Sensitivity evaluation of the flash flood warning system introduced to ungauged small mountainous basins in Korea

Yoo, Chulsang; Lee, Jinwook; Chang, Kwon-Hee; Yang, Dongmin

doi:10.1007/s11629-018-4984-4

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Examples of operating systems include the use of variational echo tracking [136,137] and combinations of the traditional Horn and Schunck approach with the Lucas-Kanade method [138].…”

Section: Motion Tracking Functions Based On Optical Flow Techniques Have Long Been Explored For Reementioning

confidence: 99%

Recent Advances in Real-Time Pluvial Flash Flood Forecasting

Zanchetta

Coulibaly

2020

Water

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Recent years have witnessed considerable developments in multiple fields with the potential to enhance our capability of forecasting pluvial flash floods, one of the most costly environmental hazards in terms of both property damage and loss of life. This work provides a summary and description of recent advances related to insights on atmospheric conditions that precede extreme rainfall events, to the development of monitoring systems of relevant hydrometeorological parameters, and to the operational adoption of weather and hydrological models towards the prediction of flash floods. With the exponential increase of available data and computational power, most of the efforts are being directed towards the improvement of multi-source data blending and assimilation techniques, as well as assembling approaches for uncertainty estimation. For urban environments, in which the need for high-resolution simulations demands computationally expensive systems, query-based approaches have been explored for the timely retrieval of pre-simulated flood inundation forecasts. Within the concept of the Internet of Things, the extensive deployment of low-cost sensors opens opportunities from the perspective of denser monitoring capabilities. However, different environmental conditions and uneven distribution of data and resources usually leads to the adoption of site-specific solutions for flash flood forecasting in the context of early warning systems.

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“…Examples of operating systems include the use of variational echo tracking [136,137] and combinations of the traditional Horn and Schunck approach with the Lucas-Kanade method [138].…”

Section: Motion Tracking Functions Based On Optical Flow Techniques Have Long Been Explored For Reementioning

confidence: 99%

Recent Advances in Real-Time Pluvial Flash Flood Forecasting

Zanchetta

Coulibaly

2020

Water

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“…Therefore, early warning and forecasting systems are an important component of the flood control system and an important means to effectively reduce the number of victims and material losses related to flood control. In recent years, a large number of scholars have conducted relevant research (Mosey et al, 2019;Yoo et al, 2019;Li et al, 2023;Wang et al, 2023). Georgios et al (2022) combined one-dimensional modeling with two-dimensional modeling using the HEC-RAS model to simulate a disastrous flash flood in the town of Mandra, in Attica, Greece, in November 2017.…”

Section: Introductionmentioning

confidence: 99%

Influence of different rainfall patterns and soil water content on hydrological processes in small watersheds

Li,

Bao

et al. 2023

Front. Environ. Sci.

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Introduction: Due to climate and underlying surface changes, flash floods occur frequently in northwest China, and the extreme rainstorm weather and flash floods along the eastern foot of Helan Mountain are increasing.Method: By constructing a hydrological model to simulate ten historical mountain flood events in the Suyukou watershed of the eastern foot of Helan Mountain, this study explores the constitutive relationship between rainfall and flood, evaluates accuracy, and analyzes errors. Six characteristic rain patterns were designed based on three parameters representing the position of rainfall peaks and the trend characteristics of rainfall, using 63 actual rainfall processes with a duration of 6 h selected from the rainfall stations of Suyukou watershed. Early warning indicators under different conditions were carried out based on the set of rain patterns.Results: The research results indicate that eight out of the ten simulated floods have passed the qualification test and the simulation results are good. The HEC-HMS hydrological model is suitable for simulating mountain floods in small watersheds and can provide good support for the simulation and early warning of mountain flood disasters.Discussion: Designing a rain pattern set based on actual data has put forward higher requirements for mountain flood warning and forecasting, making the warning more in line with the local actual situation and greatly improving the effectiveness of warning and forecasting.

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“…In Morocco, the flash hazard index (FHI) was used to generate the flood susceptibility mapping using rainfall, slope, flow accumulation, drainage network density, distance from rivers, permeability, and land use [11]. In the flash flood guidance provided by the US National Weather Service, the peak time of the hydrograph is a parameter that should be considered in the system [12]. In Korea, the modified flash flood index (MFFI) was developed based on the structure of the flood runoff hydrograph [5].…”

Section: Introductionmentioning

confidence: 99%

Flash Flood Susceptibility Assessment Based on Morphometric Aspects and Hydrological Approaches in the Pai River Basin, Mae Hong Son, Thailand

Chaithong

2022

Water

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Flash floods are water-related disasters that cause damage to properties, buildings, and infrastructures in the flow path. Flash floods often occur within a short period of time following intense rainfall in the high, mountainous area of northern Thailand. Therefore, the purpose of this study is to generate a flash flood susceptibility map using watershed morphometric parameters and hydrological approaches. In this study, the Pai River basin, located in Mae Hong Son in northern Thailand, is divided into 86 subwatersheds, and 23 morphometric parameters of the watershed are extracted from the digital elevation model (DEM). In addition, the soil conservation service curve number (SCS-CN) model is used to estimate the precipitation excess, and Snyder’s synthetic unit hydrograph method is used to estimate the time to peak and time of concentration. With respect to the rainfall dataset, in this study, we combined CHIRPS data (as satellite gridded precipitation data) with rainfall data measured within the study area for the runoff analysis. According to the analysis results, 25 out of 86 subwatersheds are classified as highly susceptible areas to flash floods. The similarities in the morphometric parameters representing watersheds in highly flash flood-susceptible areas indicate that this categorization included areas with high relief, high relief ratios, high ruggedness ratios, high stream frequencies, high texture ratios, high annual runoff, high peak discharge, low elongation ratios, and low lemniscates ratios.

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Sensitivity evaluation of the flash flood warning system introduced to ungauged small mountainous basins in Korea

Cited by 3 publications

References 23 publications

Recent Advances in Real-Time Pluvial Flash Flood Forecasting

Recent Advances in Real-Time Pluvial Flash Flood Forecasting

Influence of different rainfall patterns and soil water content on hydrological processes in small watersheds

Flash Flood Susceptibility Assessment Based on Morphometric Aspects and Hydrological Approaches in the Pai River Basin, Mae Hong Son, Thailand

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