Riverbank stability assessment under flooding conditions in the Red River of Hanoi, Vietnam

Thi Toan Duong; Hideo Komine; Minh Duc Do; Satoshi Murakami

doi:10.1016/j.compgeo.2014.05.016

Riverbank stability assessment under flooding conditions in the Red River of Hanoi, Vietnam

Thi Toan Duong^*, Hideo Komine, Minh Duc Do, Satoshi Murakami

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The literature contains limited information on variations in the factors of safety (FOS) of riverbank stability associated with river water level (RWL) fluctuations. This paper analyses a case study on the portion of the Red River flowing through Hanoi using the finite element method and extending the mechanics of saturated and unsaturated soils to understand how the riverbank's FOS varies with RWL fluctuations. The results show that hydrostatic force is one of the key parameters influencing the FOS when the soil's hydraulic conductivity is less than 10^-6m/s. However, the pore-water pressure and rate of RWL change are the key parameters influencing the FOS when the hydraulic conductivity is greater than 10^-6m/s. The study also indicates that a surcharge of 50kPa or higher significantly weakens the riverbank stability and influences the FOS when the RWL rises. The construction of residential or other structures without taking special protection measures within 50m of the lateral riverbank should be avoided for safety reasons.

Original language	English
Pages (from-to)	178-189
Number of pages	12
Journal	Computers and Geotechnics
Volume	61
DOIs	https://doi.org/10.1016/j.compgeo.2014.05.016
Publication status	Published - 2014 Sept
Externally published	Yes

Keywords

Hydraulic conductivity
Loading surcharge
River water level change
Riverbank stability

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

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10.1016/j.compgeo.2014.05.016

Cite this

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title = "Riverbank stability assessment under flooding conditions in the Red River of Hanoi, Vietnam",

abstract = "The literature contains limited information on variations in the factors of safety (FOS) of riverbank stability associated with river water level (RWL) fluctuations. This paper analyses a case study on the portion of the Red River flowing through Hanoi using the finite element method and extending the mechanics of saturated and unsaturated soils to understand how the riverbank's FOS varies with RWL fluctuations. The results show that hydrostatic force is one of the key parameters influencing the FOS when the soil's hydraulic conductivity is less than 10-6m/s. However, the pore-water pressure and rate of RWL change are the key parameters influencing the FOS when the hydraulic conductivity is greater than 10-6m/s. The study also indicates that a surcharge of 50kPa or higher significantly weakens the riverbank stability and influences the FOS when the RWL rises. The construction of residential or other structures without taking special protection measures within 50m of the lateral riverbank should be avoided for safety reasons.",

keywords = "Hydraulic conductivity, Loading surcharge, River water level change, Riverbank stability",

author = "Duong, {Thi Toan} and Hideo Komine and Do, {Minh Duc} and Satoshi Murakami",

note = "Funding Information: The authors appreciate our mentors Prof. Nobuo Mimura and Prof. Kazuya Yasuhara, who have greatly contributed to our academic improvement. The first author also expresses sincere thanks to the 322 Project Scholarship for supporting his PhD studies. This research was partly supported by the Environment Research and Technology Development Fund (S-8) of the Ministry of Environment , Japan ( FY2010-FY2014 , refer to Fig. A1) and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology ( FY2011–FY2013 , refer to Fig. A2). The third author would like to express appreciation for the support provided by the project sponsored by Vietnam National University, Hanoi coded QGT{\D}.12.06 . We also express our sincere gratitude to all the participants in these projects.",

year = "2014",

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doi = "10.1016/j.compgeo.2014.05.016",

language = "English",

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TY - JOUR

T1 - Riverbank stability assessment under flooding conditions in the Red River of Hanoi, Vietnam

AU - Duong, Thi Toan

AU - Komine, Hideo

AU - Do, Minh Duc

AU - Murakami, Satoshi

N1 - Funding Information: The authors appreciate our mentors Prof. Nobuo Mimura and Prof. Kazuya Yasuhara, who have greatly contributed to our academic improvement. The first author also expresses sincere thanks to the 322 Project Scholarship for supporting his PhD studies. This research was partly supported by the Environment Research and Technology Development Fund (S-8) of the Ministry of Environment , Japan ( FY2010-FY2014 , refer to Fig. A1) and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology ( FY2011–FY2013 , refer to Fig. A2). The third author would like to express appreciation for the support provided by the project sponsored by Vietnam National University, Hanoi coded QGTĐ.12.06 . We also express our sincere gratitude to all the participants in these projects.

PY - 2014/9

Y1 - 2014/9

N2 - The literature contains limited information on variations in the factors of safety (FOS) of riverbank stability associated with river water level (RWL) fluctuations. This paper analyses a case study on the portion of the Red River flowing through Hanoi using the finite element method and extending the mechanics of saturated and unsaturated soils to understand how the riverbank's FOS varies with RWL fluctuations. The results show that hydrostatic force is one of the key parameters influencing the FOS when the soil's hydraulic conductivity is less than 10-6m/s. However, the pore-water pressure and rate of RWL change are the key parameters influencing the FOS when the hydraulic conductivity is greater than 10-6m/s. The study also indicates that a surcharge of 50kPa or higher significantly weakens the riverbank stability and influences the FOS when the RWL rises. The construction of residential or other structures without taking special protection measures within 50m of the lateral riverbank should be avoided for safety reasons.

AB - The literature contains limited information on variations in the factors of safety (FOS) of riverbank stability associated with river water level (RWL) fluctuations. This paper analyses a case study on the portion of the Red River flowing through Hanoi using the finite element method and extending the mechanics of saturated and unsaturated soils to understand how the riverbank's FOS varies with RWL fluctuations. The results show that hydrostatic force is one of the key parameters influencing the FOS when the soil's hydraulic conductivity is less than 10-6m/s. However, the pore-water pressure and rate of RWL change are the key parameters influencing the FOS when the hydraulic conductivity is greater than 10-6m/s. The study also indicates that a surcharge of 50kPa or higher significantly weakens the riverbank stability and influences the FOS when the RWL rises. The construction of residential or other structures without taking special protection measures within 50m of the lateral riverbank should be avoided for safety reasons.

KW - Hydraulic conductivity

KW - Loading surcharge

KW - River water level change

KW - Riverbank stability

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Riverbank stability assessment under flooding conditions in the Red River of Hanoi, Vietnam

Abstract

Keywords

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