of artificial reefs, there has not been a scientific evaluation system of proliferation effect of artificial reefs. In this research, we evaluate the ecological effect, economic effect and social effect of three typical artificial reefs in Shandong Province based on the resources and environmental survey. 1.The ecological effectWe constructed an evaluation model based on entropy-weighted fuzzy matter-element method, including the indicators of the species to proliferate. We also compare the artificial reef area, control area and three levels of different standard to evaluate the ecological effect of the three artificial reef areas in Shandong Province. The results indicate that, the comprehensive evaluation value of the artificial reef area in Qiansandao sea area is 0.6679, which is better than the control area(0.6178) and Level I (0.5123); the comprehensive evaluation value of the north artificial reef area in Xigang sea area is 0.6423 and the south is 0.6171, which are better than the control area(0.5363) and Level I (0.5746); the comprehensive evaluation value of the artificial reef area in Rongcheng sea area is 0.6840, which is better than the control area(0.6179) and Level I (0.5635). The artificial reef has obvious ecological effect.2. The economic effectWith four indicators which can reflect the status of economic benefits of artificial reef project, we use entropy method to determine the weight value to evaluate the economic effect. The result indicates that, the artificial reef projects have significant benefits. The comprehensive evaluation value of Qiansandao sea area is 0.259, with Xigang 0.507 and Rongcheng 0.234. Xigang sea area is slightly better than the other two projects.3.The social effectWe use the analytic hierarchy process (AHP) to determine the index weight of 13 indicators based on 4 levels of social benefit evaluation system. The result indicates that, the comprehensive value of Qiansandao, Xigang and Rongcheng is 0.8496, 0.8000 and 0.7966. It shows that the social effect of Qiansandao sea area is slightly better than the other two projects.Above all, the construction of artificial reefs has significant effect.