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Frontiers of Earth Science

ISSN 2095-0195

ISSN 2095-0209(Online)

CN 11-5982/P

Postal Subscription Code 80-963

2018 Impact Factor: 1.205

Front. Earth Sci.    2020, Vol. 14 Issue (2) : 298-305    https://doi.org/10.1007/s11707-019-0789-1
RESEARCH ARTICLE
Round empty core infiltration and anti-filtration recharge wells and laboratory recharge tests
Yuxi LI, Wanglin LI(), Jiapeng HE, Chunhui ZHANG
School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
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Abstract

Anti-filtration recharge wells are commonly installed in river channels and irrigation canals on the Shandong Peninsula, China, and can be used as an important recharge facility for underground reservoirs. However, during recharge, as the running time increases, the recharge capacity gradually decreases. This study was undertaken to develop a new recharge well and mitigate this deficiency. A round empty core infiltration and anti-filtration recharge well and laboratory recharge test equipment were developed. Subsequently, 1:25 models of the recharge pond, a round empty core recharge wellhead, and an artificial recharge well were prepared. Using equal recharge levels and ambient groundwater levels, laboratory steady-flow recharge tests on the existing anti-filtration recharge well, the new round empty core infiltration and anti-filtration recharge well, and an artificial recharge well were carried out. Experimental data on the measured groundwater table and single-well recharge quantity were also collected and analyzed. The results showed that compared with the existing anti-filtration recharge well, the new round empty core infiltration and anti-filtration recharge well had stronger anti-deposition and anti-scouring properties, and the single-well recharge quantity increased by 403%. With an increase in the number of recharge tests, the single-well recharge quantity gradually decreased and tended to stabilize as a whole.

Keywords recharge well      infiltration function      anti-filtration function      recharge quantity      recharge test     
Corresponding Author(s): Wanglin LI   
Online First Date: 24 December 2019    Issue Date: 21 July 2020
 Cite this article:   
Yuxi LI,Wanglin LI,Jiapeng HE, et al. Round empty core infiltration and anti-filtration recharge wells and laboratory recharge tests[J]. Front. Earth Sci., 2020, 14(2): 298-305.
 URL:  
https://academic.hep.com.cn/fesci/EN/10.1007/s11707-019-0789-1
https://academic.hep.com.cn/fesci/EN/Y2020/V14/I2/298
Fig.1  Diagram of the existing anti-filtration recharge well. (a) Anti-filtration recharge well profile. (b) Recharge pond profile.
Fig.2  Structural diagram of the round empty core IAF recharge well. (a) Schematic diagram of the vertical profile. (b) Round empty core wellhead. (c) A-A profile. (d) B-B profile Figure: 1-recharge wellhead; 2-sidewall; 3-geotextile; 4-ground surface; 5-lateral wall hole; 6-medial wall hole; 7-recharge well; 8-anti-filter material.
Fig.3  Laboratory recharge test equipment. (a) Schematic diagram of test equipment. (b) Test equipment during recharge operation.
Fig.4  Half-wellhead model of the recharge well during recharge test. (a) Round empty core wellhead. (b) Recharge pond.
Fig.5  Arrangement of piezometric tubes at the bottom of the sand tank.
Fig.6  Measured groundwater level.
Name of recharge well Recharge quantity /(L·min−1) Infiltration area of wellhead/cm2
Artificial recharge well 3.96 1.57
Existing anti-filtration recharge well 0.61 32.00
Round empty core IAF recharge well 3.07 43.96
Tab.1  Results of the laboratory steady-state flow recharge test
Fig.7  Curve between the single-well recharge quantity Q and the recharge test time N.
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