InSAR time-series analysis of land subsidence in Bangkok, Thailand

Aobpaet, Anuphao; Cuenca, Miguel Caro; Hooper, Andrew; Trisirisatayawong, Itthi

doi:10.1080/01431161.2012.756596

Cited by 96 publications

(52 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Estimated additional mean cumulative subsidence until 2025 (mm) are linear interpolations of the current rates, notwithstanding any policy changes. Sources: Bangkok: MoNRE-DGR (2012), Aobpaet et al (2013); Ho Chi Min City: van Trung and Minh Dinh (2009); Jakarta: Bakr (2011); Manila: Eco et al (2011);West Netherlands: van de Ven (1993); Tokyo: Kaneko and Toyota (2011 Figure 2 and Table 1 show that land subsidence rates widely vary from city to city. In many cases, the underlying processes and the relative contribution of the different drivers is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Sinking coastal cities

et al. 2015

View full text Add to dashboard Cite

Abstract. In many coastal and delta cities land subsidence now exceeds absolute sea level rise up to a factor of ten. A major cause for severe land subsidence is excessive groundwater extraction related to rapid urbanization and population growth. Without action, parts of Jakarta, Ho Chi Minh City, Bangkok and numerous other coastal cities will sink below sea level. Land subsidence increases flood vulnerability (frequency, inundation depth and duration of floods), with floods causing major economic damage and loss of lives. In addition, differential land movement causes significant economic losses in the form of structural damage and high maintenance costs for (infra)structure. The total damage worldwide is estimated at billions of dollars annually.As subsidence is often spatially variable and can be caused by multiple processes, an assessment of subsidence in delta cities needs to answer questions such as: what are the main causes? What is the current subsidence rate and what are future scenarios (and interaction with other major environmental issues)? Where are the vulnerable areas? What are the impacts and risks? How can adverse impacts be mitigated or compensated for? Who is involved and responsible to act?In this study a quick-assessment of subsidence is performed on the following mega-cities: Jakarta, Ho Chi Minh City, Dhaka, New Orleans and Bangkok. Results of these case studies will be presented and compared, and a (generic) approach how to deal with subsidence in current and future subsidence-prone areas is provided.

show abstract

Section: Introductionmentioning

confidence: 99%

Sinking coastal cities

et al. 2015

View full text Add to dashboard Cite

show abstract

“…This technique is known as Interferometric SAR, or InSAR, has been widely used for the detection of cm to mm scale deformation, including deformation due to groundwater abstraction (Chaussard et al, 2014;Erban et al, 2014;Bawden et al, 2001;Amelung et al 1999;Aobpaet et al, 2013). Comparison of deformation rates by InSAR techniques generally compare well with deformation rates obtained by traditional surveying techniques including levelling (Aobpaet et al, 2013;Amelung et al 1999) and GPS surveys (Abidin et al, 2009). In general, measurements of surface deformation can have a precision of 2 -5% of the SAR wavelength which typically ranges from 3 cm to 30 cm which implies millimetre to centimetre precision in surface displacement between two satellite passes.…”

Section: Dinsar Datamentioning

confidence: 64%

The management of scarce water resources using GNSS, InSAR and in-situ micro gravity measurements as monitoring tools

Wonnacott¹,

Hartnady²,

Engelbrecht³

2015

SA J of Geomatics

View full text Add to dashboard Cite

BackgroundSouth Africa is mostly a semi-arid, water-stressed country, with an average precipitation of about 450 mm/yr, well below the world average of about 860 mm/yr. Traditionally river water and surface water run-off has been stored in strategically placed large storage dams built in catchment areas. The supply of surface water either from rivers or runoff has been vulnerable to short and long term climate fluctuations with reduced water supplies being affected by drought (Hartnady et al., 2014). The desalination of sea water could be seen as an alternative source of water to supplement Municipal water supply but the process is expensive primarily because of the high cost of energy required to pump sea water or other saline water through membranes in a process known as reverse osmosis. Desalination plants using reverse osmosis have been installed in coastal towns such as Mossel Bay, Knysna and Plettenberg Bay (Mallory et al., 2012) A high percentage of the Earth's fresh water is stored underground which can be extracted either through pumping or using artesian pressure through wells. In semi-arid areas such as the Klein Karoo in the Western Cape, aquifers may not recharge at a sufficiently sustainable rate relative to the rate of withdrawal, especially during periods of drought. In situations such as these, the extraction of water is therefore considered as "mining" of a non-renewable resource which has to be carefully managed (Hartnady et al., 2014). The Blossoms Well FieldConsidering the above and contemporary concern about global warming and its effects on water and food security, the Oudtshoorn Municipality in the Klein Karoo has embarked upon the exploration of a deep artesian aquifer situated approximately 30 km south of the town in the Northern foothills of the Outeniqua mountain range. In addition, the Municipality is developing what is known as the Blossoms Well Field of boreholes of between 500 m and 600 m deep within the area of the aquifer to supplement the current water supply for both the town and the surrounding rural areas. The aquifer is fed by water infiltrating primarily from the southern slopes of the Outeniqua range (see Figure 2). The area of the well field is shown in Figure 1 together with boreholes used in this project. A simplified profile AB of the geology extending from the Outeniqua range to the Blossoms wellfield in the vicinity of C1B3 and C1G1 is shown in Figure 2.

show abstract

“…In contrast, the ground subsided about 1 cm during the 3 years in the northeastern part of the analyzed area, where an industrial complex is located (D). Aobpaet et al [2013] conducted a PSI analysis of RADARSAT-1 data for Bangkok acquired between 2005 and 2010 and reported that most of the area was subsiding. However, Giao [2010] reported that the groundwater levels in the three main pumped aquifers (i.e., the second, third, and fourth shallowest aquifers) recovered from 1997 to 2009 which can well explain the surface rebound found by PSI analysis results of the present study.…”

Section: Spatiotemporal Pattern Of the Surface Reboundmentioning

confidence: 99%

Natural surface rebound of the Bangkok plain and aquifer characterization by persistent scatterer interferometry

Ishitsuka

Fukushima

Tsuji

et al. 2014

Geochem. Geophys. Geosyst.

View full text Add to dashboard Cite

We estimated recent surface displacements around Bangkok by means of persistent scatterer interferometry with ALOS/PALSAR images acquired from November 2007 to December 2010. Land subsidence due to excessive groundwater pumping has been reported in this region. However, we detected ground surface uplift around the mega-city, along with seasonal surface displacement, with high spatial resolution. We then discriminated long-term natural rebound and seasonal displacement by fitting exponential and sinusoidal functions to displacement time-series, and mapped their spatial distributions. This mapping allowed us to infer that the second and third shallowest aquifers are laterally continuous, whereas the shallowest aquifer has lateral discontinuities. The temporal decay rate of the long-term rebound might reflect spatial changes of the Chao Phraya River watershed or the magnitude of the preceding groundwater extraction. We demonstrated that our method of decomposing the displacement time series into different spatial and temporal patterns is useful for understanding aquifer connectivity and the elastic response pattern in an aquifer system.

show abstract

InSAR time-series analysis of land subsidence in Bangkok, Thailand

Cited by 96 publications

References 14 publications

Sinking coastal cities

Sinking coastal cities

The management of scarce water resources using GNSS, InSAR and in-situ micro gravity measurements as monitoring tools

Natural surface rebound of the Bangkok plain and aquifer characterization by persistent scatterer interferometry

Contact Info

Product

Resources

About