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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : The study on flood reduction and securing instreamflow by applying decentralized rainwater retention...
The study on flood reduction and securing instreamflow by applying decentralized rainwater retention facilities for chunggyechun in seoul of korea
Author : Jae-Hyeon Park (1), Sang Mi Jun(2) Chang Geun Park (3)
ABSTRACT
Recently abnormal climate phenomena and urbanization causes the changes of the hydrological environment.
To restore the hydrological cycle in urban area some fundamental solutions such as decentralized rainwater management
system and Low Impact Development (LID) techniques may be choosed.
In this study, SWMM 5 was used to analyze the effects of decentralized stormwater retention for preventing the urban
flood and securing the instreamflow.
The Chunggyechun stream watershed(21.29㎢) which is located in Seoul city(Korea) and fully developed as urban area
was selected as the study watershed, and the runoff characteristics of urban stream with various methods of LID
techniques (Permeable pavement, small rainwater storage tank, large rainwater storage tank) were analyzed.
By the simulation results, the permeability of pavement materials and detention storage at the surface soil layer make high
effect to the flood discharge, and the initial rainfall retention at the rainwater storage tank effected to reduce the flood peak.
The peak discharge was decreased as 22% for the design precipitation.
Moreover the instreamflow was increased as 55% by using adequate LID techniques
These kind of data could be used as the basis data for designing urban flood prevention facilities, urban regeneration
planning in the view of the integrated watershed management.
File Size : 1,446,942 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 28/08/2015
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