System planning and simulation of automatic runoff pollution control in urban drainage system

• Main Authors: Chi-You Tsai, 蔡期有
• Other Authors: 林正芳
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/54135989982400862718

碩士 === 國立臺灣大學 === 環境工程學研究所 === 94 === First flush resulting from urban surface runoff is recognized as one of the major causes of quality deterioration in the receiving water bodies. Accordingly, an auto-control system is planned in this study to manage the runoff pollution in a real-time control in an urban drainage system. To understand the first flush phenomenom and to simulate the controlling efficiency, an auto-control system has been constructed. The storm water management model was employed to simulate runoff quality and hydrography for Liuguan in Taipei. The input conditions include different rainfall frequency (2, 5, 10, 25 and 50 years), rainfall duration (60, 90 and 120 minutes) and antecedent dry weather period (7 and 14 days), which were found to be the most important parameters influencing the first flush load of suspended solids. Moreover, the mass balance equation is used to calculate the water quality of the receiving water bodies. The results of simulations show that the auto-control system could effeciently reduce the nonpoint pollution which discharges into the receiving water bodies.