水利水电技术2018，Vol.49Issue(1)：52-59,8.DOI:10.13928/j.cnki.wrahe.2018.01.008
MIKE21二维非恒定流模型在北京市延芳淀湿地洪水影响分析中的应用
Application of MIKE 21 2-D unsteady flow model on analysis of flood impact from Yanfangdian Wetland in Beijing
摘要
Abstract
In order to study the impact from the planned Yanfangdian Wetland to be constructed on the floodplain of the North Grand Canal on the flood control safety of the river channel and then control the construction scale of the wetland without the increase of the peak flood outflow of the flood with the return period of 50 years from the North Grand Canal,a MIKE 21 2-D unsteady flow model for the North Grand Canal is established herein for simulating the flood routings of the flood with the return period of 50 years from the North Grand Canal before and after the construction of the wetland.The parameter rating of the model is made with the monitoring data of the "7.20 Flood" of the North Grand Canal occurred in 2016,and then the temporal and spatial variations of the hydraulic conditions therein,such as the water storage capacities of both the river channel and the floodplain,the water level of river channel,the flow velocity,the flow regime,etc.,under the condition of the flood with the return period of 50 years before and after the construction of the wetland are analyzed.The result shows that channel water storage capacity of the North Grand Canal is to be reduced along with the decrease of the magnitude of flood peak clipping by the construction of Yangfangdian Wetland within the floodplain,however,the planning requirement can be met through adjusting the elevation of the terrain elevation of the wetland.Meanwhile,the construction of the wetland raises the flood level of the North Grand Canal and changes the flow regime of flood,which has certain impact on the construction of the embankment for the river channel.The study result can not only provide the support of hydraulic condition for both the design and construction of Yanfangdian Wetland,but also can provide references for improving the river channel and revising the flood control pre-scheme for the North Grand Canal.关键词
延芳淀湿地/洪水影响分析/MIKE 21二维非恒定流模型Key words
Yanfangdian Wetland/flood impact analysis/MIKE 21 2-D unsteady flow model分类
水利科学引用本文复制引用
孙晓英,张建涛,张彤,李泽敏,巩媚..MIKE21二维非恒定流模型在北京市延芳淀湿地洪水影响分析中的应用[J].水利水电技术,2018,49(1):52-59,8.基金项目
北京市科技计划项目“通州地表水及地下水水质协同修复研究及示范”(Z161100004516015) （Z161100004516015）
