A Proposed Method for Calculating the Rainfall Threshold Based on the Multi-Method to Provide Heavy Rain Disaster Impact Information
Abstract
:1. Introduction
2. Theoretical Background
2.1. Threshold Rainfall Calculation Based on the Multi-Method
2.2. Threshold Rainfalls in Standard Watershed Units
2.3. Grid-Based Threshold Rainfalls in Urban Areas Using the G2G Method
3. Calculation and Verification of Threshold Rainfalls
3.1. Results of Threshold Rainfall Calculation for Standard Watershed Units
3.2. Grid-Based Threshold Rainfall Calculation for Urban Areas Using the G2G Method
3.3. Result of the National Threshold Rainfall Estimation
3.4. Selection of Events for Threshold Rainfall Verification
3.5. Verification of Threshold Rainfalls Using Actual Damage Data
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Term | Description |
---|---|
Threshold discharge | When analyzing a standard watershed unit, which is a non-urban area analysis method, threshold discharge refers to the maximum outflow of the relevant basin. If the rainfall exceeds the marginal outflow, damage occurs in the relevant basin. |
Rainfall–runoff curve | A curve showing the relationship between rainfall and runoff. |
Receptor | In this study, receptors are people, vehicles, and facilities were selected as objects, and the impacts of each object correspond to walking, traffic, and buildings. |
Threshold rainfall | Rainfall that causes inconvenience to the daily life of a receptor due to rainfall. |
Rainfall–depth curve | The amount of rainfall that causes the depth of flooding that affects an object due to rainfall. The depth of flooding for each object is assumed for walking (0.1 m), traffic (0.2 m), and building (0.5 m). |
Design flood | Flood volume used in the design of water structures such as dams and river structures. |
Around Daechi Station | ||||||||
Time | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 0 | 28 | 42.5 | 45 | 22 | 8.5 | 20 | 18.5 |
Flood depth (m) | 0 | 0 | 0.1 | 0.1 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 | 03:00 |
Accumulated rainfall (mm/3 h) | 40.5 | 118.5 | 199.5 | 244 | 170 | 86 | 22.5 | 26 |
Flood depth (m) | 0.1 | 0.3 | 0.6 | 0.7 | 0.5 | 0.2 | 0 | 0 |
Around Gangnam Station | ||||||||
Time | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 0 | 28 | 42.5 | 45 | 22 | 8.5 | 20 | 18.5 |
Flood depth (m) | 0 | 0 | 0.1 | 0.1 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 | 03:00 |
Accumulated rainfall (mm/3 h) | 40.5 | 118.5 | 199.5 | 244 | 170 | 86 | 22.5 | 26 |
Flood depth (m) | 0 | 0.7 | 1.3 | 1.7 | 1.1 | 0.4 | 0 | 0 |
Around Jinheung Apartment | ||||||||
Time | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 0 | 28 | 42.5 | 45 | 22 | 8.5 | 20 | 18.5 |
Flood depth (m) | 0 | 0 | 0.1 | 0.1 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 | 03:00 |
Accumulated rainfall (mm/3 h) | 40.5 | 118.5 | 199.5 | 244 | 170 | 86 | 22.5 | 26 |
Flood depth (m) | 0 | 0.7 | 1.3 | 1.7 | 1.1 | 0.4 | 0 | 0 |
Around Hadan Station | |||||||
Time | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 1.8 | 2.2 | 10.1 | 21.6 | 24 | 24 | 22.1 |
Flood depth (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 |
Accumulated rainfall (mm/3 h) | 28.4 | 44.2 | 104.1 | 107.8 | 91.7 | 21.4 | 8.1 |
Flood depth (m) | 0 | 0 | 0.3 | 0.3 | 0.2 | 0 | 0 |
Around Gwangbok Street | |||||||
Time | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 1.8 | 2.2 | 10.1 | 21.6 | 24 | 24 | 22.1 |
Flood depth (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 |
Accumulated rainfall (mm/3 h) | 28.4 | 44.2 | 104.1 | 107.8 | 91.7 | 21.4 | 8.1 |
Flood depth (m) | 0 | 0.1 | 0.3 | 0.3 | 0.2 | 0 | 0 |
Around Busanjin-gu Gaya Underpass | |||||||
Time | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
Accumulated rainfall (mm/3 h) | 1.8 | 2.2 | 10.1 | 21.6 | 24 | 24 | 22.1 |
Flood depth (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Time | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 | 02:00 |
Accumulated rainfall (mm/3 h) | 28.4 | 44.2 | 104.1 | 107.8 | 91.7 | 21.4 | 8.1 |
Flood depth (m) | 0 | 0 | 1.1 | 1.2 | 0.9 | 0 | 0 |
Around Ojukheon | |||||||
Time | 23:00 | 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 |
Accumulated rainfall (mm/3 h) | 21 | 30 | 40.5 | 52 | 96 | 124 | 136.5 |
Flood depth (m) | 0 | 0.1 | 0.2 | 0.3 | 0.6 | 0.8 | 0.9 |
Time | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 |
Accumulated rainfall (mm/3 h) | 155 | 136.5 | 118.5 | 47 | 24.5 | 15 | 9.5 |
Flood depth (m) | 1.1 | 0.9 | 0.8 | 0.2 | 0.1 | 0 | 0 |
Around Yeonnam-dong, Mapo-gu | |||||||
Time | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 |
Accumulated rainfall (mm/3 h) | 2 | 11.5 | 15.5 | 14 | 7 | 5.5 | 23.5 |
Flood depth (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 |
Time | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 |
Accumulated rainfall (mm/3 h) | 28 | 41 | 52 | 45.5 | 33.5 | 5 | 5 |
Flood depth (m) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0 | 0 |
Around Sangam-dong, Mapo-gu | |||||||
Time | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 |
Accumulated rainfall (mm/3 h) | 2 | 11.5 | 15.5 | 14 | 7 | 5.5 | 23.5 |
Flood depth (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Time | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 | 00:00 | 01:00 |
Accumulated rainfall (mm/3 h) | 28 | 41 | 52 | 45.5 | 33.5 | 5 | 5 |
Flood depth (m) | 0 | 0.2 | 0.4 | 0.3 | 0.1 | 0 | 0 |
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Kang, D.H.; Nam, D.H.; Song, Y.S.; Kim, B.S. A Proposed Method for Calculating the Rainfall Threshold Based on the Multi-Method to Provide Heavy Rain Disaster Impact Information. Water 2023, 15, 3366. https://doi.org/10.3390/w15193366
Kang DH, Nam DH, Song YS, Kim BS. A Proposed Method for Calculating the Rainfall Threshold Based on the Multi-Method to Provide Heavy Rain Disaster Impact Information. Water. 2023; 15(19):3366. https://doi.org/10.3390/w15193366
Chicago/Turabian StyleKang, Dong Ho, Dong Ho Nam, Young Seok Song, and Byung Sik Kim. 2023. "A Proposed Method for Calculating the Rainfall Threshold Based on the Multi-Method to Provide Heavy Rain Disaster Impact Information" Water 15, no. 19: 3366. https://doi.org/10.3390/w15193366