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基于MIKE11模型结构和原理,将MIKE11模型应用于洪泉片(豫)防洪保护区洪水风险图编制项目中,模拟干流河道的溃堤洪水过程,从各频率间结果、溃口与河道断面过流能力、水量平衡和实测洪水模拟四个方面,验证模拟结果的合理性。结果表明,MIKE11模型能较好地模拟河道溃堤洪水过程。 相似文献
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基于MIKE11模型结构和原理,将MIKE11模型应用于洪泉片(豫)防洪保护区洪水风险图编制项目中,模拟干流河道的溃堤洪水过程,从各频率间结果、溃口与河道断面过流能力、水量平衡和实测洪水模拟四个方面,验证模拟结果的合理性。结果表明,MIKE11模型能较好地模拟河道溃堤洪水过程。 相似文献
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以开封市城市洪水风险图为背景,基于GIS、MIKE软件,将城市一维排水河网模型、二维地表产汇流模型和实际地下排水管网模型进行动态耦合,精确模拟开封市暴雨内涝积水过程、淹没演进过程、退水过程和泵站排水过程等。结果表明,模型计算得到的积水点位置、积水深度与现场实测数据基本吻合,说明模型构建方法合理,基本资料和计算参数选用可靠。 相似文献
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为快速准确模拟城市洪水淹没并分析其时空演化规律,基于元胞自动机洪水模拟软件Caflood建立济南城区二维洪水淹没模型,并对济南城区雨洪淹没进行模拟。利用5次代表性雨洪数据率定模型并通过3次代表性雨洪数据验证该模型;同时为分析不同地形复杂度下的模拟效果及效率,采取不同分辨率DEM数据对20170718特大暴雨进行模拟,并对不同分辨率的模拟结果与MIKE21模拟结果进行对比分析。结果表明,模型率定及验证结果平均误差为0.02m;20170718特大暴雨模拟图形化显示结果基本符合实际淹没情形;选取22个实测点,以10m分辨率DEM作为模型输入的Caflood模拟最大水深平均误差为0.21m,30m分辨率的模拟平均误差为0.33m,但30m分辨率DEM运行时间仅为10m分辨率DEM的1/15,而MIKE21模拟的平均误差为0.27m。由此可见该模型运行可靠、精度较高、能较好地反映洪水的运动特性,与其他分布式雨洪模型相比具有计算时间短、建模条件较低且适应性较好的特点,更适合城市洪水预警与应急预案。研究成果可为城市雨洪模拟与预报提供参考。 相似文献
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为模拟水库溃坝,以金牛山水库为例,在分析设计洪水和水库水位多种组合下利用MIKE软件模拟了主坝溃决后洪水在下游的演进过程,获得了淹没水深、淹没范围及流速等洪水风险信息,为金牛山水库下游防洪决策提供了依据。 相似文献
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The use of in-stream energy converters in rivers is an area of research that is still in its preliminary stages. The driving force of river flows is the potential energy the water gains when it precipitates on mountainsides, and this energy is traditionally converted by hydropower stations, where dams are used to create a larger head. Using an in-stream energy converter would be advantageous in areas restricted by regulation. In this paper the effects of using these converters on the upstream water level in a river are studied. This has been done both with an analytical model and with a numerical model. The analytical model described the water level increase due to energy capture to depend on how large fraction of the channel that is blocked by the turbine. It was also shown that as the converter induces drag on the flow, and as energy is lost in wake mixing, the total head loss will be a sum of energy capture and energy losses. The losses correspond to a considerable fraction of the total head drop. The numerical model was used to evaluate these results. The model used was the 3D numerical model MIKE from the DHI Group in Sweden. Turbines were modelled with an inbuilt function in the program. The results from the model did not correspond to the analytical results, as the energy capture was equal to the head drop in the program. 相似文献
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The aim of the present study is to provide an Atlas of IRAN Offshore Renewable Energy Resources (hereafter called ‘the Atlas’) to map out wave and tidal resources at a national scale, extending over the area of the Persian Gulf and Sea of Oman. Such an Atlas can provide necessary tools to identify the areas with greatest resource potential and within reach of present technology development.To estimate available tidal energy resources at the site, a two-dimensional tidally driven hydrodynamic numerical model of Persian Gulf was developed using the hydrodynamic model in the MIKE 21 Flow Model (MIKE 21HD), with validation using tidal elevation measurements and tidal stream diamonds from Admiralty charts. The results of the model were used to produce a time series of the tidal stream velocity over the simulation period.Moreover, to assess the potential of the wave energy in this site, a model was developed based on six-hourly data from a third generation ocean wave model (ISWM-Iranian Sea Wave Model) covering the period 1992–2003.To ensure the information provided to the Atlas is managed and maintained most effectively, all the derived marine resource parameters have been captured in a structured database, within a Geographical Information System (GIS), so enabling effective data management, presentation and interrogation. 相似文献
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鉴于我国中小河流常因测站不足,缺乏实测水文资料,导致精细的设计洪水推求和洪水演进计算难以进行,进而影响河流洪水风险分析准确性的问题,采用推理公式分区组合的方法推求各断面设计洪水,并将其作为MIKE 11模型的输入洪水过程,进行河道内洪水演进模拟计算。以大连市复州河下游段为例,模拟计算了主河道设计洪水演进过程。结果表明,该方法可动态演示洪水演进过程,并能给出洪水风险分析的主要指标,与现场实测流量和洪痕水位相比,模拟精度良好,对中小河流洪水风险分析及防洪管理具有一定的参考和指导意义。 相似文献