应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流...应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流量的排水状况,整个研究区淹没范围随时间的演变趋势和空间上的分布状况.研究结果表明,整个研究区现状防洪能力不足20a一遇设计标准,且研究区局部区域最大淹没深度超过2m,最大积水时间超过8h,是防洪排涝的重点区域.该结果可为下一步暴雨风险评估,滞洪区的选址和闸坝调度方案的制定提供参考依据.展开更多
MIKE 21数值计算与分析软件是国际上比较成熟的DHI软件系列中关于水动力、波浪和泥沙输运等模型进行潮流场、代表波要素的波浪场和泥沙输运的数值模拟工具,在国内至少有上百个成功的工程实际计算实例.本文以作者正在进行的"长兴岛...MIKE 21数值计算与分析软件是国际上比较成熟的DHI软件系列中关于水动力、波浪和泥沙输运等模型进行潮流场、代表波要素的波浪场和泥沙输运的数值模拟工具,在国内至少有上百个成功的工程实际计算实例.本文以作者正在进行的"长兴岛附近海域原油码头项目——泥沙冲於"为工程背景,详细介绍了该计算软件的计算方法,将该数值计算软件的模拟结果与实际泥沙冲淤规律进行对比,二者符合较好,说明本文建立的数值模型可以成功地预测长兴岛附近海域泥沙淤积的规律,为工程设计单位提供指导.展开更多
Understanding, quantifying, and forecasting water flow and its behavior in environment is made possible by the use of computational hydraulics in conjunction with numerical models, which is one of the most powerful to...Understanding, quantifying, and forecasting water flow and its behavior in environment is made possible by the use of computational hydraulics in conjunction with numerical models, which is one of the most powerful tools currently available. It is made up of simple to complex mathematical equations having linear and/or nonlinear elements, as well as ordinary and partial differential equations, and it is used to solve problems in many areas. In the vast majority of cases, it is not useful to reach analytical solutions to these mathematical equations using conventional methods. In these settings, mathematical models are solved by employing a variety of numerical algorithms and associated schemes. As a result, in this manuscript, we will cover the most fundamental numerical approach, the Finite Difference Method (FDM), in order to reformulate the governing equations for water and sediment flow from a system of partial differential equations to a system of linear equations. As part of our analysis into the inner workings of a computer program known as MIKE 21C, we will attempt to gain a better understanding of the hydrodynamic processes that take place in major rivers in Bangladesh. In addition to that, we will go over some of the most commonly used morphological studies that have been conducted on Bangladesh’s major rivers, including morphological solutions that have been developed in response to water supply concerns.展开更多
文摘应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流量的排水状况,整个研究区淹没范围随时间的演变趋势和空间上的分布状况.研究结果表明,整个研究区现状防洪能力不足20a一遇设计标准,且研究区局部区域最大淹没深度超过2m,最大积水时间超过8h,是防洪排涝的重点区域.该结果可为下一步暴雨风险评估,滞洪区的选址和闸坝调度方案的制定提供参考依据.
文摘Understanding, quantifying, and forecasting water flow and its behavior in environment is made possible by the use of computational hydraulics in conjunction with numerical models, which is one of the most powerful tools currently available. It is made up of simple to complex mathematical equations having linear and/or nonlinear elements, as well as ordinary and partial differential equations, and it is used to solve problems in many areas. In the vast majority of cases, it is not useful to reach analytical solutions to these mathematical equations using conventional methods. In these settings, mathematical models are solved by employing a variety of numerical algorithms and associated schemes. As a result, in this manuscript, we will cover the most fundamental numerical approach, the Finite Difference Method (FDM), in order to reformulate the governing equations for water and sediment flow from a system of partial differential equations to a system of linear equations. As part of our analysis into the inner workings of a computer program known as MIKE 21C, we will attempt to gain a better understanding of the hydrodynamic processes that take place in major rivers in Bangladesh. In addition to that, we will go over some of the most commonly used morphological studies that have been conducted on Bangladesh’s major rivers, including morphological solutions that have been developed in response to water supply concerns.
