透過降雨歷線模擬城市排水系統效率之研究

The study of simulating efficiency of urban drainage system according to hydrograph and hyetograph.

洪瑋賢(Wei-Sian Hong)

指導教授 ： 董寧謙

共同指導教授 ： 韋家振(Wei Chia-chen)

健行科技大學/工學院/土木工程系空間資訊與防災科技碩士班/碩士(2015年)

摘要

由於氣候變化急遽，導致暴雨在台灣地區發生的機率有所提升，部分道路因此積水而癱瘓，本研究利用SWMM模擬都市下水道系統，藉以分析其排水效率，期望能協助相關單位進行改善。天壽公園在民國101年以前，因為附近的3959-G5(磺溪5)排水系統疏洪不佳導致水患成災，民國102年時增設排水側溝與連接管涵，將部分逕流輸往蘭興排水系統協助分洪，本研究將台北市水利工程處雨水下水道工程科提供的資料建構至SWMM模式中，並利用台北市5年一次的降雨事件模擬磺溪暴漲時，排水側溝增設前後的排水效率，其結果顯示增設連接管涵將導致兩排水系統的洪峰時間提前到來，但是3959-G5(磺溪5)排水系統的排洪速率有所提升；而蘭興排水系統的疏洪效率雖然有些微的下降，但整體流量卻下降0.9%。另外，從最大水位圖可以了解，∮0.6m的入水管渠已經無法承載更多的降雨，而增設的排水側溝不僅能容納多餘的逕流，設計的尺寸尚有足夠空間而不至於溢出，因此可以研判增設側溝有助於天壽公園周邊排水。

關鍵字

SWMM、天壽公園、降雨歷線、排水系統

並列摘要

Because of rapid climate change, the frequency of occurrence of rainfall increases in Taiwan. Part of the roads is impassable because of poor drainage. In this study, SWMM is used in the simulation of urban sewer systems. We hope to analyze the efficiency of the urban drainage system, and there can be helpful to the relevant units. In 2012 years ago, Tianshou park often has water standing because the drainage system NO. 3959-G5 is inefficient. In 2013, Taipei City Government had been build drainage ditches and culverts on drainage system NO. 3959-G5. In this study, we established the SWMM information are provided by the Hydraulic Engineering Office, Public Works Department, Taipei City Government, and using a 2-hour event with return periods of 5 years. The simulation results show that the flood peak of drainage system NO.3959-G5 ahead of time because of the construction of culverts, but the drain efficiency of drainage system NO.3959-G5 has improved.

並列關鍵字

SWMM, Tianshou park, hydrograph and hyetograph, drainage systems

參考文獻

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(3) American Society of Civil Engineering (ASCE) , “Design and Construction of Urban Stormwater Management Systems” , ASCE Manuals and Reports on Engineering Practice No. 77 and Water Pollut. Control Fed. Manual of Practice RD-20, New York, NY , 1992

(4) Bedient, P.B. , Huber, W.C. , “Hydrology and Floodplain Analysis” , 3rd Ed., Prentice-Hall, Upper Saddle River, NJ. , 2002

(5) City of Fort Collins, “Storm Drainage Design Criteria and Construction Standards” , Utilities Department, Stormwater Division, Fort Collins, CO. , 1984