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http://dx.doi.org/10.13087/kosert.2019.22.6.115

Analysis of Rainfall Runoff Delay Effect of Vegetation Unit-type LID System through Rainfall Simulator-based Probable Rainfall Recreation  

Kim, Tae-Han (Dept. of Environmental Landscape Architecture, Sang Myung University)
Park, Jeong-Hyun (Dept. of Environmental Resources, Graduate School, Sang Myung University)
Choi, Boo-Hun (Dept. of Environmental Resources, Graduate School, Sang Myung University)
Publication Information
Journal of the Korean Society of Environmental Restoration Technology / v.22, no.6, 2019 , pp. 115-124 More about this Journal
Abstract
In a climate change environment where heat damage and drought occur during a rainy season such as in 2018, a vegetation-based LID system that enables disaster prevention as well as environment improvement is suggested in lieu of an installation-type LID system that is limited to the prevention of floods. However, the quantification of its performance as against construction cost is limited. This study aims to present an experiment environment and evaluation method on quantitative performance, which is required in order to disseminate the vegetation-based LID system. To this end, a 3rd quartile huff time distribution mass curve was generated for 20-year frequency, 60-minute probable rainfall of 68mm/hr in Cheonan, and effluent was analyzed by recreating artificial rainfall. In order to assess the reliability of the rainfall event simulator, 10 repeat tests were conducted at one-minute intervals for 20 minutes with minimum rainfall intensity of 22.29mm/hr and the maximum rainfall intensity of 140.69mm/hr from the calculated probable rainfall. Effective rainfall as against influent flow was 21.83mm/hr (sd=0.17~1.36, n=20) on average at the minimum rainfall intensity and 142.27mm/hr (sd=1.02~3.25, n=20) on average at the maximum rainfall intensity. In artificial rainfall recreation experiments repeated for three times, the most frequent quartile was found to be the third quartile, which is around 40 minutes after beginning the experiment. The peak flow was observed 70 minutes after beginning the experiment in the experiment zone and after 50 minutes in the control zone. While the control zone recorded the maximum runoff intensity of 2.26mm/min(sd=0.25) 50 minutes after beginning the experiment, the experiment zone recorded the maximum runoff intensity of 0.77mm/min (sd=0.15) 70 minutes after beginning the experiment, which is 20 minutes later than the control zone. Also, the maximum runoff intensity of the experiment zone was 79.6% lower than that of the control zone, which confirmed that vegetation unit-type LID system had rainfall runoff reduction and delay effects. Based on the above findings, the reliability of a lab-level rainfall simulator for monitoring the vegetation-based LID system was reviewed, and maximum runoff intensity reduction and runoff time delay were confirmed. As a result, the study presented a performance evaluation method that can be applied to the pre-design of the vegetation-based LID system for rainfall events on a location before construction.
Keywords
low impact development; rainfall runoff process simulation; system reliability analysis; design rainfall model; peak flow reduction;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 Aksoy, N.H..Unal, E..Cokgor, S..Gedikli, A..Yoon, JY..Koca, K..Inci, S.B. and Eris, E. 2012. A rainfall simulator for laboratory-scale assessment of rainfall-runoff-sediment transport processes over a two-dimensional flume. CATENA. 98: 63-72   DOI
2 Choi JY..Son YG..Lee SY..Lee YH. and Kim LH. 2013. Development of tree box filter LID system for treating road runoff. Journal of wetlands research. 15(3): 407-412. (in Korean with English summary)   DOI
3 Erdal, K..Ahmet, D. and Hayrullah, A. 2018. Rainfall simulator for investigating sports field drainage processes. Measurement. 125: 360-370   DOI
4 Huff, FA. 1967 Time distribution of rainfall in heavy storms, Water Resources Research, 3(4): 1698-1693
5 Huh. KY. 2003. Effects of Substrate Type, Soil Depth, and Drainage Type on the Growth of Sedum kamtschaticum in Extensive Green Roof Systems. Journal of Korean institute of landscape architecture, 31(4): 90-100 (in Korean with English summary)
6 Jang YS..Kim ME..Back JS. and Shin HS. 2014. The Study on Development and Verification of Rainfall-Runoff Simulator for LID Technology Verification. Journal of Korea Water Resources Association. 47(6): 513-522. (in Korean with English summary)   DOI
7 Ministry of Land, Infrastructure and Transport. 2011. A Study on the Improvement and Complementation of Precipitation Frequency (in Korean)
8 Kim. ME..Jang. YS..Nam. CH..Shin. HS. 2015. A Study on the Effectiveness Verification of Hydrological Cycle of Pervious Pavement using LID Simulator. Journal of Korea Water Resources Association. 48(5): 321-330 (in Korean with English summary)   DOI
9 Korea Institute of Green Infrastructure Co., Ltd., (2018) Development of Rainwater Penetration and Runoff Delay Technology for Urban Ecosystem Restoration. Research report to Small and Medium Business Administration(in Korean)
10 Lora, M.. Camporese, M. and Salandin, P. 2016. Design and performance of a nozzle-type rainfall simulator for landslide triggering experiments. CATENA, 140: 77-89   DOI
11 Ministry of Land, Infrastructure and Transport.Korea Institute of Civil Engineering and Building Technology. 2000. A Study on the Time Distribution of Design Rainfall by Region (in Korean)
12 Ministry of land, Transport and Maritime Affairs. 2012. A Study on the Calculation of Design Flood (in Korean)
13 Park. SS..Choi. JH..Park. BJ. 2016. Assessment of Plant Drought Tolerance for Extensive Green Roof. Korean journal of organic agriculture, 224(4): 787-795 (in Korean with English summary)   DOI
14 Yoon EH..Park JK..Shin HS. and Lee JH. 2017. Establishment of LID Demonstration Complex Monitoring System and Analysis of Storage Efficiency. Korea Society of Hazard Mitgation. 17(5): 345-353. (in Korean with English summary)   DOI
15 Song, JW..Im, JH. 2007. An Experimental Study on Runoff Reducing Effect of Infiltration-Storage System due to Rainfall Intensity. Journal of the Korean Society of Hazard Mitigation. 7(4): 85-95 (in Korean with English summary)