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| Titel |
Evaluation of groundwater depletion in North China using the Gravity Recovery and Climate Experiment (GRACE) and ground-based measurements |
| VerfasserIn |
Wei Feng, Min Zhong, Jean-Michel Lemoine, Richard Biancale, Hou-Tse Hsu, Jun Xia |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250073203
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| Zusammenfassung |
| Regional groundwater storage changes in North China are estimated from the Gravity
Recovery and Climate Experiment (GRACE) satellites and ground-based measurements over
2003-2010. The study area includes Beijing, Tianjin municipality, Hebei province and Shanxi
province (~370,000 km2), which is one of the largest irrigation areas in the world and
subjected to intensive groundwater-based irrigation. The groundwater depletion in
North China is estimated by removing the simulated soil moisture changes from the
GRACE-derived terrestrial water storage changes. The rate of groundwater depletion in North
China based on GRACE is 2.2 ± 0.3 cm/yr over 2003-2010, which is equivalent to 8.3 ± 1.1
km3/yr in volume. The groundwater depletion rate estimated from monitoring well stations in
the same time period is in the range of 2.0-2.8 cm/yr, which is consistent with the
GRACE result. However, the estimate of groundwater depletion rate in shallow plain
aquifers from Groundwater Bulletin of China Northern Plains (GBCNP) in the
same time period is only about 2.5 km3/yr. The difference in groundwater depletion
rates between GRACE and GBCNP indicates the important contribution of deep
aquifers’ groundwater depletion in plain and piedmont regions of North China. |
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