Study on Guidelines and modeling for Living with water Area-A case of the Houjin river

• Main Authors: Yu-ChiehLin, 林玉潔
• Other Authors: Han-Liang LIN
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/79csc2

碩士 === 國立成功大學 === 都市計劃學系 === 102 === Climate change increases the degree of damages from heavy rainfalls. Since disasters are becoming regular events, how to survive in cities with high risks of flooding is the question to be answered. Several countries have been stressing on the importance of managing land use and human activities to reduce damages from disasters. The ideology for disaster reduction changed from structural to non-structural and zoning is considered to be an efficient tool for reducing disasters. Taiwan has high rate of land use, especially in the cities. As there are no methods to return the lands to the rivers for preventing disasters, “living with water” is the best strategy to approach. “Living with water” has recently become one of the concepts in flood mitigation. This study aims to utilize the concept of living with water in land use and urban planning for flooding areas. To do so, this study integrates the criteria of living with water from projects in the Nederland, Japan, and Germany and chose to operate from the aspects of hazard and vulnerability in the risk theory. Variables associated with the risk map for living with water are selected for operating the risk map afterward. Finally, this study defines living with water as “urban residential or industrial areas that are prone to flooding could co-exist in the same space with accepting degree of risks”. Recall the definition, this research combines hydraulic planning and urban planning tools to guide the process of selecting the areas to be planned as water coexisting regions. The design operates with two mechanisms: first, identify risk areas, and second utilize urban development. The first phase uses the physiographic inundation modal to generate potential flooding and hazard map as the base of risk map. The variables for the vulnerability map are selected from the projects, which include residential density, distance to river and ocean, and economic loss. The second phase uses the risk map to plan the regions with the concept of living with water. This study assumes moderate risk flooding as the criterion for co-existence in high risk areas. The depth of water is also assumed to estimate the size of the lands needed for water retaining in high risk areas. Lastly, legal land use ratio for public facility is used to estimate areas that could be developed to achieve the goal of living with water.