圖書典藏及影音數位平台

建築基地地面高程涉及建築物之防洪及基地排水問題，且為避免建築基地高程不足影響居住環境，甚至危及人民生命財產，建築法令對建築基地之高程有最低高度的規定，建築技術規則設計施工編第4條：「建築基地之地面應在當地洪水位以上，但具有適當防洪及排水設備，或其建築物有一層以上高於洪水位，經當地主管建築機關認為無礙安全者不在此限。」惟所指之當地洪水位，究係以地區之保護基準或外水防洪設施之設計基準為準，並無明確定義；且其於可重力排水之都市計畫區或地處低窪屬無法重力排水之都市計畫區，亦應有不同之標準。故辦理本研究研訂臺灣都市地區洪水基準線之適用標準與相關流程，可作為公共安全及建築防洪規範的重要指標。

Taiwan is located in a region highly sensitive to climate change. In recent years frequent occurrence of extreme rainfall events has threatened urban safety against floods. To establish a sustainable urban development, an urban must utilize both engineering and non-engineering measures to form a resilient city so that it can co-exist with water and not afraid of flooding.To enhance urban flood-protection resiliency, a 100-yr. return frequency flood, similar to that used in US, has been used to determine flood water level. The level is considered as the base flood elevation and the required level of flood protection. At the same time it will be used as the base for flood insurance rate and for building protection. Building foundation and underground entrance should be above the base flood elevation. In this case buildings will not be threatened in an event of 100-yr. return frequency flood.In this study, factors that should be considered in establishing the base flood elevations as well as the step by step procedures have been developed. In addition, feasibility of implementing the policy in Taiwan along with accompanying policies have been evaluated. The results may be used for future urban planning and by building administration organization in implementing base flood elevation.However, there are considerable differences between Taiwan and US on both environmental and administrative conditions. In this study SOBEK model was used to perform flood inundation modeling of Lingu drainage basin for 100 yr. return frequency floods. The base flood elevations were then drawn on streets and alleys and discussions were made on its application in Taiwan. In addition, rules and regulations related to base flood elevation were also established for possible future use. Implementation strategies for short, middle and long terms were also formulated for future references.