| Summary: | 碩士 === 國立臺北大學 === 都市計劃研究所 === 107 === In recent years, due to the high development of the city, large areas of land in the city are covered by impervious layers, reducing the percentage of rainwater infiltration into the soil, increasing the reliance on drainage systems and flood control projects to prevent from flooding. The frequency of extreme rainfall events is increasing. If the rainfall event is beyond the capacity of flood control projects, the city will face higher disaster risks. In this context, the concept of runoff sharing emphasizes that runoff should be absorbed by land to increase storage space of runoff. The Green Infrastructure category include protected areas, forests, farmland, parks and river corridors, green belts, ecological corridors, etc. It is also a decentralized stormwater management network, such as Green roofs, trees, rain gardens, and permeable pavements reducing runoff through absorption and infiltration while providing opportunity of recreation. By using it as storage space and sharing of runoff, it is important for the design pattern of the green infrastructure to contribute to the effect of runoff sharing.
This study discussed the influences of the design pattern on Green Infrastructure for runoff. Taking the Sanchong and Luzhou areas as case study areas, due to there high urban development, this study focuses on discussing the influences of the design pattern on park and school for runoff. Using the Soil Cover Complex Method to estimate the spatial distribution of runoff depth, and field investigation of parks and schools, and the recordedflooding were used as the basis for designing scenarios. At last, through the simulation of three different scenarios, the results of runoff distribution were compared
The results of this study shows that by changing the design pattern of the green infrastructure, it will affect the flooding potential hazards and improving the runoff sharing efficiency of the green infrastructure. Through implementing both permeable pavement and recessed design facilities, it has the best effect on reducing flooding potential hazards and improving runoff sharing efficiency. It also shows that it has been able to significantly reduce the flooding potential hazards through the change of planning and design of public facilities. It is anticipated that this study results will provide a planning and design consultation for comprehensive review of urban planning, land use control, public facilities and open space.
|
|---|
