防洪水利設施受損淹水數值模式之研發及應用─總計畫暨子計畫：都市雨水下水道系統受損淹水數值模式之研發(2/2)

Due to the economic growth, the urbanization at various areas in Taiwan is
significant. Hence, the urban hydrologic problem is getting important. The urban
storm sewer systems usually cannot meet the demand of the urban development. In
particular, during the rainy season, the overflow from the main sewers will result in
the surface inundation when the storms exceed the design capacity of the sewer
systems. The improper maintenance of the sewer systems or the damage of the
systems resulted from the natural disasters such as earthquakes may also result in
flooding. In order to investigate the urban inundation under the damage of storm
sewer systems, this project develop the inundation models. Then, the models are
applied to the study area.
This project is a subproject of an integrated project entitled “The development and
application of a flooding numerical model under the damages of flood-prevention
measures.” The objective of this project is to combine the 2D inundation model with
the storm-sewer system model. Then, the models are applied to simulate the urban
inundation under the damage of storm sewer systems. The study areas are the
Yung-Ho and Sin-Zwang areas in Taipei County. The urban inundation in the study
areas under the damages of the pumping stations is simulated. Comparison of the
simulated result with the flood hazard region is also performed.
The project will be performed in 3 years. In the first year, a 2D inundation model
and a storm-sewer system model have been established. The models have been
applied to simulate the urban inundation in the Sin-Zwang area. In the second year,
the numerical treatment of the pumping stations has been added to the developed
models. Then, the models have been applied to simulate the urban inundation in the
Yung-Ho area for the Herb typhoon. In the third year, the inundation simulation
under the damages of the pumping stations will be performed. Besides, the results of
all the subprojects will be integrated.