Kwanchai Pakoksung

Kwanchai Pakoksung
Tohoku University | Tohokudai · International Research Institute of Disaster Science (IRIDeS)

D. Eng (infrastructure engineering)

About

45
Publications
8,939
Reads
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209
Citations
Additional affiliations
April 2019 - February 2021
Tohoku University
Position
  • PostDoc Position
April 2017 - March 2019
Tohoku University
Position
  • PostDoc Position
October 2016 - March 2017
Kochi University of Technology
Position
  • Professor (Assistant)
Education
October 2013 - September 2016
Kochi University of Technology
Field of study
  • Runoff Analysis using Satellite Data for Regional Flood Assessment - Spatial and Time Series Bias Correction of Satellite Data -
June 2001 - May 2004
Chulalongkorn University
Field of study
  • Hydraulic modelling
June 1997 - March 2001

Publications

Publications (45)
Preprint
Consecutive Mw 7.0 and Mw 6.9 submarine earthquakes occurred offshore Hengchun Peninsula, Taiwan on 26 December 2006. A small tsunami was generated, and recorded at tide gauge stations for the first time. This important event attracted public interest as it was generated by doublet sources and demonstrated tsunami risk in Taiwan. This study analyze...
Article
Studies have indicated that submarine landslides played an important role in the 2018 Sulawesi tsunami event, damaging the coast of Palu Bay in addition to the earthquake source. Most of these studies relied on observed coastal subaerial landslides to reproduce tsunamis but could still not fully explain the observational data. Recently, several num...
Article
The detailed understanding of tsunami hazard risk using numerical simulations requires a numerical model that can accurately predict tsunami inundation phenomena on land. In such models, the structural effects are indirectly considered using the variation of bottom roughness as a proxy for the differences in building densities. Only a few studies h...
Article
Full-text available
Physically based distributed hydrologic modeling, rainfall-runoff-inundation (RRI) model is used to evaluate runoff uncertainty on different topography data using five DEM products such as ASTER GDEM, SRTM, GMTED2010, HydroSHEDS, and GTOPO30. The five DEM products are input to the RRI model for the case study on the Nan River basin (13,000 km2 of t...
Article
Full-text available
Indonesia has experienced several tsunamis triggered by seismic and non-seismic (i.e., landslides) sources. These events damaged or destroyed coastal buildings and infrastructure and caused considerable loss of life. Based on the Global Earthquake Model (GEM) guidelines, this study assesses the empirical tsunami fragility to the buildings inventory...
Preprint
Full-text available
Studies have indicated that submarine landslides played an important role in the 2018 Sulawesi tsunami event, damaging the coast of Palu Bay in addition to the earthquake source. Most of these studies relied on visible landslides to reproduce tsunamis but could still not fully explain the observational data. Recently, several numerical models inclu...
Article
Full-text available
Modern tsunami events have highlighted the vulnerability of port structures to these high-impact but infrequent occurrences. However, port planning rarely includes adaptation measures to address tsunami hazards. The 2011 Tohoku tsunami presented us with an opportunity to characterise the vulnerability of port industries to tsunami impacts. Here, we...
Article
Full-text available
On September 28 2018, an Mw 7.5 strike-slip earthquake occurred to the north of Palu Bay on the Sulawesi Island, Indonesia. This triggered a destructive tsunami within the bay, which reached Palu city. Simulation have been conducted to investigate the landslide source. However, the tsunami should be investigated considering a physical model in the...
Article
Full-text available
Digital Elevation Model (DEM) is the model of Earth’s surface and is significantly variable for science application. The DEMs based on free provided are the 10 m DEM produced by the Geographical Survey Institute of Japan (GSI-DEM), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global DEM, Shuttle Radar Topography Mission (S...
Article
Full-text available
When considering a tsunami disaster, many researchers have considered the tsunami’s flow depth and velocity as the primary contributors to the building damage. Additionally, the majority of these studies have used the maximum value as the measure of each of these two factors. However, building damage may not occur when the maximum flow depth and th...
Article
Full-text available
A probabilistic hazard analysis of a tsunami generated by a subaqueous volcanic explosion was performed for Taal Lake in the Philippines. The Taal volcano at Taal Lake is an active volcano on Luzon Island in the Philippines, and its eruption would potentially generate tsunamis in the lake. This study aimed to analyze a probabilistic tsunami hazard...
Article
Full-text available
Typhoon Hagibis, which occurred at the beginning of October 2019, was one of the largest and most powerful tropical cyclones and was considered to be the most devastating typhoon to hit Japan in recorded history. Extreme heavy rainfall caused massive impacts to Japan in general and to Marumori Town, Miyagi Prefecture in particular. In the present s...
Article
In recent years, the risk of natural disasters is expected to increase due to climate change. However, the impact of sea level rise on tsunami damage and related economic loss is not clear. Therefore, this study made an attempt in evaluating future tsunami damage in Tohoku region as an example. Future earthquake along Japan Trench is selected as ts...
Preprint
Full-text available
Indonesia has experienced several recent tsunamis triggered by seismic as well as non-seismic (i.e., 15 landslides) sources. These events damaged or destroyed coastal buildings and infrastructure, and caused considerable loss of life. The impact of tsunami characteristics on structural components can be represented by fragility curves. These cumula...
Preprint
Full-text available
Modern tsunami events have highlighted the vulnerability of port structures to these high-impact but infrequent occurrences. However, port planning rarely includes adaptation measures to address tsunami hazards. The 2011 Tohoku tsunami presented us with an opportunity to characterise the vulnerability of port industries to tsunami impacts. Here, we...
Article
Full-text available
Following the eruption of Mount Anak Krakatau, a considerable landslide occurred on the southwestern part of the volcano and, upon entering the sea, generated a large tsunami within the Sunda Strait, Indonesia, on December 22, 2018. This tsunami traveled ~ 5 km across the strait basin and inundated the shorelines of Sumatra and Java with a vertical...
Preprint
Full-text available
A probabilistic hazard analysis of a tsunami generated by a subaqueous volcanic explosion is performed for Taal Lake in the Philippines. The Taal volcano in Taal Lake is an active volcano on Luzon Island in the Philippines, and its eruption would have a strong impact on humans around the coastal area of the lake. This study aims to develop a probab...
Preprint
Full-text available
Following the eruption of Anak Krakatoa, aconsiderable landslide occurred on the southwestern part of the volcano and, upon entering the sea, generated a large tsunami within the Sunda Strait, Indonesia, on 22 December 2018. This tsunami traveled ~5 km across the strait basin and inundated the shorelines of Sumatra and Java with a vertical runuprea...
Preprint
Full-text available
Following the eruption of Mount Anak Krakatau, a considerable landslide occurred on the southwestern part of the volcano and, upon entering the sea, generated a large tsunami within the Sunda Strait, Indonesia, on 22 December 2018. This tsunami traveled ~5 km across the strait basin and inundated the shorelines of Sumatra and Java with a vertical r...
Article
Full-text available
We developed tsunami fragility functions using three sources of damage data from the 2018 Sulawesi tsunami at Palu Bay in Indonesia obtained from (i) field survey data (FS), (ii) a visual interpretation of optical satellite images (VI), and (iii) a machine learning and remote sensing approach utilized on multisensor and multitemporal satellite imag...
Article
There have been many studies of tsunami deposits along the west coast of the United States because there are abundant sites with deposites, and because of the need to study understand the risk of future tsunamis. Most of tsunami deposits found along the US’s Pacific coast were probably from tsunamis originating from the Cascadia Subduction Zone (CS...
Article
Typhoon Hagibis that occurred in the beginning of October 2019 was one of a largest and powerful tropical cyclone and was considered to be the most devastating typhoon to hit Japan in recorded history. Extreme heavy rainfall caused massive impacts to Japan in general and to Marumori Town, Miyagi Prefecture in particular. In this study, a detailed f...
Article
Full-text available
Tsunami fragility functions describe the probability of structural damage due to tsunami flow characteristics. Fragility functions developed from past tsunami events (e.g., the 2004 Indian Ocean tsunami) are often applied directly, without modification, to other areas at risk of tsunami for the purpose of damage and loss estimations. Consequentiall...
Article
Full-text available
Understanding the impacts of tsunamis, especially in terms of damage and losses, is important for disaster mitigation and management. The aim of this study is to present our estimations of the potential losses from tsunami damage on Okinawa Island. We combine the use of a tsunami hazard map and our proposed economic loss model to estimate the poten...
Article
Full-text available
The strike-slip earthquake on 28 September 2018 (Mw 7.5) along the Palu-Koro fault on Sulawesi Island has raised concerns about the potential impact of tsunamis generated by submarine landslides in Palu Bay, Indonesia. The horizontal displacement of the Palu-Koro fault generated landslide tsunamis that covered Palu Bay, creating wave-related hazard...
Article
Full-text available
Tsunami fragility functions describe the probability of structural damage to tsunami flow characteristics. Fragility functions developed from past tsunami events (e.g. 2004 Indian Ocean tsunami) are often applied directly, without modifications, to other areas at risk of tsunami for the purpose of damage and loss estimations. Consequentially, estim...
Article
The tsunami of the strike-slip earthquake that occurred on the 2018 Sulawesi Island Earthquake had arrived earlier than estimated from the seismic fault. This tsunami was captured as video images from an airplane and fishing boat immediately after the occurrence. These images were posted via Social Net-working Service (SNS) and became very importan...
Article
We present outcomes of our collaborative research between tsunami engineering laboratory, Tohoku University and the Willis Research Network (WRN) on global tsunami risk assessment since 2010. First we assessed tsunami hazards in Indian Ocean and west Pacific from major earthquakes based on historical records. After the 2011 Japan tsunami, various k...
Article
Full-text available
Regional disaster data are important for understanding the characteristics of disasters and for identifying potential mitigation measures. However, many countries have no official disaster database that includes information such as numbers of deaths or damaged buildings for each disaster event. The Global Centre for Disaster Statistics (GCDS) was e...
Conference Paper
Full-text available
Recently, there are numerous disaster events around Asia, starting from Fukushima incident, in Japan, Indonesia earthquake, Bangkok Floods 2011 etc. Besides, the changing climate also induced the unsafe environment to the existing way of infrastructures whether they can still preserve human safety level as it should be or not. The study of climate...
Article
Full-text available
The aim of this study is to assess the performances of different infrastructures as structural tsunami countermeasures in Sendai City, based on the lessons from the 11 March 2011, Great East Japan Tsunami, which is an example of a worst-case scenario. The tsunami source model Ver. 1.2 proposed by Tohoku University uses 10 subfaults, determined base...
Article
Full-text available
Macro scale assessment of building damage by tsunami can be performed using two classical methods namely, fragility functions and weight factors based on their vulnerability. However, these methods do not consider the actual performance nor strength of the buildings and damage might occur before either of flow depth and flow velocity reach maximum...
Article
Full-text available
In hydrological processes, rainfall is one of the important components of water supply for human life. We considered how well the statistical distribution simulates rainfall intensity. We propose an asymmetric statistical probability distribution joined by zero-inflated to fit the daily continuous record of rainfall data in Thailand. The candidate...
Conference Paper
Full-text available
KEY WORDS: MODIS, Land cover, Land cover change, Hydrological model, Impact of land cover change ABSTRACT: Flooding causes significant damage when heavy rainfall occurs. Flood modeling is firstly established for studying the flood characteristic before design of flood mitigation management. The size of flood disaster depends on topography, land cov...
Article
Full-text available
Physically-based distributed hydrological modelling, Rainfall-Runoff-Inundation (RRI) model is used to evaluate runoff accuracy by using six satellite based rainfall products such as GPM, GSMaP, TRMM 3B42V7, CMORPH, and PERSIANN. These products input to drive the model on the Nan River basin, Thailand that is the watershed of 13,000 km2. The perfor...
Article
Full-text available
Digital Elevation Model (DEM) is used to represent the terrain of the earth. A free provided DEMs are the 10 m DEM produced by the Geographical Survey Institute of Japan (GSI-DEM), Advanced Space Borne Thermal Emission and Reflection Radiometer-Global DEM, Shuttle Radar Topography Mission, Global Multi-resolution Terrain Elevation Data 2010, Hydrol...
Conference Paper
Digital Elevation Models (DEMs) on free provided data including Shuttle Radar Topography Mission (SRTM) and Advanced Space borne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM) are used to model nearly the surface of earth. DEMs have made a high accuracy to assess an error using an observation elevation point....
Conference Paper
Floods are one of all the major natural disasters, affecting in fatalities in the short-term and financial burden in the long-term. For understanding the floods damage cost based on inundation area is an important element of flood management work. This study was focused on spatial and losses of flood damage in Thailand, using remote sensing techniq...
Conference Paper
Full-text available
Land use change and deforestation are the important factor to determine the runoff from the watershed. The change also affect to runoff volume and may cause flood and drought situations. The change in runoff volume due to the land use change can be considered from runoff ratio coefficient which can be determined by comparing the measured accumulate...
Article
Full-text available
Thailand was hit by a great flood in 2011 resulting from irregular rainfall during the typhoon season that was estimated at 140% more than average. The flood began in the north and slowly moved to the central region, where it remained for more than 4 months. The flood caused great damage to the economy because it adversely affected industrial estat...
Conference Paper
Full-text available
Flood always causes significantly economic damage. Flood protection using the structural measures can be caused difficulties with the people and also budgets. On the other hand if the location, time, and quantities of the precipitation can be predicted, the flood awareness and preparation are efficiently used to minimize damages from the disaster....
Article
Full-text available
Forest area in Nan river Basin was deteriorated due to the increased deforestation for agricultural purpose, resulting in natural resources change especially water flow in natural streams. Having been grown in the economic in NAN basin, the agricultural area had been increased. In the contrary, while the agricultural area increased, the forest area...

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