Author(s): Fong-Zuo Lee, Jihn-Sung Lai, Tsung-Hsien Huang, Cheng-Chia Huang, Zhi-Xian Yang, Yong-Jun Lin
Linked Author(s): Fong-Zuo Lee
Keywords: Flood plain, numerical simulation, channel conveyance, buildings and constructions, water stage
Abstract: It is usual to develop the flood plains along the riverside as a park or housing areas, especially in the highly urbanized areas. Due to limited land in the urban area, flood plains are subjected to be utilized as locations for recreation, exercise or parking space. Lack of flood plain management, flooding may happen frequently. When heavy rainfall occurs, overbank flow used to inundate the flood plains and increases the water stage due to increment of river bed roughness. In this study, the 2D numerical model, SRH-2D, is adapted to investigate the capability of channel conveyance due to the effect of buildings on the flood plains. The buildings and constructions decrease the cross-sectional area of flow on flood plains. The SRH-2D model is a hydraulic, sediment, temperature and vegetation model for river systems under development at the Bureau of Reclamation. It adopts robust and stable numerical schemes with seamless wetting-drying algorithm. The resultant outcome needs that few tuning parameters to arrive at the final solution. Based on various return period flood hydrographs, the SRH-2D is applicable to study the capability for channel conveyance and variation of the floodwater stage due to building effects
Year: 2017