We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evaluation of dewatering-induced hydraulic and ground responses of thick multi-aquifer sandy strata without acquitards.
- Authors
Fan, Dongdong; Tan, Yong; Tang, Yongjing; Wang, Dalong
- Abstract
Under high ground water levels, thick multi-aquifer sandy strata without acquitards threaten the safe construction of underground structures, which frequently caused severe ground subsidence and damages to adjacent urban environments. Despite this, currently few researches about the hydraulic and ground responses due to pumping in such strata were available in literature. Construction of subways in Nantong, a typical coastal city located at the estuary area of the Yangtze River in China and featuring thick water-rich sandy strata, provided a rare chance for investigation on this topic. Based on comprehensive field pumping tests, both the hydraulic and ground response of the full-profile water-rich sandy strata due to dewatering were explored first. Then, both analytical and numerical methods were adopted for in-depth analyses. The results indicate that due to the absence of acquitards, there existed a strong hydraulic connection between the aquifers. Apart from the hydraulic parameters, the hydraulic recharge between aquifers has impact on the hydraulic performance as well when pumping was carried out at different burial depths. On the basis of considering the hydraulic performance of aquifers and the hydraulic connection between them, the optimal pumping scheme for underground construction or domestic water use was discussed. The findings of this study provide an insight into the distinctive full-profile water-rich sandy strata and can help engineers adopt appropriate measures to deal with pumping works under similar geohydrology conditions.
- Subjects
CHINA; AQUIFERS; UNDERGROUND construction; GROUNDWATER; WATER levels; HYDROGEOLOGY; GROUNDWATER recharge
- Publication
Environmental Earth Sciences, 2024, Vol 83, Issue 1, p1
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-023-11315-1