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Article: Land subsidence caused by groundwater exploitation in Suzhou City, China

TitleLand subsidence caused by groundwater exploitation in Suzhou City, China
Authors
KeywordsFinite difference
Groundwater
Land subsidence
Nonlinear consolidation
Numerical simulation
Issue Date2003
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/10040/index.htm
Citation
Hydrogeology Journal, 2003, v. 11 n. 2, p. 275-287 How to Cite?
AbstractSuzhou City, located at the lower reaches of the Yangtze River in southeastern Jiangsu Province, is one of the few cities in China which suffer from severe ground settlement. A research project was carried out to investigate this problem. Geological and hydrogeological studies show that there is a multi-layered aquifer system with three distinct, soft mud layers of marine and lagoonal origins. An examination of historical records of groundwater extraction, water levels, and ground settlement shows that the ground subsidence is associated with the continuously increasing groundwater extraction in the deep, confined aquifer. It is believed that the consolidation of the soft mud layers, especially the third layer which is thick and close to the main pumped aquifer, contributes to the ground settlement. A three-dimensional finite difference numerical model representing the multi-layered aquifer system was developed to study the ground settlement in response to groundwater extraction. By calibrating the model with both the measured groundwater level and ground settlement, the aquifer parameters were estimated. The model outputs fit reasonably well with the observed results, which indicates that the numerical model can reproduce the dynamic processes of both groundwater flow and soil consolidation. The hydraulic conductivity of the third mud layer near the center of the ground settlement has been reduced by over 30% in the last 14 years. The gradual deterioration in the hydraulic conductivity of the mud may have significant adverse effect on the sustainable groundwater resource of the deep confined aquifer, since the recharge from the shallow aquifers through the mud layer is the only source of water to the deep aquifer. An analysis of the spatial distributions of groundwater drawdown and ground settlement shows that the area with maximum drawdown is not necessarily the area with maximum ground settlement due to the occurrence of the soft mud layer. A simple reallocation in pumping rates on the basis of the spatial distribution of the thick mud layer could significantly reduce the ground settlement.
Persistent Identifierhttp://hdl.handle.net/10722/72458
ISSN
2015 Impact Factor: 2.028
2015 SCImago Journal Rankings: 1.049
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Cen_HK
dc.contributor.authorPei, Sen_HK
dc.contributor.authorJiao, JJen_HK
dc.date.accessioned2010-09-06T06:42:01Z-
dc.date.available2010-09-06T06:42:01Z-
dc.date.issued2003en_HK
dc.identifier.citationHydrogeology Journal, 2003, v. 11 n. 2, p. 275-287en_HK
dc.identifier.issn1431-2174en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72458-
dc.description.abstractSuzhou City, located at the lower reaches of the Yangtze River in southeastern Jiangsu Province, is one of the few cities in China which suffer from severe ground settlement. A research project was carried out to investigate this problem. Geological and hydrogeological studies show that there is a multi-layered aquifer system with three distinct, soft mud layers of marine and lagoonal origins. An examination of historical records of groundwater extraction, water levels, and ground settlement shows that the ground subsidence is associated with the continuously increasing groundwater extraction in the deep, confined aquifer. It is believed that the consolidation of the soft mud layers, especially the third layer which is thick and close to the main pumped aquifer, contributes to the ground settlement. A three-dimensional finite difference numerical model representing the multi-layered aquifer system was developed to study the ground settlement in response to groundwater extraction. By calibrating the model with both the measured groundwater level and ground settlement, the aquifer parameters were estimated. The model outputs fit reasonably well with the observed results, which indicates that the numerical model can reproduce the dynamic processes of both groundwater flow and soil consolidation. The hydraulic conductivity of the third mud layer near the center of the ground settlement has been reduced by over 30% in the last 14 years. The gradual deterioration in the hydraulic conductivity of the mud may have significant adverse effect on the sustainable groundwater resource of the deep confined aquifer, since the recharge from the shallow aquifers through the mud layer is the only source of water to the deep aquifer. An analysis of the spatial distributions of groundwater drawdown and ground settlement shows that the area with maximum drawdown is not necessarily the area with maximum ground settlement due to the occurrence of the soft mud layer. A simple reallocation in pumping rates on the basis of the spatial distribution of the thick mud layer could significantly reduce the ground settlement.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/10040/index.htmen_HK
dc.relation.ispartofHydrogeology Journalen_HK
dc.subjectFinite differenceen_HK
dc.subjectGroundwateren_HK
dc.subjectLand subsidenceen_HK
dc.subjectNonlinear consolidationen_HK
dc.subjectNumerical simulationen_HK
dc.titleLand subsidence caused by groundwater exploitation in Suzhou City, Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1431-2174&volume=v11 &issue=2&spage=p275&epage=287&date=2003&atitle=Land+subsidence+caused+by+groundwater+exploitation+in+Suzhou+City,+Chinaen_HK
dc.identifier.emailJiao, JJ:jjiao@hku.hken_HK
dc.identifier.authorityJiao, JJ=rp00712en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0042848613en_HK
dc.identifier.hkuros81055en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0042848613&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.issue2en_HK
dc.identifier.spage275en_HK
dc.identifier.epage287en_HK
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridChen, C=14027847300en_HK
dc.identifier.scopusauthoridPei, S=7202462983en_HK
dc.identifier.scopusauthoridJiao, JJ=7102382963en_HK

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