文档介绍：摘要生活污水、工业废水集中处理达标后离岸深水排放是充分利用海域环境自净能力、缓减近岸海域环境压力的重要手段,也逐步成为沿海地区污水排放的主要方式。依据海洋自然属性,合理利用近海海域的环境容量,适当考虑排海工程的建设成本,顾及周边海域的生态环境,科学合理的选择离岸排污口是实现污水离岸排放的前提和基础。离岸排污13选划已成为一个迫切需要解决的研究课题。论文以江苏射阳海域为例,研究开敞海域离岸排污口的选划技术与方法。论文在分析开敞海域地形水文特征、生态环境现状的基础上,提出了离岸排污13预选的原则;利用二维潮流模型与水质扩散模型对排污13预选方案进行初步筛选; 然后运用多目标决策理论模型与方法,建立了开敞海域离岸排污VI选划指标体系,构建开敞海域离岸排污13选划决策模型。论文提出了9个离岸排污口的预选方案,在利用二维潮流模型和水质扩散模型计算结果进行预选方案初步筛选的基础上,采用构建的离岸排污13选划决策模型对预选排污口方案进行比选,位于扁担港南侧llm水深处的2号预选排口方案综合最优,是射阳海域离岸排污13选划推荐方案。论文提出了离岸排污口预选原则,首次构建了开敞海域离岸排污口选划决策模型,是对开敞海域离岸排污13选划方法的探索与尝试。模型综合考虑了自然、工程、环境三个要素的相互影响,通过多目标决策方法最终对各预选方案进行优劣排序,确定最佳的排污口选划方案。本研究成果可为相关管理部门对开敝海域离岸排污VI的选划提供理论依据与技术支持,有利于合理利用海洋资源,提高海洋环境的管理水平。本研究丰富排污VI选划的研究方法和思路,对排污口比选设置及开敞海域环境容量等后续研究具有一定的借鉴作用。关键词:开敞海域,离岸排污口选划,决策模型,江苏射阳 Abstract Abstract Lifesewage and industrialwastewater discharged into theoffshore area after treatment is an important means ofmaking full use oftheMarine environment self-purification power and easing near-shore environmental pressures,and its gradually e the main way ofcoastal area isthepremise and foundation to realize thediscarded sewage emissions offshore ording to Marine naturalproperty,rational use ofoffshore environmental capacity,considering theengineering construction cosL andtheecological environment of thesurrounding seas,choose tooffshore sewage outlet in selecting ofdischarge e anurgent research topic inoff-shore waters. Reflected iniangsu area,forexample,we study ofthemethod ofhow toselect sewage outletinopen on theopen sea topography and hydrological characteristics,ecological environment,we puts forward selection 2 dtidal current model and diffusion model ofwater quality modeling diffusion of pollutants,get rid of the unreasonable using multi-objective decision—making theory model andmethod,establishe theselectofdischarge outletin off-shorewaters indexsystem,then establishtheselectofdischarge outletinoff-shore waters decision deploy 9discharge-outle