西安市污水资源化对水资源承载力的贡献研究

发布时间：2018-04-01 19:00

本文选题：污水资源化　切入点：西安市　出处：《西安建筑科技大学》2015年硕士论文

【摘要】：西安市作为西北干旱缺水地区的典型城市,随着城镇化的进程,水资源短缺和水环境污染问题日益严重。污水资源化具有开源节流的双重作用,一方面增加了供水总量,另一方面减少污染物的排放,缓解水质性缺水现状,通过这两个途径降低缺水程度,从而增强水资源对社会经济持续发展的支撑能力。在国外集中式和分散式污水资源化都已被广泛利用,但西安市污水资源化尚处于初级阶段,缺乏定量化的理论支撑与科学的污水资源化发展策略。这使得污水资源化对水资源承载力的贡献研究及发展策略的研究具重要意义。本研究正是基于以上现实问题,预测西安市污水资源化对水资源承载力的贡献并优选发展策略。本研究首先对西安市概况、水资源现状、水环境现状与污水资源化现状进行分析,探寻西安市污水资源化的前景。进而对水资源承载力系统进行研究,提出了水资源承载力系统构成的体系和层次,将该系统划分为社会、经济、水资源与环境四个子系统,探讨了再生水回用于各方向的可行性、对水资源承载力系统的多层次、复杂、时变、多重反馈等特点进行了分析讨论。分析分散式污水资源化及集中式污水资源化与社会、经济、水资源和环境各子系统变量的反馈关系,确立了变量之间的函数关系,建立了水资源承载力系统动力学模型,给出了模型中相关参数的计算方法,并运用直观检验、运行检验、历史检验等方法进行检验。运用该模型进行了延续现状模式下西安市2014~2030年水资源承载力的预测,并以不同的分散式污水资源化增长率和集中式污水资源化增长率作为决策变量,设计了六种西安市污水资源化发展方案并进行模拟预测,分析不同方案下西安市水资源承载力的变化,探究污水资源化对西安市水资源承载力的贡献,并选出集中式污水资源化和分散式污水资源化的最优发展策略。本研究得到2012年国家社会科学基金项目(12BGL083)的资助。
[Abstract]:Xi'an is a typical city in arid and water shortage area in northwest China. With the process of urbanization, water resources shortage and water environment pollution are becoming more and more serious.On the one hand, it increases the total amount of water supply, on the other hand, it reduces the discharge of pollutants, alleviates the present situation of water shortage, and reduces the degree of water shortage through these two ways.In order to enhance the sustainable development of water resources social and economic support capacity.Both centralized and decentralized wastewater resources have been widely used in foreign countries, but Xi'an sewage reuse is still in the primary stage, lacking of quantitative theoretical support and scientific development strategy of sewage reuse.This makes it important to study the contribution of sewage reuse to water resources carrying capacity and the research of development strategy.Based on the above practical problems, this study predicts the contribution of wastewater reuse to water resources carrying capacity in Xi'an city and optimizes the development strategies.In this study, the general situation of Xi'an, water resources, water environment and sewage resource status were analyzed, and the prospect of sewage reuse in Xi'an city was explored.Then the system of water resources carrying capacity is studied, and the system and level of water resources carrying capacity system are put forward. The system is divided into four subsystems: society, economy, water resources and environment.The feasibility of reclaimed water reuse in various directions is discussed. The characteristics of multi-level, complex, time-varying and multi-feedback of water resources carrying capacity system are analyzed and discussed.This paper analyzes the feedback relationship between decentralized sewage reuse and centralized sewage reuse and the variables of social, economic, water resources and environment subsystems, establishes the functional relations among variables, and establishes the system dynamics model of water resources carrying capacity.The calculation method of the related parameters in the model is given, and the methods of visual inspection, running test and historical test are used to test the model.The model is used to predict the carrying capacity of water resources in Xi'an from 2014-2030 under the model of continuation of current situation, and the growth rates of different decentralized sewage resources and centralized sewage resources are taken as decision variables.In this paper, six development schemes of sewage reuse in Xi'an are designed and simulated, and the changes of water resources carrying capacity in Xi'an under different schemes are analyzed, and the contribution of sewage reuse to water resources carrying capacity of Xi'an is explored.The optimal development strategies of centralized and decentralized sewage resources are also selected.This study was supported by the 2012 National Social Science Foundation Project No. 12 BGL083.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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