Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing
<p>It is of great significance to reveal the mechanism of land subsidence to further find out the mechanism of leakage flow in multi-layer aquifer systems and the water-release compression of weak aquifers. In this paper, conditions of groundwater leakage flow are expounded, and the initial hy...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-04-01
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| Series: | Proceedings of the International Association of Hydrological Sciences |
| Online Access: | https://www.proc-iahs.net/382/309/2020/piahs-382-309-2020.pdf |
| _version_ | 1818024691717111808 |
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| author | K. Lei K. Lei F. Ma J. Liu Y. Luo W. Cui Y. Zhou H. Liu X. Wang M. Tian L. Zhao |
| author_facet | K. Lei K. Lei F. Ma J. Liu Y. Luo W. Cui Y. Zhou H. Liu X. Wang M. Tian L. Zhao |
| author_sort | K. Lei |
| collection | DOAJ |
| description | <p>It is of great significance to reveal the mechanism of
land subsidence to further find out the mechanism of leakage flow in
multi-layer aquifer systems and the water-release compression of weak
aquifers. In this paper, conditions of groundwater leakage flow are
expounded, and the initial hydraulic gradient calculation formula in the
aquitards are deduced. The data of Tianzhu Land Subsidence Monitoring
Station are selected to preliminarily discuss the leakage flow mechanism of
the multi-layer groundwater system and water-release compression of weak
aquifers. The results show that, firstly the weak aquifer layers in the
shallow strata above 91.32 m in Tianzhu Land Subsidence Station are all in
the state of unidirectional drainage consolidation, and the water heads in
the upper strata are higher than those in the lower strata. However, the
hydraulic gradient between the two adjacent aquifers is smaller than the
initial hydraulic gradient in the weak aquifer layer, so no leakage recharge
effect is generated. Secondly, the water level of the two adjacent aquifers
in the deep formation below 91.32 m shows a continuous downward trend, among
which the weak aquifer is drained and consolidated on both sides, and the
pore water head in the middle of the weak aquifer is the lowest. Although
the strata has a large amount of compression, no leakage recharge phenomenon
occurs. Thirdly, in a multi-layer aquifer system, when the head difference
between adjacent aquifers is small and there is a thick viscous layer
between them, it is difficult for the upper aquifer to overcome the shear
strength of the bound water in the weak aquifer below, leaking recharge
barely occurs.</p> |
| first_indexed | 2024-12-10T04:04:15Z |
| format | Article |
| id | doaj.art-97ead6c0d32345bf97ec39a5716b6def |
| institution | Directory Open Access Journal |
| issn | 2199-8981 2199-899X |
| language | English |
| last_indexed | 2024-12-10T04:04:15Z |
| publishDate | 2020-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Proceedings of the International Association of Hydrological Sciences |
| spelling | doaj.art-97ead6c0d32345bf97ec39a5716b6def2022-12-22T02:02:53ZengCopernicus PublicationsProceedings of the International Association of Hydrological Sciences2199-89812199-899X2020-04-0138230931410.5194/piahs-382-309-2020Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in BeijingK. Lei0K. Lei1F. Ma2J. Liu3Y. Luo4W. Cui5Y. Zhou6H. Liu7X. Wang8M. Tian9L. Zhao10Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Geology Prospecting and Developing Bureau, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, ChinaBeijing Institute of Hydrogeology and Engineering Geology, Beijing, 100195, China<p>It is of great significance to reveal the mechanism of land subsidence to further find out the mechanism of leakage flow in multi-layer aquifer systems and the water-release compression of weak aquifers. In this paper, conditions of groundwater leakage flow are expounded, and the initial hydraulic gradient calculation formula in the aquitards are deduced. The data of Tianzhu Land Subsidence Monitoring Station are selected to preliminarily discuss the leakage flow mechanism of the multi-layer groundwater system and water-release compression of weak aquifers. The results show that, firstly the weak aquifer layers in the shallow strata above 91.32 m in Tianzhu Land Subsidence Station are all in the state of unidirectional drainage consolidation, and the water heads in the upper strata are higher than those in the lower strata. However, the hydraulic gradient between the two adjacent aquifers is smaller than the initial hydraulic gradient in the weak aquifer layer, so no leakage recharge effect is generated. Secondly, the water level of the two adjacent aquifers in the deep formation below 91.32 m shows a continuous downward trend, among which the weak aquifer is drained and consolidated on both sides, and the pore water head in the middle of the weak aquifer is the lowest. Although the strata has a large amount of compression, no leakage recharge phenomenon occurs. Thirdly, in a multi-layer aquifer system, when the head difference between adjacent aquifers is small and there is a thick viscous layer between them, it is difficult for the upper aquifer to overcome the shear strength of the bound water in the weak aquifer below, leaking recharge barely occurs.</p>https://www.proc-iahs.net/382/309/2020/piahs-382-309-2020.pdf |
| spellingShingle | K. Lei K. Lei F. Ma J. Liu Y. Luo W. Cui Y. Zhou H. Liu X. Wang M. Tian L. Zhao Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing Proceedings of the International Association of Hydrological Sciences |
| title | Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing |
| title_full | Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing |
| title_fullStr | Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing |
| title_full_unstemmed | Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing |
| title_short | Leaking recharge mechanism in the multi-layer aquifer system of a typical land subsidence area in Beijing |
| title_sort | leaking recharge mechanism in the multi layer aquifer system of a typical land subsidence area in beijing |
| url | https://www.proc-iahs.net/382/309/2020/piahs-382-309-2020.pdf |
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