The feasibility analysis of runoff reuse on freeway -- National freeway No.3 Jiouru Changjhih section

• Main Authors: Cheng-De Chang, 張正德
• Other Authors: J-M Leu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/08548708225500991507

碩士 === 國立成功大學 === 水利及海洋工程學系專班 === 96 === In view of Taiwan high average annual rainfall reaching 2,485mm which is 2.7-fold over globe average annual rainfall, with respects to the amount of 78% rainfall in the abundant rainfall period (May to October), wet and dry seasons are not even throughout the year, river flowing steep hill rapidly, 80% runoff of river flowing into sea, under the condition of uneven yearly rainfall and conventional water resource falling to meet the requirements, thinking how to make use of various water retention and storage technigues to increase useful water resource is an urgent task, it is also the purpose of the research. Among conventional water retention facilities, the rainwater retention type set in residential buildings, parking lots, campus, parks and roofs etc. is mostly seen. This research aims to collect rainfall by making good use of highway impermeable surface, draining rainfall through piping system into ground retention facilities efficiently to reinforce rainfall retention, help absorbing into the ground and lessening the amount of runoff to reach the retention purpose and help supplying of running water, to make proper use of water resource effectively. According to the statistic analysis result on this research, annual rainfall retention amount reach to 143,591m3, so this is a simple and effective method in increasing water resource. Besides, it also offer flood detention, storage and disaster prevention multi-function in environmental protection benefit.