Land Subsidence

Marker, Brian R.

doi:10.1007/978-1-4020-4399-4_208

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…A type of land subsidence, where there is relatively slow, moderate downward vertical displacement of the Earth's surface (as opposed to collapse, which is sudden or catastrophic in nature). This is due to the underground instability, a load superimposed on the surface, or both, due to natural processes or anthropogenic activities leading to instability in the natural environment (Marker, 2013).…”

Section: Settlement G Ltmentioning

confidence: 99%

Review article: Insuring the green economy against natural hazards – charting research frontiers in vulnerability assessment

Baskaran,

Ioannou,

Rossetto

et al. 2024

Preprint

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Abstract. The insurance of green economy assets against natural hazards is a growing market. This study explores whether currently available published knowledge is adequate for the vulnerability assessment of these assets to natural hazards. A matrix is constructed to demonstrate the vulnerability to functional loss of 37 asset classes in the renewable energy, green construction, resource management, carbon capture and storage, energy storage and sustainable transportation sectors. The 28 hazards adopted range from environmental and geophysical events to oceanic, coastal, and space weather events. A fundamental challenge in constructing the matrix was the lack of an asset-hazard taxonomy for the green economy. Each matrix cell represents the vulnerability of an asset to a specific hazard, based on a comprehensive systematic literature review. A confidence level is assigned to each vulnerability assessment based on a literature density heat map. The latter highlights specific knowledge gaps, and in particular a lack of quantitative vulnerability studies that appropriately represent all functional loss mechanisms in green economy assets. Apart from charting research gaps, a main output of this study is the proposal of a representative asset-hazard taxonomy to guide future, quantitative research that can be applied by the insurance industry.

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Section: Settlement G Ltmentioning

confidence: 99%

Review article: Insuring the green economy against natural hazards – charting research frontiers in vulnerability assessment

Baskaran,

Ioannou,

Rossetto

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Land subsidence is a vertical shift to the surface of the earth due to lack of carrying capacity of the land, excessive load or a combination of both caused by natural or manmade [9]. The causes of land subsidence can occur both locally and regionally, several factors including natural factors, liquid material extraction factors in the soil and heavy load factors on the ground [10].…”

Section: Land Subsidence In Semarang Citymentioning

confidence: 99%

Integration PS-InSAR and MODIS PWV Data to Monitor Land Subsidence in Semarang City 2015–2018

Azeriansyah

Harintaka

2019

KEG

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Land Subsidence is a slow on set disaster that can be found in coastal areas such as Semarang City. The cause is changing natural conditions and human activities. The observation method that is often done for this phenomenon is GNSS observation. The GNSS observations do not cover the entire area are the disadvantages of this method. Solution that can be used is to use a multi-temporal Interferometric Synthetic Aperture Radar (InSAR) method called Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR). In its application, PS-InSAR has a problem in the form of tropospheric errors that cause signal interference on SAR sensors when making acquisitions that contained in every Synthetic Aperture Radar (SAR) image. MODIS with the NIR band provide Precipitable Water Vapor (PWV) to estimate water vapor levels in the atmosphere. This component can be used in the PS-InSAR in order to eliminate the tropospheric effect on each image so that errors can be minimized and optimize the work of the PS-InSAR method. Based on the value of PS-InSAR before and after tropospheric correction, it is known that the area of Semarang City experienced a rate of land subsidence and the rate of uplift. Land subsidence rate occurs along the northern region, northeast to the east of Semarang City. Uplift rate only occurs in the southeast region due to dumping excavation activities for development and Banjir Kanal Barat due to the river revitalization process. Overall, Semarang City has experienced a land subsidence from 0 to 6.753 cm/year.

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“…Land subsidence is "the mainly vertical downward displacement of the Earth's surface generally due to insufficient support from beneath, a superimposed load, or a combination of both" (Marker 2013) and is an urgent issue relative to residential safety of a delta. From an absolute perspective of vertical downward displacement, land subsidence includes four major types: (1) resulting from underground cavities that are made by natural or man-made processes; (2) caused by an earthquake; (3) caused by the extraction of groundwater or mining from the ground; or (4) caused by a superimposed load on soft substratum (Marker 2013). From a relative perspective of vertical displacement to sea level, the condition of sinking deltas can be illustrated as Δ RSL , the vertical change of ground surface relative to local sea level, which is determined by five factors (Syvitski et al 2009):…”

Section: Land Subsidence As a Common Problem In Deltasmentioning

confidence: 99%

The exploration of relationship between land subsidence and landscape transformation

Chung

2019

Nat Hazards

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Maintenance of groundwater level is an important issue toward resolving land subsidence problems in delta regions; this process includes two major mechanisms: recharge and discharge. However, the overuse of groundwater in coastal aquaculture or agriculture, from the perspective of discharge, is still viewed as the major issue which causes the problem of land subsidence in many Asian countries. This article focused on the significant decrease in infiltration in history, from the perspective of recharge, to explore land subsidence. Through the three-by-three layer approach, we demonstrated that decisive intervention by man-made landscapes, including dike construction, river reclamation, and establishment of built areas, which can date back to the Japanese colonization about 100 years ago, has significantly changed waterways in Taiwan. This intervention induced a tremendous reduction in groundwater infiltration and subsequently has a close relationship with the serious land subsidence that is occurring in the southwestern coastal regions. The abuse of groundwater by fishermen for aquaculture in recent decades might just be the last factor in a series of events to cause a sinking land. This paper argues that a certain ratio of land should be restored for the purpose of groundwater recharge to amend the effect of the man-made intervention on the natural water system. In addition, in accordance with the sedimentation features of deltas, areas located at the top of the alluvial fan of a delta, which have porous soil structures, bear greater responsibility for infiltration.

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Land Subsidence

Cited by 8 publications

References 29 publications

Review article: Insuring the green economy against natural hazards – charting research frontiers in vulnerability assessment

Review article: Insuring the green economy against natural hazards – charting research frontiers in vulnerability assessment

Integration PS-InSAR and MODIS PWV Data to Monitor Land Subsidence in Semarang City 2015–2018

The exploration of relationship between land subsidence and landscape transformation

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