【作者】 刘芹；

【导师】 方国华；

【作者基本信息】 河海大学 ， 水利水电工程， 2006， 硕士

【摘要】 平原地区河网密布,洪水演进过程相当复杂,加之经济发达、人口众多,洪水灾害带来的经济损失和社会影响极为严重。防洪调度是防洪实践活动中的一项重要内容。因此,开展平原河网水力计算和闸群防洪体系优化调度研究具有重要的理论意义和实际应用价值。 本文在总结以往相关领域研究成果的基础上,根据平原河网水文、水力特性及闸群工作特点,应用系统论分析理论和方法,构建了多时段多闸联合防洪的闸群防洪体系优化调度模型,为研究闸群防洪体系优化调度问题提供了一种可行的方法。论文的主要内容包括: 1.综合分析我国防洪调度现状,系统评述国内外平原河网水力计算及防洪优化调度研究动态,指出开展闸群防洪体系优化调度研究的必要性。 2.简要评述洪水演算方法,结合平原环状河网水力特性,采用水力学方法建立一维非恒定流水动力模型,包括模型基本方程、模型定解条件、模型概化、模型参数确定、模型求解方法等。 3.系统描述防洪体系基本组成,深入分析平原闸群防洪体系优化调度的特点及问题的研究途径,并简述了动态规划的基本原理、具体特点及建模方法。 4.综合考虑洪水时、空变化特性及闸群调度特点,建立了多时段多闸联合防洪的闸群防洪体系优化调度模型。同时,采用动态规划前向递推方法对模型进行求解,并给出了求解步骤。 5.以宁波市北仑区为例,应用本文所建立的闸群防洪体系优化调度模型,在对该区河网进行水力计算的基础上,实现闸群防洪体系的优化调度,获得逐时段闸群运行的最优策略。结合计算成果对优化模型的合理性、可行性和适用性进行分析。 6.对论文取得的主要成果进行总结,并指出今后开展进一步研究的方向。更多还原

【Abstract】 Plain region enjoys closely covered river network where the process of flood routing is comparatively complex, while featuring with developed economy and large population, flood damage is inevitable to bring about wondrously serious economic losses and social influence in this region. Flood-control operation is one of important items in flood control practices and activities. Therefor, conducting research on hydraulic calculation and optimal operation of multi-sluice flood control system in plain river network region has very important significance for theories and great value in practice.Based on summarizing the existing study results in related domain, according to hydrological and hydraulic characteristics of plain river network as well as working performance of multi-sluice, a model for integrated flood control about optimal operation of multi-sluice system at several time interval is formulated by using analysis theory and method of system engineering in this paper, which provide a feasible means for research on the problem about optimal operation of multi-sluice flood control system. Major content is as follow-.1. Comprehensively analyzing the current situation of flood-control operation in our country, reviewing the research trend in the respect of plain river network hydraulic calculation and optimal flood control operation systematically, while the necessity of study on optimal operation of multi-sluice flood control system is point out.2. Briefly expounding flooding routing methods and combining hydraulic characteristic of plain looped river network, one-dimensional hydrodynamic model for unsteady flow is established by using hydraulics method, including base equation、 conditions for determining on solution、 model generalization、 the selection of model parameters and methods of acquiring model solution.3. Systematically describing the basic component of flood control system, deeply analyzing the characteristics of problem on the optimal operation of multi-sluice flood control system in plain and its studying approaches, while the primary fundaments and concrete traits of dynamic programming as well as the methods of establishing the model by using dynamic programming are introduced briefly.4. Considering the change of flood in time and space and the traits of multi-sluice operation generally, a model for integrated flood control about optimal operation of multi-sluice system at several time interval is formed, which is solved by using forward recursive method of dynamic programming. Meanwhile, the approaches to obtaining the solution are given.5. Taking Beilun region of Ningbo city as an example, on the basis of carrying on river network hydraulic calculation by applying the model established in this paper for optimal operation of multi-sluice flood control system, the multi-sluice optimization is realized and the optimal operation policy at each time interval is also got. With combination of results, the rationality 、 feasibility and applicability of model is analyzed.6. The major achievements in this paper are summed up, while pointing out the orientation of further study.更多还原