基于MIKE耦合模型的西苕溪洪水演进及风险分析
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摘要
为了评估浙江省安吉县西苕溪流域洪水风险,选取西苕溪干流长潭以下至长兴界之间河段作为研究区域。研究基于河道实测断面资料和2 m×2 m高精度DEM,构建了集MIKE 11、MIKE 21、MIKE FLOOD为一体的洪水淹没演进计算模型。利用水文学方法给定各个计算方案对应的模型边界条件,计算了不同量级洪水下的淹没水深、范围、历时等风险要素。经验证及合理性分析,该模型概化方法和参数选用合理,成果满足精度要求,从而能为研究区防洪减灾、风险管理提供技术支撑。
In order to evaluate the flood risk of Xitiaoxi Watershed in Anji County, Zhejiang Province, the main stream between Changtan and Changxing is taken as study area. A flood routing model integrating MIKE 11, MIKE 21 and MIKE FLOOD is established based on the measured river section data and high-precision DEM of 2 m × 2 m. The boundary conditions corresponding to each computation scheme are given by hydrological methods respectively. Afterwards, the risk elements such as submerged depth, range and duration are calculated under the floods with different magnitudes. The verification and rationality analysis show that the generalization method and parameters of model are rational, and the accuracy of results can meet requirements. The model can provide technical support for the flood control and disaster reduction and risk management in study area.
In order to evaluate the flood risk of Xitiaoxi Watershed in Anji County, Zhejiang Province, the main stream between Changtan and Changxing is taken as study area. A flood routing model integrating MIKE 11, MIKE 21 and MIKE FLOOD is established based on the measured river section data and high-precision DEM of 2 m × 2 m. The boundary conditions corresponding to each computation scheme are given by hydrological methods respectively. Afterwards, the risk elements such as submerged depth, range and duration are calculated under the floods with different magnitudes. The verification and rationality analysis show that the generalization method and parameters of model are rational, and the accuracy of results can meet requirements. The model can provide technical support for the flood control and disaster reduction and risk management in study area.
引文
[1]李帅杰.城市洪水风险管理及应用技术研究[D].北京:中国水利水电科学研究院,2013.
[2]程晓陶.关于洪水管理基本理念的探讨[J].中国水利水电科学研究院学报,2004(1):006.
[3] MARK O, WEESAKUL S, APIRUMANEKUL C, et al. Potential and limitations of 1D modelling of urban flooding[J]. Journal of Hydrology,2004,299(3-4):284-299.
[4] SCHMITT T G, THOMAS M, ETTRICH N. Analysis and modeling of flooding in urban drainage systems[J]. Journal of Hydrology,2004,299(3-4):300-311.
[5]张新华,隆文非,谢和平,等.任意多边形网格2D FVM模型及其在城市洪水淹没中的应用[J].四川大学学报:工程科学版,2007,39(4):6-11.
[6]田福昌,赵胤懋,苑希民.基于MIKE FLOOD耦合模型的塔洋河下游洪水演进分析[J].南水北调与水利科技,2018,16(5):16-20,84.
[7]张艳,梁忠民,李大洋,等.基于MIKE模型的叶尔羌河洪水风险要素计算[J].水电能源科学,2018,36(9):60-63.
[2]程晓陶.关于洪水管理基本理念的探讨[J].中国水利水电科学研究院学报,2004(1):006.
[3] MARK O, WEESAKUL S, APIRUMANEKUL C, et al. Potential and limitations of 1D modelling of urban flooding[J]. Journal of Hydrology,2004,299(3-4):284-299.
[4] SCHMITT T G, THOMAS M, ETTRICH N. Analysis and modeling of flooding in urban drainage systems[J]. Journal of Hydrology,2004,299(3-4):300-311.
[5]张新华,隆文非,谢和平,等.任意多边形网格2D FVM模型及其在城市洪水淹没中的应用[J].四川大学学报:工程科学版,2007,39(4):6-11.
[6]田福昌,赵胤懋,苑希民.基于MIKE FLOOD耦合模型的塔洋河下游洪水演进分析[J].南水北调与水利科技,2018,16(5):16-20,84.
[7]张艳,梁忠民,李大洋,等.基于MIKE模型的叶尔羌河洪水风险要素计算[J].水电能源科学,2018,36(9):60-63.