Analysis of a Conventional Huff Model at Seoul Station and Proposal of an Improvisation Method

Yoo, Chulsang; Na, Wooyoung

doi:10.9798/kosham.2019.19.2.43

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The difference can be found from the lower rainfall peak, 28.7 mm/10 min (=172.4 mm/h). Lastly, we derived the second quartile 50% Huff model as it is found to be the most frequent pattern observed in Korea among the four types of Huff models [70][71][72]. Hence, the Huff model had a peak rainfall intensity ahead of the center of the storm duration with a value of 7.6 mm/10 min (=45.4 mm/h).…”

Section: Impact Of Rainfall Pattern On Slope Stabilitymentioning

confidence: 99%

Influence of Rainfall Pattern on Wetness Index for Infinite Slope Stability Analysis

Jun

Kim

2023

Water

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Landslides are one of the riskiest disasters combining excessive rainfall and unstable slope that a wetness index can quantify. The wetness index generated by water infiltration considering the rainfall pattern such as cumulated rainfall, rainfall duration and rainfall intensity should be estimated for the slope stability analysis. Even though the infiltration capacity of soils has been largely focused to evaluate the slope stability, the temporal patterns of rainfall have commonly been ignored or assumed as a steady state for the prediction of the slope failure in the previous studies. Thus, this study focuses more on evaluating the influence of various rainfall patterns on the slope stability, and compares it with an actual landslide incident that occurred in 2011, in Korea. The factor of safety (FS) considering the time-dependent wetness index variation is used to determine the slope stability. For the various rainfall designs, the uniform rainfall distribution, Yen and Chow, Mononobe, alternating block and second quartile Huff models are adopted. Thereafter, the FS variations from five models are compared with an actual landslide incident in Seoul, Korea. Among the rainfall designs, the models that consider the abrupt rainfall intensity capture the landslide time with an FS < 1. Therefore, the appropriate adoption of a rainfall distribution model should be highlighted for landslide prediction.

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Section: Impact Of Rainfall Pattern On Slope Stabilitymentioning

confidence: 99%

Influence of Rainfall Pattern on Wetness Index for Infinite Slope Stability Analysis

Jun

Kim

2023

Water

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“…The second quartile of the Huff method was used for the synthetic rainfall distribution [47], following the method proposed by the Ministry of Land, Transport, and Maritime Affairs (2011) [48]. The reason for using the second quartile is that in the estimation of flood quantity, if effective rainfall calculation method is used, much of the peak of the synthetic rainfall hyetograph is treated as a loss due to the initial loss impact in the initial first and second quartiles, so the flood quantity may be estimated to be relatively small [49].…”

Section: Generation Of Synthetic Rainfall Datamentioning

confidence: 99%

Developing a Reliability Index of Low Impact Development for Urban Areas

Yangho

Lee

2020

Water

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A defining characteristic of the urbanization is the transformation of existing pervious areas into impervious areas during development. This leads to numerous hydrologic and environmental problems such as an increase in surface runoff due to excess rainfall, flooding, the deterioration of water quality, and an increase in nonpoint source pollution. Several studies propose supplementary measures on environmental change problems in development areas using the low impact development technique. This study investigated the reduction of nonpoint source pollutant loads and flooding in catchments through urban catchment rainfall–runoff management. For the quantitative assessment of flood disasters and water pollution problems, we propose a reliability evaluation technique. This technique refers to a series of analysis methods that determine the disaster prevention performance of the existing systems. As the two factors involve physical quantities of different dimensions, a reliability evaluation technique was developed using the distance measure method. Using the storm water management model, multiple scenarios based on synthetic rainfall in the catchment of the Daerim 2 rainwater pumping station in Seoul, South Korea, were examined. Our results indicate the need for efficient management of natural disaster risks that may occur in urban catchments. Moreover, this study can be used as a primary reference for setting a significant reduction target and facilitating accurate decision making concerning urban drainage system management.

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A Study on the Improvement of Reliability Estimation Method for Sewer Network considering Resilience

김¹,

송²,

이³

2020

J. Korean Soc. Hazard Mitig

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In city centers, the damage caused by inundation is aggravated by rising populations and urbanization, which extend impermeable areas. Research is needed to identify the inundation risks caused by climate change and quantitatively assess the consequences. In this study, we proposed an improved reliability study which considers resilience in the original evaluation method for the reliability of a storm sewer network. Rainfall-runoff analysises were performed on a part of Bangbae 2 drainage basin in Seoul by applying Storm Water Management Model 5 Ver. Based on the results of the application of excessive rainfall events, the original reliability evaluation method was compared with the improved reliability evaluation method. Consequently, the effect of the improvement of the cluster about 30% was confirmed when selection the central value rather than the existing representative value. The improved reliability evaluation method proposed in this study can be used as a design objective function and as an index for evaluating the inundation risk in adjacent drainage basins.

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Analysis of a Conventional Huff Model at Seoul Station and Proposal of an Improvisation Method

Cited by 3 publications

References 20 publications

Influence of Rainfall Pattern on Wetness Index for Infinite Slope Stability Analysis

Influence of Rainfall Pattern on Wetness Index for Infinite Slope Stability Analysis

Developing a Reliability Index of Low Impact Development for Urban Areas

A Study on the Improvement of Reliability Estimation Method for Sewer Network considering Resilience

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