Journal
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Volume 15, Issue 4, Pages 965-974Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013GC005154
Keywords
natural surface rebound; groundwater recovery; persistent scatterer interferometry; aquifer characterization
Categories
Funding
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER)
- World Premier International Research Center Initiative (WPI), MEXT, Japan
- Grants-in-Aid for Scientific Research [13J05029, 21107002] Funding Source: KAKEN
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available