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您的检索式：作者名="GUNHUI CHUNG"
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| 1 | Application of the shuffled frog leaping algorithm for the optimization of a general largescale water supply system显示文摘 | Gunhui Chung Lansey K | 2009 | Water Resour Manage2009，23，4： | 1 |
| 2 | COMPARISON OF THE HYDRO-CLIMATOLOGICAL CHARACTERISTICS FOR THE EXTRA-ORDINARY FLOOD INDUCED BY TROPICAL CYCLONE IN THE SELECTED RIVER BASINS显示文摘As the increased interesting on global warming and extreme water-related disasters, there are many countries which have been suffering from the extreme floods induced by tropical cyclones in East Asia. Therefore, in this study, the geographical and hydrometeolorogical characteristics and flood forecasting and warning systems in the selected basins from Thailand, Philippines, and South Korea are compared. Chao Phraya river basin, Pampanga river basin and Nakdong river basin are selected from Thailand, Philippines, and South Korea, respectively. As the results from the comparison, it was discovered that the different geographical and hydrometeolorogical characteristics delivers the different types of flood forecasting and warning systems in each basin. Due to the different geographical characteristics, the damage caused by the similar amount of monthly rainfall is different according to the historical records. This difference is expected to be caused by the different river regime coefficient and soil structures. The flood forecasting and warning systems in three basins are also different. South Korea has the centralized control system for the flood forecasting and warning, while the other basins have the more localized monitoring, forecasting, and warning procedures. In addition to the flood forecasting and warning system, according to the geographical characteristics, the density of the gauging stations is also different. The analyzed results might help the policy makers in the basins develop the adaptive flood forecasting and warning system considering the basin characteristics. In the further study, more investigation has to be done for the quantified results from the three basins. | DONGRYUL LEE BYUNGHWA OH HWIRIN KIM SANGHEON LEE GUNHUI CHUNG | 2013 | Tropical Cyclone Research and Review2013，2，1： | 0 |
| 3 | Modified analogue forecasting in the hidden Markov frameworkfor meteorological droughts显示文摘An analogue method(AM) is a nonparametric approach that has been applied to predict the future states of a dynamic system by following the evolution of the analogues in the historical archive. In this study, we proposed a hidden Markov model(HMM)framework for a modified analogue forecasting(MAF) approach for meteorological droughts in Korea. The unobservable(hidden) state process in the framework aims to model the underlying drought state, while the observation process was formed from the time series of the standardized precipitation index(SPI) as a drought index. Within the framework, the likelihood estimator was used as the measure of similarity between past SPI analogues and current data. The MAF approach was conducted on the selected analogues to make forecasts at lead times of one and three months. The proposed model was applied to five selected stations in Korea using the SPI data from 1973 to 2016. The forecasting performance of the proposed model was tested during the validation period(2003–2016) using several statistical criteria and it was compared to a persistence-based benchmark model. The results showed significant improvement in the forecasting capacity, and satisfactory performance for numerical SPI forecasting and categorical drought forecasting. The results also suggested that the proposed model was able to provide useful information for determining future drought categories for early drought warning with a lead time of up to three months. | CHEN Si CHUNG GunHui KIM Byung Sik KIM Tae-Woong | 2019 | Science China(Technological Sciences)2019，62，1： | 0 |
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