Changes in late Pleistocene–Holocene sedimentary facies of the Mekong River Delta and the influence of sedimentary environment on geotechnical engineering properties

Truong, Mandy; Nguyen, Van Lap; Ta, Thi Kim Oanh; Takemura, Jiro

doi:10.1016/j.enggeo.2011.05.012

Cited by 26 publications

(29 citation statements)

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“…The illilte contents of the CLM1 core are larger than those of the VLM1 core (Truong et al, 2011) but the smectite contents of the VLM1 core are larger than. The illite content of the natural levee facies association is the largest in comparison with the others (Table 3a).…”

Section: Discussionmentioning

confidence: 92%

“…The geological columns, soil-behavior types by the Q t -F R relationship, and values of q t , f s , u 2 , Q t , F R , and B q , and N by the SPT on the each sedimentary facies association at the investigative sites and the VLM1 site (Truong et al, 2011) are presented in Fig. 4, Fig.…”

Section: Resultsmentioning

confidence: 99%

“…12. The I vo are also compared with the data of the Vinhlong (Truong et al, 2011) and Cantho and Tanan cohesive soils (Takemura et al, 2007).

I_{v o} = \frac{e_{0} - e_{100}^{*}}{e_{100}^{*} - e_{1000}^{*}}

The OCR in cohesive soils was estimated from the CPTU results at the sites by the simple formula (5) with k values in a range of 0.2 to 0.5 (Lunne et al, 1997).…”

Section: Resultsmentioning

confidence: 99%

“…The results of sedimentary geology at the BT1, BT2, and BT3 core sites in Bentre province, MRD of Ta et al, 2001; Ta et al, 2002a; Ta et al, 2005 were used. And the results of the geotechnical engineering and sedimentary geology at the VLM1 core site in Vinhlong province, MRD of Truong et al (2011) were also used. A list of the site information including boreholes and in situ tests is shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The sedimentary facies associations sometimes display two somewhat different parts but they still carry the facies association’s main characteristics. However, these differences significantly influence the geotechnical properties (Truong et al, 2011). The MRD Holocene delta evolution and depositional model (Ta et al, 2005) includes (1) The tide-dominated delta in the upper delta plain (Fig.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The influence of delta formation mechanism on geotechnical property sequence of the late Pleistocene–Holocene sediments in the Mekong River Delta

Hoang

Lap

Oanh

et al. 2016

Heliyon

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The aim of the study was to characterize a variety of microstructure development-levels and geotechnical property sequences of the late Pleistocene–Holocene deposits in the Mekong River delta (MRD), and the paper furthermore discusses the influences of delta formation mechanisms on them. The survey associated the geotechnical engineering and the sedimentary geology of the late Pleistocene–Holocene deposits at five sites and also undifferentiated Pleistocene sediments. A cross-section which was rebuilt in the delta progradation-direction and between the Mekong and Bassac rivers represents the stratigraphy. Each sedimentary unit was formed under a different delta formation mechanism and revealed a typical geotechnical property sequence. The mechanical behaviors of the sediment succession in the tide-dominated delta with significant fluvial-activity and material source tend to be more cohesionless soils and strengths than those in the tide- and wave-dominated delta and even the coast. The particular tendency of the mechanical behavior of the deposit succession can be reasonably estimated from the delta formation mechanism. The characteristics of the clay minerals from the Mekong River produced the argillaceous soil which does not have extremely high plasticity. The microstructure development-levels are low to very high indicating how to choose hydraulic conductivity value, k, for estimating overconsolidation ratio, OCR, by the piezocone penetration tests (CPTU). The OCR of sediments in the delta types strangely change with depth but none less than 1. The post-depositional processes significantly influenced the microstructure development, particularly the dehydrating and oxidizing processes.

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Section: Discussionmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

“…12. The I vo are also compared with the data of the Vinhlong (Truong et al, 2011) and Cantho and Tanan cohesive soils (Takemura et al, 2007).

I_{v o} = \frac{e_{0} - e_{100}^{*}}{e_{100}^{*} - e_{1000}^{*}}

The OCR in cohesive soils was estimated from the CPTU results at the sites by the simple formula (5) with k values in a range of 0.2 to 0.5 (Lunne et al, 1997).…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The influence of delta formation mechanism on geotechnical property sequence of the late Pleistocene–Holocene sediments in the Mekong River Delta

Hoang

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Oanh

et al. 2016

Heliyon

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show abstract

Depositional environment and geotechnical properties of Shanghai clay: a comparison with Ariake and Bangkok clays

Zhang

et al. 2014

Bull Eng Geol Environ

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Hydrogeochemical characteristics of a multi-layered coastal aquifer system in the Mekong Delta, Vietnam

Tran

Tsujimura

et al. 2019

Environ Geochem Health

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Groundwater is a primary freshwater source for various domestic, industrial and agricultural purposes, especially in coastal regions where there are lacking surface water supply. However, groundwater quality in coastal regions is often threatened by seawater intrusion and contamination due to both anthropogenic activities and natural processes. Therefore, insights into groundwater geochemistry and occurrences are necessary for sustainable groundwater management in coastal regions. The main aim of this study is to investigate the hydrogeochemical characteristics and their influencing factors in a coastal area of the Mekong Delta, Vietnam (MD). A total of 286 groundwater samples were taken from shallow and deep aquifers for analyzing major ions and stable isotopes. The results show that deep groundwater is dominated by Ca-HCO 3 , Ca-Na-HCO 3 , Ca-Mg-Cl, and Na-HCO 3 while shallow groundwater is dominated by the Na-Cl water type. In this region, the main geochemical processes controlling groundwater chemistry are ion exchanges, mineralization and evaporation. Groundwater salinization in coastal aquifers of the Mekong Delta is caused by (1) paleoseawater intrusion and evaporation occurring in the Holocene and Pleistocene aquifers, (2) dissolution of salt sediment/rock and leakage of saline from upper to lower aquifers due to excessive groundwater exploitation and hydraulic connection. High nitrate concentrations in both shallow and deep aquifers are related to human activities. These results imply that groundwater extraction may exacerbate groundwater qualityrelated problems and suitable solutions for sustainable Electronic supplementary material The online version of this article (

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Changes in late Pleistocene–Holocene sedimentary facies of the Mekong River Delta and the influence of sedimentary environment on geotechnical engineering properties

Cited by 26 publications

References 10 publications

The influence of delta formation mechanism on geotechnical property sequence of the late Pleistocene–Holocene sediments in the Mekong River Delta

The influence of delta formation mechanism on geotechnical property sequence of the late Pleistocene–Holocene sediments in the Mekong River Delta

Depositional environment and geotechnical properties of Shanghai clay: a comparison with Ariake and Bangkok clays

Hydrogeochemical characteristics of a multi-layered coastal aquifer system in the Mekong Delta, Vietnam

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