Observational Method for More Reliable Settlement Prediction for Reclamation on the Holocene Marine Clay Deposit in Jakarta Bay

Tirta, Budiwan Adi; Nugroho, M. Adecar; Parahita, Bonifacius; Focks, Dirk-Jan Jaspers

doi:10.1051/matecconf/201814707007

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…To address this knowledge gap, it is important to understand the effect of groundwater salinity to the compressive characteristics of marine clay. The marine clay of North Java coastal plain is generally soft and highly compressible [35][36][37], hence prone to subside. The high rate of land subsidence in the coastal cities of North Java raises the question of whether the groundwater quality affects the compressibility characteristics of the aquitard.…”

Section: Introductionmentioning

confidence: 99%

A physical study of the effect of groundwater salinity on the compressibility of the Semarang-Demak aquitard, Java Island

Sarah¹,

Hutasoit²,

Delinom³

et al. 2018

Preprint

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This article is currently under review oin Journal of Geosciences, MDPI. Authors: Dwi Sarah, Lambok Hutasoit, Robert Delinom, Imam A. Sadisun, Taufiq Wirabuana -- Semarang-Demak and other cities along the coast of North Java are vulnerable to land subsidence. The presence of saline groundwater in the coastal region is thought to affect the high subsidence rate, in this case the compressibility of the aquitard layer. We aimed to analyze the effects of groundwater salinity on the compression characteristics of the Semarang-Demak clay using physical analysis. Methods included the determination of groundwater salinity, clay mineralogy and fabrics, and consolidation tests under various salinity conditions. The Semarang-Demak clay is dominated by smectite of high activity and saline clay exists at the depth of 10 to 35 m. Consolidation tests reveals that the increase of salinity increases the average consolidation rate and hydraulic conductivity up to 42% and 37.5%, respectively. Clay fabric analysis showed that the groundwater salinity modified the interconnectivity of pores by changing the fabric into parallel alignments, facilitating faster porewater dissipation, hence the clay is more readily compressed. These findings are useful for explaining the mechanism of the fast-subsiding coastal plains of North Java.

show abstract

Section: Introductionmentioning

confidence: 99%

A physical study of the effect of groundwater salinity on the compressibility of the Semarang-Demak aquitard, Java Island

Sarah¹,

Hutasoit²,

Delinom³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…To address this knowledge gap, it is important to understand the effect of groundwater salinity on the compressive characteristics of marine clay. The marine clay of the North Java coastal plain is generally soft and highly compressible [35][36][37] and hence prone to subside. The high rate of land subsidence in the coastal cities of North Java raises the question of whether the groundwater quality affects the compressibility characteristics of the aquitard.…”

Section: Introductionmentioning

confidence: 99%

A Physical Study of the Effect of Groundwater Salinity on the Compressibility of the Semarang-DemakAquitard, Java Island

et al. 2018

View full text Add to dashboard Cite

Semarang-Demak and other cities along the coast of North Java are vulnerable to land subsidence. The presence of saline groundwater in the coastal region is thought to affect the high subsidence rate, in this case the compressibility of the aquitard layer. We aimed to analyze the effects of groundwater salinity on the compression characteristics of the Semarang-Demak clay using physical analysis. Methods included the determination of groundwater salinity, clay mineralogy and fabrics, and consolidation tests under various salinity conditions. The Semarang-Demak clay is dominated by smectite of high activity, and saline clay exists at the depth of 10 to 35 m. Consolidation tests revealed that the increase insalinity increases the average consolidation rate and hydraulic conductivity up to 42% and 37.5%, respectively. Clay fabric analysis showed that the groundwater salinity modified the interconnectivity of pores by changing the fabric into parallel alignments, facilitating faster porewater dissipation, hence the clay is more readily compressed. These findings are useful for explaining the mechanism of the fast-subsiding coastal plains of North Java.

show abstract

Observational Method for More Reliable Settlement Prediction for Reclamation on the Holocene Marine Clay Deposit in Jakarta Bay

Cited by 2 publications

References 3 publications

A physical study of the effect of groundwater salinity on the compressibility of the Semarang-Demak aquitard, Java Island

A physical study of the effect of groundwater salinity on the compressibility of the Semarang-Demak aquitard, Java Island

A Physical Study of the Effect of Groundwater Salinity on the Compressibility of the Semarang-DemakAquitard, Java Island

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