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基于地形坝体一体化三维场景的水库洪水淹没模拟
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作者 陈文君 陈锁忠 +1 位作者 杨军 马俊霆 《地理与地理信息科学》 CSCD 北大核心 2014年第2期16-19,25,F0002,共6页
提出一种无缝融合地形三角网与坝体虚拟现实模型、构建一体化水库库区三维场景的方法。基于真实连续的下垫面环境进行确定水位的淹没模拟,其中地形部分以迭代实现邻接扩展的淹没算法,坝体部分通过高程比较与体元轴对齐包围盒相交判断确... 提出一种无缝融合地形三角网与坝体虚拟现实模型、构建一体化水库库区三维场景的方法。基于真实连续的下垫面环境进行确定水位的淹没模拟,其中地形部分以迭代实现邻接扩展的淹没算法,坝体部分通过高程比较与体元轴对齐包围盒相交判断确定迎水面受淹形态。通过计算广义三棱柱及其变体的离散水体体积,求得水位对应库容,并构建二分查找判定树,以快速获取接受净入库洪量后的库区洪水淹没结果,并在三维场景中渲染表达。实验结果表明,基于地形坝体一体化三维场景的计算模拟方法,相比传统库容曲线与洪水风险图能够在展现库区洪灾影响范围的同时,兼顾坝体局部的淹没细节。 展开更多
关键词 水库洪水淹没 三维场景 地形三角网 坝体模型
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Inundation Calculation of the Coastal Narrow Plain Strip Impacted by Upstream Reservoir Flood Discharge in Rainy and Extreme Flood Conditions
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作者 Nguyen Ngoe Naml Le Van Nghi Bui Thi Ngan 《Journal of Shipping and Ocean Engineering》 2016年第3期165-178,共14页
In the context of current climate change, an abnormality of flooding is a common form of disaster in Vietnam. Hanh Stream reservoir has occurred great flood in 1986, 2010. In the future, the risk of flooding is possib... In the context of current climate change, an abnormality of flooding is a common form of disaster in Vietnam. Hanh Stream reservoir has occurred great flood in 1986, 2010. In the future, the risk of flooding is possible to happen again. In view of management of the risk of natural disasters: large flooding situation downstream is one of the most dangerous risks for the reservoir. Due to downstream of Hanh Stream reservoir is a narrow coastal plains, quick infrastructure development, especially interwoven road and railway systems, so that flood drainage ability will be affected greatly. The consciousness of risks that may be occurred in the future in order to propose preventive measures and proactive response to minimize damages always is the requirement for all projects. The hydrodynamic calculation, flooding maps, emergency plan to prevent flooding downstream of Hanh Stream reservoir is also needed. The article is raised the issue of requirements to calculate coastal narrow delta strip flooding in the Central of Vietnam when impacted by the upstream reservoir of flood discharge in terms of extreme heavy rain and flooding and presented computational methods of Mike software package for case flooded plain of Cam Ranh Bay in downstream reservoirs of Hanh Stream, Khanh Hoa Province, Vietnam. 展开更多
关键词 Reservoirs Hanh Stream maps INUNDATION narrow plain narrow delta coastal hydrodynamic calculation flood flooding.
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