摘要
人工鱼礁是放置于海底以影响海洋生物资源的物理、生物或社会经济过程的人工设施,具有修复生态环境、保护渔业资源的功能。21世纪以来我国东海区开展了较大规模人工鱼礁建设,用以改善渔业资源严重衰退的局面。科学地评价人工鱼礁建设的经济效果,对指导今后建设具有重要现实意义。本文根据东海区建设规模超过5×104空m3、建成时间大于2年、礁体结构为具有代表性的钢筋混凝土和旧船改造、并且有跟踪调查记录的4个有代表性的资源保护型人工鱼礁项目的调查资料,选取净现值(NPV)、动态投资回收期(DPP)、内部收益率(IRR)和益本比(BCR)等作为评价指标,运用模糊数学法建立了相应的模糊隶属函数,运用熵权法确定了评价指标权重,计算了经济效果评价值。结果表明,评价结果与实际调研结果吻合,评价方法可以作为东海区相近海况的同类型鱼礁经济效果评价的参考依据。
The artificial reef is referred to a kind of man-made facility that is placed in seabed in order to result in positive effects on physical,biological and socio-economic processes of marine biotic resources.It gainfully bears the characteristics of rehabilitation and restoration of the marine environment,and protecting and reserving fishery resources.A Large numbers of artificial reef projects have been developing in the East China Sea since the 21st century in order to restore and enhance fishery resources.It is especially important for future construction of artificial reefs to make reasonable evaluation on the economic impact of artificial reefs.In general,the evaluation index system associated with construction of artificial reefs comprises the added value of fishery production,the added value of the fishermen income,tax,and operation costs.However these indices are substantially difficult to establish quantitative evaluation criteria and evaluation methods.The financial indices have been applied to evaluate the economic impacts of non-commercial forests,non-commercial reservoir projects and highway in a series of current studies because of being able to provide explicit evaluation criteria and evaluation methods and to dynamically describe economic impacts.On the basis of socio-economic investigation data from 4 artificial reef projects in the East China Sea carried out for fishery resources conservation bear the characteristics as follows：1）the construction scale is larger than void 5×104 m3;2）the projects have been accomplished for over 2 years;3）the type of the materials are ferroconcrete and discarded boat;and 4）the projects have track investigation records.Based on the attributes of artificial reefs,four dynamic financial evaluation indices were selected to perform the study,including net present value（NPV）,dynamic payback period（DPP）,inner rate of return（IRR）and benefit-cost ratio（BCR）.Further,the fuzzy membership functions for the evaluation indices on artificial reefs were established.The weight for each evaluation index was assigned by using the entropy method in succession.Finally,synthetical evaluation values of economic impacts on artificial reefs were calculated.Results indicated the evaluation method proposed in this study was basically in good agreement with the socio-economic investigation to these artificial reefs,which would be applied to evaluate economic impacts of similar artificial reefs in the future.
出处
《资源科学》
CSSCI
CSCD
北大核心
2009年第12期2183-2191,共9页
Resources Science
基金
国家高技术研究发展计划(863计划)重点项目(编号:2006AA100303)
