Deformation of the aquifer system under groundwater level fluctuations and its implication for land subsidence control in the Tianjin coastal region
文献类型：期刊论文
| 作者 | Yang, Jilong2,3; Cao, Guoliang4; Han, Dongmei1,5; Yuan, Haifan2,3; Hu, Yunzhuang2,3; Shi, Peixin2,3; Chen, Yongsheng2,3 |
| 刊名 | ENVIRONMENTAL MONITORING AND ASSESSMENT
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 191期号:3页码:14 |
| 关键词 | Tianjin coastal region Clayey soil Elastic inelastic deformation Land subsidence |
| ISSN号 | 0167-6369 |
| DOI | 10.1007/s10661-019-7296-4 |
| 通讯作者 | Han, Dongmei(handm@igsnrr.ac.cn) |
| 英文摘要 | This study demonstrates characteristics and mechanisms of deformation of an aquifer system in response to seasonal fluctuations of groundwater level when groundwater pumping has been strictly regulated after experiencing longtime land subsidence. Two boreholes with depth of 1226m (G2 site) and 905m (G3 site) were drilled at the Tianjin coastal region where severe land subsidence had occurred since the 1950s. Extensometer/piezometer groups installed at the G2 site illustrate synchronized variations of compaction and groundwater level since 2010 in the aquifer system between depth of 100-400m which contributes most groundwater pumpage. Monitored land subsidence demonstrates that the shallow aquifer has become the main contributor to the land subsidence, and inelastic compaction still occurred in the aquifers where groundwater level has recovered. Pre-consolidation stresses show that clayey soils in depth <100m are under-consolidated, and deep clayey soils show the state of normal- to over-consolidation. The effects of the cyclic groundwater level oscillation on deformation were investigated using repeated loading and unloading tests. Void ratio changes in loading/unloading cycles illustrate that inelastic deformation rate decreases gradually and elastic deformation rate remains almost unchanged with increases of cyclic numbers. The deformation of soil samples from 100 to 400m is mostly elastic for loading stress in the over-consolidation stress range. These findings suggest that groundwater dewatering in the shallow (depth <100m) aquifer will be the primary target to control land subsidence. Groundwater level fluctuations higher than pre-consolidation value in 100-400m only lead to elastic and recoverable deformation even small residual permanent deformation may continue for a long time. The results improve the understanding of deformation in complex urban aquifers affected by groundwater level fluctuations and highlight the importance of city planning management for controlling land subsidence in coastal cities. |
| WOS关键词 | VALLEY ; CONSOLIDATION ; PERMEABILITY ; MANAGEMENT ; WITHDRAWAL ; CALIFORNIA ; BEHAVIOR ; UPLIFT ; BASIN ; CLAY |
| 资助项目 | National Key R&D Program of China[2016YFE0102400] ; China Geological Survey Project[121201006000182401] ; China Geological Survey Project[121201006000150009] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000458859400002 |
| 出版者 | SPRINGER |
| 资助机构 | National Key R&D Program of China ; China Geological Survey Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/49393]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Han, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.China Geol Survey, Tianjin Ctr, Tianjin 300170, Peoples R China 3.CGS Key Lab Muddy Coast Geoenvironm, Tianjin 300170, Peoples R China 4.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Jilong,Cao, Guoliang,Han, Dongmei,et al. Deformation of the aquifer system under groundwater level fluctuations and its implication for land subsidence control in the Tianjin coastal region[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2019,191(3):14. |
| APA | Yang, Jilong.,Cao, Guoliang.,Han, Dongmei.,Yuan, Haifan.,Hu, Yunzhuang.,...&Chen, Yongsheng.(2019).Deformation of the aquifer system under groundwater level fluctuations and its implication for land subsidence control in the Tianjin coastal region.ENVIRONMENTAL MONITORING AND ASSESSMENT,191(3),14. |
| MLA | Yang, Jilong,et al."Deformation of the aquifer system under groundwater level fluctuations and its implication for land subsidence control in the Tianjin coastal region".ENVIRONMENTAL MONITORING AND ASSESSMENT 191.3(2019):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。