Sun‐Kwon Yoon
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View article: Improving Typhoon-Induced Rainfall Forecasts Based on Similar Typhoon Tracks
Improving Typhoon-Induced Rainfall Forecasts Based on Similar Typhoon Tracks Open
Typhoons pose severe threats to coastal regions through destructive winds and extreme rainfall, with rainfall-induced flooding often causing more casualties and economic damage than wind damage alone. Accurate precipitation forecasting is …
View article: Assessing future urban flood hazard: A comprehensive approach to estimating the implications of future rainfall scenarios
Assessing future urban flood hazard: A comprehensive approach to estimating the implications of future rainfall scenarios Open
Estimating potential changes in future flood patterns based on anticipated changes in hydrological characteristics within the basin is crucial for mitigating flood damage and managing flood risk. In this study, nonparametric probability mo…
View article: Urban flood forecasting using a hybrid modeling approach based on a deep learning technique
Urban flood forecasting using a hybrid modeling approach based on a deep learning technique Open
Climate change is contributing to the increasing frequency and severity of flooding worldwide. Therefore, forecasting and preparing for floods while considering extreme climate conditions are essential for decision-makers to prevent and ma…
View article: Flooding time nomograph for urban river flood prediction: Case study of Dorim stream basin, Seoul
Flooding time nomograph for urban river flood prediction: Case study of Dorim stream basin, Seoul Open
Global climate change is intensifying flood damage in urban rivers. Notably, most small and medium‐sized urban rivers have a brief concentration period and are highly vulnerable to sudden heavy rains that lead to a rapid increase in water …
View article: Evaluating the Drainage Density Characteristics on Climate and Drainage Area Using LiDAR Data
Evaluating the Drainage Density Characteristics on Climate and Drainage Area Using LiDAR Data Open
The purpose of this study is to identify the relationship between drainage density and climate, as represented by the climate aridity index, and to understand the relationship between drainage density and drainage area. A total of 121 stud…
View article: The Definition of Perennial Streams Based on a Wet Channel Network Extracted from LiDAR Data
The Definition of Perennial Streams Based on a Wet Channel Network Extracted from LiDAR Data Open
This study assesses the characteristics of perennial streams using the dimensionless relationship between streamflow exceedance probability and the wet channel ratio based on a wet channel network extracted from light detection and ranging…
View article: Development of a Revised Multi-Layer Perceptron Model for Dam Inflow Prediction
Development of a Revised Multi-Layer Perceptron Model for Dam Inflow Prediction Open
It is necessary to predict dam inflow in advance for flood prevention and stable dam operations. Although predictive models using deep learning are increasingly studied, these existing studies have merely applied the models or adapted the …
View article: Exploring and Predicting the Individual, Combined, and Synergistic Impact of Land-Use Change and Climate Change on Streamflow, Sediment, and Total Phosphorus Loads
Exploring and Predicting the Individual, Combined, and Synergistic Impact of Land-Use Change and Climate Change on Streamflow, Sediment, and Total Phosphorus Loads Open
The present study predicts and assesses the individual, combined, and synergistic effect of land-use change and climate change on streamflow, sediment, and total phosphorus (TP) loads under the present and future scenarios by using the Soi…
View article: Seasonal Precipitation Variability and Non-Stationarity Based on the Evolution Pattern of the Indian Ocean Dipole over the East Asia Region
Seasonal Precipitation Variability and Non-Stationarity Based on the Evolution Pattern of the Indian Ocean Dipole over the East Asia Region Open
Non-linear behavioral links with atmospheric teleconnections were identified between the Indian Ocean Dipole (IOD) mode and seasonal precipitation over East Asia (EA) using statistical models. The analysis showed that the lower the lag tim…
View article: Changes in Intensity and Variability of Tropical Cyclones over the Western North Pacific and Their Local Impacts under Different Types of El Niños
Changes in Intensity and Variability of Tropical Cyclones over the Western North Pacific and Their Local Impacts under Different Types of El Niños Open
This study investigated the effects of El Niño events on tropical cyclone (TC) characteristics over the western North Pacific (WNP) region. First, TC characteristics associated with large-scale atmospheric phenomena (i.e., genesis position…
View article: Hydrometeorological Variability and Its Nonstationarity According to the Evolution Pattern of Indian Ocean Dipole over the East Asia Region
Hydrometeorological Variability and Its Nonstationarity According to the Evolution Pattern of Indian Ocean Dipole over the East Asia Region Open
In this study, we used statistical models to analyze nonlinear behavior links with atmospheric teleconnections between hydrometeorological variables and Indian Ocean Dipole (IOD) mode over the East Asia (EA) region. The analysis of atmosph…
View article: Remote Sensing-Based Rainfall Variability for Warming and Cooling in Indo-Pacific Ocean with Intentional Statistical Simulations
Remote Sensing-Based Rainfall Variability for Warming and Cooling in Indo-Pacific Ocean with Intentional Statistical Simulations Open
This study analyzed the sensitivity of rainfall patterns in South China and the Indochina Peninsula (ICP) using statistical simulations of observational data. Quantitative changes in rainfall patterns over the ICP were examined for both we…
View article: Estimation of the Future Probable Precipitation based on the Assumption of Non-Stationarity in Seoul
Estimation of the Future Probable Precipitation based on the Assumption of Non-Stationarity in Seoul Open
In this study, an estimation of the future probable rainfall in Seoul, Korea, was performed, using non-stationary frequency analysis according to climate change and it was compared with the current probable rainfall. Hourly rainfall data p…
View article: Inter-Seasonal Precipitation Variability over Southern China Associated with Commingling Effect of Indian Ocean Dipole and El Niño
Inter-Seasonal Precipitation Variability over Southern China Associated with Commingling Effect of Indian Ocean Dipole and El Niño Open
This study analyzed temporal and regional responses of precipitation to the Indian Ocean Dipole (IOD) over southern China and the differences between IOD-only and El Niño–southern oscillation–IOD cases. The Mann–Kendall test and intentiona…
View article: Identification of Hotspots of Rainfall Variation Sensitive to Indian Ocean Dipole Mode through Intentional Statistical Simulations
Identification of Hotspots of Rainfall Variation Sensitive to Indian Ocean Dipole Mode through Intentional Statistical Simulations Open
This study analyzed the sensitivity of rainfall patterns over the Indochina Peninsula (ICP) to sea surface temperature in the Indian Ocean based on statistical simulations of observational data. Quantitative changes in rainfall patterns ov…
View article: Sharp Interface Approach for Regional and Well Scale Modeling of Small Island Freshwater Lens: Tongatapu Island
Sharp Interface Approach for Regional and Well Scale Modeling of Small Island Freshwater Lens: Tongatapu Island Open
Sustainable management of small island freshwater resources requires an understanding of the extent of freshwater lens and local effects of pumping. In this study, a methodology based on a sharp interface approach is developed for regional…
View article: Verification of Initial Field of Very Short-Term Radar Rainfall Forecasts using Advanced System: A Case Study of Typhoon CHABA in 2016
Verification of Initial Field of Very Short-Term Radar Rainfall Forecasts using Advanced System: A Case Study of Typhoon CHABA in 2016 Open
In this study, initial field improvement study was conducted to improve the accuracy of radar-based very short-term forecasting systems for heavy rainfall. We estimated the radar rainfall using stratiform, convection, tropical and classifi…
View article: Non-Stationary Frequency Analysis of Future Extreme Rainfall using CMIP5 GCMs over the Korean Peninsula
Non-Stationary Frequency Analysis of Future Extreme Rainfall using CMIP5 GCMs over the Korean Peninsula Open
In this study, we performed stationary and non-stationary frequency analysis of daily rainfall extreme series based on climate change scenarios by CMIP5 (Coupled Model Intercomparison Project Phase5) 8 GCMs (General Circulation Models). We…
View article: Evaluation of GPM IMERG Applicability Using SPI based Satellite Precipitation
Evaluation of GPM IMERG Applicability Using SPI based Satellite Precipitation Open
In this study, the GPM (Global Precipitation Mission) IMERG (Integrated Multi-satellitE retrievals for GPM) rainfall data was verified and evaluated using ground AWS (Automated Weather Station) and radar in order to investigate the availab…
View article: Investigation of hydrological variability in the Korean Peninsula with theENSO teleconnections
Investigation of hydrological variability in the Korean Peninsula with theENSO teleconnections Open
This study analyzes nonlinear behavior links with atmospheric teleconnections between hydrologic variables and climate indices using statistical models during warm season (June to September) over the Korean Peninsula (KP). The ocean-relate…
View article: A Multi-sensor basedVery Short-term Rainfall Forecasting using Radar and Satellite Data - A Case Study of the Busan and Gyeongnam Extreme Rainfall in August, 2014-
A Multi-sensor basedVery Short-term Rainfall Forecasting using Radar and Satellite Data - A Case Study of the Busan and Gyeongnam Extreme Rainfall in August, 2014- Open
본 연구에서는 2014년 8월 부산 경남 집중호우 사례를 대상으로 레이더와 위성결합 Multi-sensor Blending 초단기 강우예측을 실시하였다. 레이더 최적 Z-R관계는 열대형 강수 Z-R관계식($Z=32R^{1.65}$)을 적용하였으며, 20 mm/h 이상의 강한 강우에서 강수량 추정 정확도가 향상됨을 확인하였다. 또한 60 mm/h 이상 강한 폭우사상에 대하여 천리안 위성자료와 레이더자료를 합성한 결과 정량강수 …
View article: Warm Season Hydro-Meteorological Variability in South Korea Due to SSTA Pattern Changes in the Tropical Pacific Ocean Region
Warm Season Hydro-Meteorological Variability in South Korea Due to SSTA Pattern Changes in the Tropical Pacific Ocean Region Open
본 연구는 열대 태평양지역 ENSO (El $Ni{\tilde{n}}o$-Southern Oscillation) 패턴 변화에 따른 우리나라 여름철(June-September, JJAS) 지역 수문변동 영향 분석을 위하여, 우리나라 5대강 113개 중권역의 강수량과 유출량 자료를 대상으로 합성편차 분석(Composit Analysis, CA)과 Student's t-test에 의한 유의성 검정을 실시하였다. 분석 결과, 유역별…
View article: Changes in Typhoon Activities and Regional Precipitation Variability over the Korean Peninsula according to Different Phases of El Niño
Changes in Typhoon Activities and Regional Precipitation Variability over the Korean Peninsula according to Different Phases of El Niño Open
We analyzed typhoon activities such as tropical cyclone (TC) genesis position, movement routes and central pressure of typhoons, and changes in local patterns of rainfall stemming from TCs passing through the Korean domain. The results sho…