南華大學永續農場水土保持規劃設計之研究

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Title:	南華大學永續農場水土保持規劃設計之研究
Other Titles:	Planning and Design of Soil and Water Conservation for Sustainable Farm in Nanhua University
Authors:	王景田 WANG, CHING-TIEN
Contributors:	科技學院永續綠色科技碩士學位學程林文賜 LIN, WEN-TZU
Keywords:	環境永續;水土保持;洪峰計算 Environmental sustainability;Soil and water conservation;Peak flow calculation
Date:	2020
Issue Date:	2022-05-23 15:37:11 (UTC+8)
Abstract:	近年來因全球暖化導致氣候變遷，臺灣地區極端降雨事件亦跟著大幅增加，其中暴雨集中易造成山坡地洪水及土砂災害，為有效降低坡地開發對環境生態產生衝擊，完整之水土保持規劃設計與施工，可讓山坡地生態環境永續發展。本研究以南華大學北側永續農場為研究地區，以水土保持相關法規為依據，結合地形高程資料、地質、土壤及中央氣象局之年平均雨量等資料，並透過環境基地現況調查，進行簡易水土保持規劃設計，包括排水及滯洪設施配置、等高線分析、集水分區劃分、降雨頻率及降雨強度分析、合理化公式之洪峰逕流量計算、排水斷面及沉砂滯洪設施計算及挖填方計算等項目。排水設施斷面係計算集水區25年重現期之洪峰逕流量為0.672cms，而永久沉砂滯洪池需求容量為216.27m3，係估算50年重現期之洪峰逕流量為0.736cms，施設後滯洪池容量為261m3大於需求量，依規採簡易水土保持設施申報及設置均符合法規規範，可作為基地開發前施設之參考，以期能符合山坡地保育水土資源、涵養水源、減免災害，促進土地合理利用及環境永續理念。　　Recently, due to the concentrated rainstorms induced by global climate change, floods and the debris-related disasters were easily triggered on mountainous hillslopes. In order to effectively reduce the impact of slope development on ecological environment, reasonable planning and design of soil and water conservation becomes necessary. Sustainable Farm in Nanhua University was used as studied area. Based on regulations of soil and water conservation, digital elevation models, geology, soil and climate data coupled with studied area investigation were applied for the calculation of facilities safety, including contour analysis, watershed delineation, rainfall frequency analysis and peak flow calculation. The cross-section of the drainage facilities was calculated to have a peak flow rate of 0.672 cms during the 25-year recurrence period of the catchment area, while the demand capacity of the permanent sedimentation detention pond was 216.27 m3, and the estimated peak flow rate during the 50-year recurrence period was 0.736 cms, and the capacity of the detention pond after installation was 261 m3 greater than the demand. The evaluated results show the safety of the planned facilities is reasonable and can be used for the reference of sustainable environmental planning and design.
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