A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study on artificial recharge and well loss in confined aquifers using theoretical and back-analysis calculations of hydrogeological parameters from recharge and pumping tests
https://orcid.org/0000-0002-2331-5502
Abstract The main components of the confined aquifer in Tianjin are silt and silty sand. In addition, when the recharge of a shallow confined aquifer is used in deep excavation engineering to control the subsidence caused by pressure relief, the recharge cone and well loss require attention. Pressure recharge is often used to improve the efficiency of recharging. However, in the process of pressure recharge, the phenomena of recharge failure and water burst easily appear. In this study, single-well pumping, natural recharge, and pressure recharge tests were conducted at a green field site. Pressure recharge can further improve the recharge efficiency and reduce the number of recharge wells and the cost of recharge. Compared with clay sealing of the well wall’s outer hole, grouting sealing with slurry cement can significantly improve the recharge pressure and efficiency. The water level rise is close to the water level drawdown in the aquifer farther than 5 m from the recharge/pumping well based on the monitoring results. However, close to the recharge/pumping well in the aquifer, the water level rise in recharge is higher than the drawdown in pumping. In particular, the well loss in the recharge test is much greater than that in the pumping test because aquifer clogging occurs in recharge at the same flow rate. Based on the field test results, an equation to predict the well loss in recharge of the third confined aquifer in the Tianjin area is proposed.
Study on artificial recharge and well loss in confined aquifers using theoretical and back-analysis calculations of hydrogeological parameters from recharge and pumping tests
https://orcid.org/0000-0002-2331-5502
Abstract The main components of the confined aquifer in Tianjin are silt and silty sand. In addition, when the recharge of a shallow confined aquifer is used in deep excavation engineering to control the subsidence caused by pressure relief, the recharge cone and well loss require attention. Pressure recharge is often used to improve the efficiency of recharging. However, in the process of pressure recharge, the phenomena of recharge failure and water burst easily appear. In this study, single-well pumping, natural recharge, and pressure recharge tests were conducted at a green field site. Pressure recharge can further improve the recharge efficiency and reduce the number of recharge wells and the cost of recharge. Compared with clay sealing of the well wall’s outer hole, grouting sealing with slurry cement can significantly improve the recharge pressure and efficiency. The water level rise is close to the water level drawdown in the aquifer farther than 5 m from the recharge/pumping well based on the monitoring results. However, close to the recharge/pumping well in the aquifer, the water level rise in recharge is higher than the drawdown in pumping. In particular, the well loss in the recharge test is much greater than that in the pumping test because aquifer clogging occurs in recharge at the same flow rate. Based on the field test results, an equation to predict the well loss in recharge of the third confined aquifer in the Tianjin area is proposed.
Study on artificial recharge and well loss in confined aquifers using theoretical and back-analysis calculations of hydrogeological parameters from recharge and pumping tests
https://orcid.org/0000-0002-2331-5502
Abstract The main components of the confined aquifer in Tianjin are silt and silty sand. In addition, when the recharge of a shallow confined aquifer is used in deep excavation engineering to control the subsidence caused by pressure relief, the recharge cone and well loss require attention. Pressure recharge is often used to improve the efficiency of recharging. However, in the process of pressure recharge, the phenomena of recharge failure and water burst easily appear. In this study, single-well pumping, natural recharge, and pressure recharge tests were conducted at a green field site. Pressure recharge can further improve the recharge efficiency and reduce the number of recharge wells and the cost of recharge. Compared with clay sealing of the well wall’s outer hole, grouting sealing with slurry cement can significantly improve the recharge pressure and efficiency. The water level rise is close to the water level drawdown in the aquifer farther than 5 m from the recharge/pumping well based on the monitoring results. However, close to the recharge/pumping well in the aquifer, the water level rise in recharge is higher than the drawdown in pumping. In particular, the well loss in the recharge test is much greater than that in the pumping test because aquifer clogging occurs in recharge at the same flow rate. Based on the field test results, an equation to predict the well loss in recharge of the third confined aquifer in the Tianjin area is proposed.
Study on artificial recharge and well loss in confined aquifers using theoretical and back-analysis calculations of hydrogeological parameters from recharge and pumping tests
Cao, Jianran (author) / Li, Qinghan (author) / Cheng, Xuesong (author) / Zheng, Gang (author) / Ha, Da (author) / Zeng, Chaofeng (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Infiltration and Anti-Filtration Recharge-Pumping Well and Laboratory Recharge Tests
| DOAJ | 2018
Coupled Solution for Forced Recharge in Confined Aquifers
| British Library Online Contents | 2009
Coupled Solution for Forced Recharge in Confined Aquifers
| Online Contents | 2009
| British Library Online Contents | 2017