国际水文科学协会 PUB 研究计划“洪水预报和水资源评估新方法”学术研讨会，北京·清华大学， 2006 年 9 月 28 ～ 30 日

Simulation of “6.10” Storm Flood using a 2-D Hybrid Approach in Shalan watershed in Heilongjiang Province

Chong Li 1 , Jikang Lu 2 , Baisheng Ye 3

1 Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

2 Department of Flood Disaster, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

3 Cold and Arid regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China

Abstract: Using supposed rainfall process of “6.10” storm in Shalan catchment and extracted drainage network from raster DEM with 90-m resolution, a hybrid approach which combining simplified hydrology process with 2-D hydraulic model was developed and used to simulate the storm flash flood in Shalan river basin in Heilongjiang Province. The result shows, the maximum flood discharge in outlet is 415 , the maximum water depth nearby the Shalan town is 1.3m, flash flood lasting period is 5~6 hr, and 1~2 hr for water depth over 1 m at the same location. The flood zone mainly locates along the Shalan River with the width of 500m. Though default of flood observation and remote sensing data, the simulation shows reasonable agreement with real situation. The results imply that the proposed approach are apt to simulate storm flash flood with reliable resolution in mountainous area or valleys, it can served as a new tool for analysis of national storm flash flood in mountainous area or valleys.

Keywords: DEM; Hybrid approach; Storm flash flood; Shalan catchment