DEVELOPMENT OF A SIMULATOR FOR FLOOD DAMAGE MITIGATION, AND INVESTIGATION ON FLOOD DAMAGE MITIGATION EFFECTS OF FLUVIAL WOODS ZONE

防洪减灾模拟器的研制及河流冲积林区防洪减灾效果研究

基本信息

批准号：
21360237
负责人：
AKIYAMA Juichiro
金额：
$ 10.4万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

A numerical simulator was developed for simulating complex inundation processes by river water and inside a levee in urban area as well as analyzing economic evaluation of flood control measures. The simulator comprises(1) a distributed hydrological model for simulating rainfall-runoff process in watershed,(2) a 2D unsteady free-surface flow model, based on flux-difference splitting scheme and unstructured finite-volume method, for flood flows in rivers and inundation process,(3) a dynamic network model, based on flux-difference splitting scheme combined with the Preissmann slot, for sewer network, along with(4) inundation economic survey. The simulator was tested against the observed inundation processes in the Iizuka-city area in the Onga river basin in the Kyushu storm disaster in 2003, and then several simulations, which include inundation processes under hypothetical rainfall patterns, effects and economic evaluation of flood control measures and so on, were conducted. In addition, the effects of the fluvial wood zone in landside on overflow characteristics of flood flows were investigated experimentally, theoretically and numerically. A discharge formula, that includes both effects of characteristics of the wood zone and levees, was developed and validated through experimental and numerical investigations.

开发了数值模拟器，用于模拟城市地区河水和堤内复杂的淹没过程，并分析防洪措施的经济评价。该模拟器包括（1）用于模拟流域降雨径流过程的分布式水文模型，（2）基于通量差分裂方案和非结构化有限体积法的河流洪水流二维非定常自由表面流模型和淹没过程，（3）基于通量差分裂方案结合Preissmann槽的下水道网络动态网络模型，以及（4）淹没经济调查。该模拟器根据2003年九州风暴灾害中远贺河流域饭冢市地区观测到的洪水过程进行了测试，然后进行了多次模拟，其中包括假设降雨模式下的洪水过程、防洪措施的效果和经济评估等等，进行了。此外，还通过实验、理论和数值研究了陆侧河流林带对洪水溢流特性的影响。通过实验和数值研究开发并验证了流量公式，其中包括林区和堤坝特征的影响。