Article
Engineering, Geological
Nian-Wu Liu, Chen-Xin Peng, Ming-Guang Li, Jin-Jian Chen
Summary: This study conducted a coupled hydro-mechanical numerical analysis on a case history of a deep excavation with dewatering and recharge construction measures. The results revealed that the drawdown of the confined aquifer was closely correlated to dewatering and recharge activities. Excavation-induced settlement mainly occurred in soft soil layers, while stratum deformation occurred in the aquifer and adjacent aquitards.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Civil
Chao-Feng Zeng, Shuo Wang, Xiu-Li Xue, Gang Zheng, Guo-Xiong Mei
Summary: Dewatering of foundation pits can lead to environmental issues such as ground settlement. Studies show that the location of the greatest settlement induced by dewatering can vary, appearing either in deep aquifers or at the ground surface. Different dewatering conditions affect the evolution of the LoGS.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Geological
Chen-Xin Peng, Nian-Wu Liu, Ming-Guang Li, Liang Zhen, Jin-Jian Chen
Summary: The study shows that dewatering during deep excavation can reduce excavation-induced wall deformations by decreasing the external load on the wall and increasing resistance on the excavated side. Parametric analyses indicate that wall deformations decrease as the insertion depth increases if partially penetrated into the aquifer, and increasing the discharge rate or decreasing hydraulic conductivity for the confined aquifer could result in smaller wall deformations.
Article
Engineering, Civil
Chao-Feng Zeng, Hong -Bo Chen, Huan Liao, Xiu-Li Xue, Qiu-Nan Chen, Yu Diao
Summary: When an excavation is close to an existing underground structure that penetrates aquifers, the structure can change groundwater seepage and restrict strata movement, resulting in water-blocking and soil-blocking effects. The barrier effect of a metro station as an underground structure was investigated numerically in this study. The results show that considering the barrier effect reduces the overall water yield of the excavation while increasing the induced groundwater drawdown. The behavior of strata under the barrier effect is more complex and depends on the coupled action of water-blocking and soil-blocking effects, which are influenced by the excavation width and distance between the station and the excavation.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Hai-Min Lyu, Shui-Long Shen, Yong-Xia Wu, An-Nan Zhou
Summary: This paper analyzes the mechanism of blocking effects from a close barrier in confined aquifer and proposes a simple equation based on analytical solution to calculate groundwater heads inside and outside of the excavation pit with a waterproof curtain. The distribution of groundwater head is derived under two conditions: pumping with a constant water head and pumping with a constant flow rate. The proposed model is verified by numerical simulation and experimental results, demonstrating its applicability in engineering practice.
GEOSCIENCE FRONTIERS
(2021)
Article
Engineering, Geological
Chao-Feng Zeng, Shuo Wang, Xiu-Li Xue, Gang Zheng, Guo-Xiong Mei
Summary: This study investigated the influence of dewatering in a foundation pit on ground settlement through in situ pumping tests and numerical simulations. The results showed that the combined actions of enclosure wall movement and groundwater drawdown caused ground settlement, and the individual impacts of these two factors on settlement could be separated.
Article
Chemistry, Multidisciplinary
Xiaotian Liu, Jianxiu Wang, Tianliang Yang, Lujun Wang, Na Xu, Yanxia Long, Xinlei Huang
Summary: This research focuses on the relationship between groundwater and stratified settlement in deltas, proposing three stages of stratified settlement and conducting large-scale physical model tests to verify. Uneven settlement caused by dewatering may damage existing buildings and underground structures, highlighting the importance of expansion-induced seismicity and vibration around buildings.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Geological
Chenxi Zhao, Qinghua Lei, Zixin Zhang, Simon Loew
Summary: The study develops a three-dimensional fully-coupled hydro-mechanical model to simulate groundwater drainage, stress redistribution, rock mass consolidation, and fault zone deformation. The results indicate that ground surface displacements originate from deep subsurface water drainage and rock mass consolidation, and the construction of the high-speed tunnel could trigger fault shearing via drainage-induced pressure diffusion and poroelastic stressing. This research has important implications for groundwater drainage-related geoengineering activities.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Civil
Fred T. Tracy, Farshid Vahedifard
Summary: This paper presents an analytical solution for simulating water infiltration in unsaturated soils, taking into account the hydro-mechanical coupling and the effects of soil parameters. The solution can be used for site-specific or regional-scale analyses, and it serves as a benchmark for validating numerical methods.
JOURNAL OF HYDROLOGY
(2022)
Article
Construction & Building Technology
Linglin Li, Zhen Zhang, Zhongyuan Wang, Yichao Wu, Mansheng Dong, Yuqing Zhang
Summary: This study characterises the triple physics of thermal, hydraulic, and mechanical fields in saturated asphalt pavement under vehicle load. A thermo-hydro-mechanical model was proposed and validated for its effectiveness in predicting mechanical performance, temperature profile, and hydro-mechanical performance of asphalt pavement. Results show the importance of thermal deformation and thermoviscoelasticity, as well as the role of pore water in the pavement behavior under different conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Chao-Feng Zeng, Huan Liao, Xiu-Li Xue, Si-Chun Long, Gui-Jun Luo, Yu Diao, Ming-Guang Li
Summary: In urban environments, existing underground structures such as metro stations can significantly impact groundwater and soil responses to dewatering processes. The study found that water-blocking and soil-blocking effects can lead to opposite soil responses, and the distance between the metro station and excavation pit can determine which effect dominates the soil response during dewatering.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Tengyun Xue, Xiuli Xue, Sichun Long, Qiunan Chen, Shide Lu, Chaofeng Zeng
Summary: A numerical model was developed to study the characteristics of groundwater flow and strata movement induced by dewatering and excavation with consideration of the barrier effect of pre-existing underground structures. The influence of adjacent structures on the movement of groundwater and strata was revealed through comparing different working conditions. The results showed that pile foundations have different effects on groundwater flow and excavation deformation.
Article
Environmental Sciences
Xu-wei Wang, Ye-shuang Xu
Summary: This study investigates the impact of diaphragm wall buried depth on groundwater drawdown in foundation dewatering, providing a relationship between wall penetrating depth and hydraulic parameters ratio. Effective, suggested, and control values are proposed for practical engineering applications.
Article
Environmental Sciences
Connor Mullen, Marc F. Mueller, Gopal Penny, Fengwei Hung, Diogo Bolster
Summary: The common-pool nature of groundwater resources leads to over-pumping. In transboundary aquifers, differences in economic and hydrogeologic conditions between users can either dampen or amplify incentives to over-pump. Combinations of different types of user asymmetry can enhance common-pool overdraft.
WATER RESOURCES RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Kaifang Yang, Changjie Xu, Minliang Chi, Pei Wang
Summary: Dewatering of foundation pits with a suspended waterproof curtain can eliminate the adverse effects on the surrounding environment, and the magnitude of drawdown difference represents the extent of groundwater affected by drawdown inside the pit. Optimal values for the radius of the pit and length of the curtain can help stabilize the drawdown difference.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Arfan Arshad, Ali Mirchi, Javier Vilcaez, Muhammad Umar Akbar, Kaveh Madani
Summary: High-resolution, continuous groundwater data is crucial for adaptive aquifer management. This study presents a predictive modeling framework that incorporates covariates and existing observations to estimate groundwater level changes. The framework outperforms other methods and provides reliable estimates for unmonitored sites. The study also examines groundwater level changes in different regions and highlights the importance of effective aquifer management.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Lihua Chen, Jie Deng, Wenzhe Yang, Hang Chen
Summary: A new grid-based distributed karst hydrological model (GDKHM) is developed to simulate streamflow in the flood-prone karst area of Southwest China. The results show that the GDKHM performs well in predicting floods and capturing the spatial variability of karst system.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Faruk Gurbuz, Avinash Mudireddy, Ricardo Mantilla, Shaoping Xiao
Summary: Machine learning algorithms have shown better performance in streamflow prediction compared to traditional hydrological models. In this study, researchers proposed a methodology to test and benchmark ML algorithms using artificial data generated by physically-based hydrological models. They found that deep learning algorithms can correctly identify the relationship between streamflow and rainfall in certain conditions, but fail to outperform traditional prediction methods in other scenarios.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yadong Ji, Jianyu Fu, Bingjun Liu, Zeqin Huang, Xuejin Tan
Summary: This study distinguishes the uncertainty in drought projection into scenario uncertainty, model uncertainty, and internal variability uncertainty. The results show that the estimation of total uncertainty reaches a minimum in the mid-21st century and that model uncertainty is dominant in tropical regions.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Z. R. van Leeuwen, M. J. Klaar, M. W. Smith, L. E. Brown
Summary: This study quantifies the effectiveness of leaky dams in reducing flood peak magnitude using a transfer function noise modelling approach. The results show that leaky dams have a significant but highly variable impact on flood peak magnitude, and managing expectations should consider event size and type.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Zeda Yin, Yasaman Saadati, M. Hadi Amini, Linlong Bian, Beichao Hu
Summary: Combined sewer overflows pose significant threats to public health and the environment, and various strategies have been proposed to mitigate their adverse effects. Smart control strategies have gained traction due to their cost-effectiveness but face challenges in balancing precision and computational efficiency. To address this, we propose exploring machine learning models and the inversion of neural networks for more efficient CSO prediction and optimization.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Qimou Zhang, Jiacong Huang, Jing Zhang, Rui Qian, Zhen Cui, Junfeng Gao
Summary: This study developed a N-cycling model for lowland rural rivers covered by macrophytes and investigated the N imports, exports, and response to sediment dredging. The findings showed a considerable N retention ability in the study river, with significant N imports from connected rivers and surrounding polders. Sediment dredging increased particulate nitrogen resuspension and settling rates, while decreasing ammonia nitrogen release, denitrification, and macrophyte uptake rates.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Xue Li, Yingyin Zhou, Jian Sha, Man Zhang, Zhong-Liang Wang
Summary: High-resolution climate data is crucial for predicting regional climate and water environment changes. In this study, a two-step downscaling method was developed to enhance the spatial resolution of GCM data and improve the accuracy for small basins. The method combined medium-resolution climate data with high-resolution topographic data to capture spatial and temporal details. The downscaled climate data were then used to simulate the impacts of climate change on hydrology and water quality in a small basin. The results demonstrated the effectiveness of the downscaling method for spatially differentiated simulations.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Tongqing Shen, Peng Jiang, Jiahui Zhao, Xuegao Chen, Hui Lin, Bin Yang, Changhai Tan, Ying Zhang, Xinting Fu, Zhongbo Yu
Summary: This study evaluates the long-term interannual dynamics of permafrost distribution and active layer thickness on the Tibetan Plateau, and predicts future degradation trends. The results show that permafrost area has been decreasing and active layer thickness has been increasing, with an accelerated degradation observed in recent decades. This has significant implications for local water cycle processes, water ecology, and water security.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Chi Zhang, Xu Zhang, Qiuhong Tang, Deliang Chen, Jinchuan Huang, Shaohong Wu, Yubo Liu
Summary: Precipitation over the Tibetan Plateau is influenced by systems such as the Asian monsoons, the westerlies, and local circulations. The Indian monsoon, the westerlies, and local circulations are the main systems affecting precipitation over the entire Tibetan Plateau. The East Asian summer monsoon primarily affects the eastern Tibetan Plateau. The Indian monsoon has the greatest influence on precipitation in the southern and central grid cells, while the westerlies have the greatest influence on precipitation in the northern and western grid cells. Local circulations have the strongest influence on the central and eastern grid cells.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Manuel Almeida, Antonio Rodrigues, Pedro Coelho
Summary: This study aimed to improve the accuracy of Total Phosphorus export coefficient models, which are essential for water management. Four different models were applied to 27 agroforestry watersheds in the Mediterranean region. The modeling approach showed significant improvements in predicting the Total Phosphorus diffuse loads.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yutao Wang, Haojie Yin, Ziyi Wang, Yi Li, Pingping Wang, Longfei Wang
Summary: This study investigated the distribution and transformation of dissolved organic nitrogen (DON) in riverbed sediments impacted by effluent discharge. The authors found that the spectral characteristics of dissolved organic matter (DOM) in surface water and sediment porewater could be used to predict DON variations in riverbed sediments. Random forest and extreme gradient boosting machine learning methods were employed to provide accurate predictions of DON content and properties at different depths. These findings have important implications for wastewater discharge management and river health.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Saba Mirza Alipour, Kolbjorn Engeland, Joao Leal
Summary: This study assesses the uncertainty associated with 100-year flood maps under different scenarios using Monte Carlo simulations. The findings highlight the importance of employing probabilistic approaches for accurate and secure flood maps, with the selection of probability distribution being the primary source of uncertainty in precipitation.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Janine A. de Wit, Marjolein H. J. van Huijgevoort, Jos C. van Dam, Ge A. P. H. van den Eertwegh, Dion van Deijl, Coen J. Ritsema, Ruud P. Bartholomeus
Summary: The study focuses on the hydrological consequences of controlled drainage with subirrigation (CD-SI) on groundwater level, soil moisture content, and soil water potential. The simulations show that CD-SI can improve hydrological conditions for crop growth, but the success depends on subtle differences in geohydrologic characteristics.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Constantin Seidl, Sarah Ann Wheeler, Declan Page
Summary: Water availability and quality issues will become increasingly important in the future due to climate change impacts. Managed Aquifer Recharge (MAR) is an effective water management tool, but often overlooked. This study analyzes global MAR applications and identifies the key factors for success, providing valuable insights for future design and application.
JOURNAL OF HYDROLOGY
(2024)