The Influence on Runoff Distribution Imposed by the LID Installed on New and Old Urban Catchments

• Main Authors: CHAO-TING KUO, 郭昭廷
• Other Authors: JEN-YANG LIN
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/3uf734

碩士 === 國立臺北科技大學 === 土木工程系土木與防災碩士班 === 106 === The traditional urban rainwater management system relies on road gullies and grey infrastructure (GI) to drain off rainfall runoff. Faced with the extreme precipitation resulted from global weather changes accompanied by the trend of urbanization, however, the natural ecosystem and the urban environment are deteriorating faster than ever. Many technologies have been developed to construct sponge cities. These technologies are founded on ecosystem, and are also known as low impact development technologies, aiming to manage storm water and to deal with the source of runoff in an attempt to solve the problems permanently. For this reason, various methods such as penetration, filter, storage, evaporation and delayed runoff are employed in order to minimize the impact resulted from rainstorm runoff. This study intended to integrate low impact development technologies into two urban Catchments, namely, Beitou-Shilin Technology Park and the adjoining Wenchang Drainage Area, in an attempt to solve the runoff issues. Presently, how to combine urban space planning, green infrastructure and the traditional hydraulic engineering together in order to solve the waterflooding issues has become a demanding task for the city government. For this reason, this study focused on how to reduce surface runoff in new and old urban areas, using the Storm Water Management Model (SWMM) developed by U. S. EPA to simulate and analyze the reduction of surface runoff. In this study, various rainfall patterns were employed as input conditions to simulate and examine the changes of total surface runoff, base runoff hydrograph and peak discharge before and after the development. By doing so, this study has observed the effectiveness of runoff reduction after LID is installed with native parameter as required by all applicable laws and ordinances.