水力发电学报2012，Vol.31Issue(6)：154-159,6.
计入湿地植物影响的滇池二维流场计算
Calculation of two-dimensional wetland plant-impacted flow field in Dianchi lake
摘要
Abstract
A depth-averaged 2D hydrodynamic model of ecosystem was developed in this work based on the comprehensive roughness of wetland determined by a flume experiment and some available information about Dianchi lake,such as the planning of ecological environment construction,the lake′s conditions of wetland plants and water area variation,and the previous studies.With this model,three types of flow fields were simulated to evaluate the effects of breakwater removing and ecological wetland construction and to analyze the flow field changes caused by wetland plants and different water boundaries.Results show that the breakwater removal for water area expansion produced little effect on the global water,but it caused significant changes in the local flow,due to its effects on the boundary location and the direction of wind-driven current.In the region between Fubao and Xishan of the north Dianchi,the average flow velocity was increased from 0.73cm/s to 1.18cm/s or by 61.6%,while in Kunyang of the south Dianchi,the velocity from 0.34cm/s to 0.57cm/s or by 67.6%.Velocity increase in the rest lake regions was quite small,from 1.22cm/s to 1.32cm/s or only by 8.2%.The impact of ecological wetland is limited within the wetland region of average flow velocity decreased by 67.4%(from 0.43cm/s to 0.14cm/s),while this impact is little in the rest regions with only a 4.7% decrease in their flow velocity(from 1.27cm/s to 1.21cm/s) on average.These results are valuable to the ecological environment restoring and construction of Dianchi lake.关键词
环境水力学/滇池湖泊/数值模拟/生态湿地/水动力学模型/流场Key words
environmental hydraulics/Dianchi lake/numerical simulation/ecological wetland/hydrodynamics model/flow field分类
建筑与水利引用本文复制引用
程浩亮,杨具瑞,芦振爱,凌祯,李君宁..计入湿地植物影响的滇池二维流场计算[J].水力发电学报,2012,31(6):154-159,6.基金项目
国家自然科学基金 （）
云南省自然基金 （）
云南省中青年后备人才 （）
水利部公益项目 （）
