应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流...应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流量的排水状况,整个研究区淹没范围随时间的演变趋势和空间上的分布状况.研究结果表明,整个研究区现状防洪能力不足20a一遇设计标准,且研究区局部区域最大淹没深度超过2m,最大积水时间超过8h,是防洪排涝的重点区域.该结果可为下一步暴雨风险评估,滞洪区的选址和闸坝调度方案的制定提供参考依据.展开更多
Sensitivity analysis of thermal equilibrium parameters in the reservoir module of MIKE 11 model was conducted for the Wuxikou Reservoir in Jiangxi Province of China in order to apply the module to the environmental im...Sensitivity analysis of thermal equilibrium parameters in the reservoir module of MIKE 11 model was conducted for the Wuxikou Reservoir in Jiangxi Province of China in order to apply the module to the environmental impact assessment to accurately predict water temperature of reservoirs.Results showed that radiation parameter A and evaporation-first parameter were much more sensitive than other parameters.The values of the radiation parameter A ranged from 0.10 to 0.34.The values of evaporation-first parameter varied from 0 to 10.The sensitivity of solar absorption parameters was less than that of evaporation parameter,of which light attenuation values ranged from 0.5 to 0.7,and this parameter would not impact model results if it was more than 2.Constants in Beer's law ranged from 0.2 to 0.7.Radiation parameter B was not more sensitive than evaporation parameter and its reasonable range was higher than 0.48.The fitting curves showed consistent changing tendency for these parameters within the reasonable ranges.Additionally,all the thermal equilibrium parameters had much more important effects on surface water temperature than deep water temperature.Moreover,if no observed data could be obtained,the local empirical value would be used to input to the MIKE 11 model to simulate the changes in the discharged outflow-water temperature qualitatively.展开更多
文摘应用MIKE 11和MIKE 21分别构建北京市大兴区天堂河下游地区一维和二维水动力学模型,采用DHI MIKE FLOOD耦合模拟了不同暴雨重现期下该地区的淹没特性.为分析该地区暴雨洪涝灾害的危险性,研究模拟了不同情景下各骨干渠道考虑限制下泄流量的排水状况,整个研究区淹没范围随时间的演变趋势和空间上的分布状况.研究结果表明,整个研究区现状防洪能力不足20a一遇设计标准,且研究区局部区域最大淹没深度超过2m,最大积水时间超过8h,是防洪排涝的重点区域.该结果可为下一步暴雨风险评估,滞洪区的选址和闸坝调度方案的制定提供参考依据.
基金Under the auspices of Research&Development Special Fund for Public Welfare Industry of Ministry of Environmental Protection(No.201309062201309003)
文摘Sensitivity analysis of thermal equilibrium parameters in the reservoir module of MIKE 11 model was conducted for the Wuxikou Reservoir in Jiangxi Province of China in order to apply the module to the environmental impact assessment to accurately predict water temperature of reservoirs.Results showed that radiation parameter A and evaporation-first parameter were much more sensitive than other parameters.The values of the radiation parameter A ranged from 0.10 to 0.34.The values of evaporation-first parameter varied from 0 to 10.The sensitivity of solar absorption parameters was less than that of evaporation parameter,of which light attenuation values ranged from 0.5 to 0.7,and this parameter would not impact model results if it was more than 2.Constants in Beer's law ranged from 0.2 to 0.7.Radiation parameter B was not more sensitive than evaporation parameter and its reasonable range was higher than 0.48.The fitting curves showed consistent changing tendency for these parameters within the reasonable ranges.Additionally,all the thermal equilibrium parameters had much more important effects on surface water temperature than deep water temperature.Moreover,if no observed data could be obtained,the local empirical value would be used to input to the MIKE 11 model to simulate the changes in the discharged outflow-water temperature qualitatively.
