Xiao‐Wei Jiang

China University of Geosciences (Beijing)

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Xu‐Sheng Wang

Guangxi University of Chinese Medicine

Li Wan

China University of Geosciences (Beijing)

Li Wan

Nanjing University of Aeronautics and Astronautics

Hailong Li

Southern University of Science and Technology

Jun‐Zhi Wang

Yellow River Institute of Hydraulic Research

Li Wan

Ministry of Water Resources of the People's Republic of China

Huaming Guo

China University of Geosciences (Beijing)

Xuejing Wang

Tianjin University

Shemin Ge

University of Colorado Boulder

Yijian Zeng

University of Twente

Cooperative Institutions

China University of Geosciences (Beijing)

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Ministry of Water Resources of the People's Republic of China

Southern University of Science and Technology

China University of Geosciences

Ministry of Natural Resources

Peking University

Fudan University

Chinese Academy of Geological Sciences

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A method for simultaneous estimation of groundwater evapotranspiration and inflow rates in the discharge area using seasonal water table fluctuations

Journal of Hydrology (2017)

Xiao‐Wei Jiang Zhichao Sun Keyu Zhao Fu-Sheng Shi Li Wan

Inflow

Aridity index

Water balance

Table (database)

10.1016/j.jhydrol.2017.03.026

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Citations (42)

Evaluation of depth-dependent porosity and bulk modulus of a shear using permeability–depth trends

International Journal of Rock Mechanics and Mining Sciences (2009)

Xu‐Sheng Wang Xiao‐Wei Jiang Li Wan Guang‐Ling Song Qiang Xia

Shear modulus

10.1016/j.ijrmms.2009.02.002

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Citations (46)

Submarine Groundwater Discharge in the Northern Bohai Sea, China: Implications for Coastal Carbon Budgets and Buffering Capacity

Journal of Geophysical Research Biogeosciences (2022)

Yan Zhang Changpei Zou Zhaohui Aleck Wang Xuejing Wang Zhenzhong Zeng

Abstract Submarine groundwater discharge (SGD) has been widely recognized as an important source of dissolved nutrients in coastal waters and affects nutrient biogeochemistry. In contrast, little information is available on SGD impacts on coastal carbon budgets. Here, we assessed the SGD and associated carbon (dissolved inorganic carbon [DIC] and total alkalinity [TA]) fluxes in Liaodong Bay (the largest bay of the Bohai Sea, China) and discussed their border implications for coastal DIC budget and buffering capacity. Based on 223 Ra and 228 Ra mass balance models, the SGD flux was estimated to be (0.92–1.43) × 10 9 m 3 d −1 . SGD was the largest contributor of DIC, accounting for 55%–77% of the total DIC sources. The low ratio (<1) of SGD‐derived TA to DIC fluxes and negative correlation between radium isotopes and pH in seawater implied that SGD would potentially reduce seawater pH in Liaodong Bay. Combining the groundwater carbon data in Liaodong Bay with literature data, we found that the SGD‐derived DIC flux off China was 4–9 times greater than those from rivers. By analyzing the TA/DIC ratios in groundwater along the Chinese coast and related carbon fluxes, SGD was thought to partially reduce the CO 2 buffer capacity in receiving seawater. These results obtained at the bay scale and national scale suggest that SGD is a significant component of carbon budget and may play a critical role in modulating coastal buffering capacity and atmospheric CO 2 sequestration.

Submarine groundwater discharge

Total inorganic carbon

Alkalinity

10.1029/2022jg006810

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Measuring in situ vertical hydraulic conductivity in tidal environments

Advances in Water Resources (2014)

Xuejing Wang Hailong Li Jinzhi Yang Li Wan Xu‐Sheng Wang

Finite difference

Slug test

Hydraulic head

10.1016/j.advwatres.2014.05.004

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Citations (20)

Reply on RC2

Xiao‐Wei Jiang

Abstract. Freezing-induced groundwater-level decline is widely observed in regions with a shallow water table, but many existing studies on freezing-induced groundwater migration do not account for freezing-induced water-level fluctuations. Here, by combining detailed field observations of liquid soil water content and groundwater-level fluctuations at a site in the Ordos Plateau, China, and numerical modeling, we showed that the interaction of soil water and groundwater dynamics was controlled by wintertime atmospheric conditions and topographically driven lateral groundwater inflow. With an initial water table depth of 120âcm and a lateral groundwater inflow rate of 1.03âmmâd^â1, the observed freezing and thawing-induced fluctuations of soil water content and groundwater level are well reproduced. By calculating the budget of groundwater, the mean upward flux of freezing-induced groundwater loss is 1.46âmmâd^â1 for 93âd, while the mean flux of thawing-induced groundwater recharge is as high as 3.94âmmâd^â1 for 32âd. These results could be useful for local water resources management when encountering seasonally frozen soils and for future studies on two- or three-dimensional transient groundwater flow in semi-arid and seasonally frozen regions. By comparing models under a series of conditions, we found the magnitude of freezing-induced groundwater loss decreases with initial water table depth and increases with the rate of groundwater inflow. We also found a fixed-head lower boundary condition would overestimate freezing-induced groundwater migration when the water table depth is shallow. Therefore, an accurate characterization of freezing-induced water table decline is critical to quantifying the contribution of groundwater to hydrological and ecological processes in cold regions.

Inflow

10.5194/hess-2020-657-ac2

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Three-dimensional inter-basin groundwater flow toward a groundwater-fed stream: Identification, partition, and quantification

Journal of Hydrology (2023)

Pengfei Han Xu‐Sheng Wang Yangxiao Zhou Zhi Yang Li Wan

Base flow

Groundwater discharge

Groundwater model

Infiltration (HVAC)

10.1016/j.jhydrol.2023.130524

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Citations (5)

Numerical modelling of fractures induced by coal mining beneath reservoirs and aquifers in China

Quarterly Journal of Engineering Geology and Hydrogeology (2013)

Xiong Wu Xiao‐Wei Jiang Yufu Chen Xiaolei Wang Shu-Hong Tan

The increasing demand in recent years for energy in China has resulted in coal being mined in complex geological conditions. This has included the mining of coal seams located beneath reservoirs, aquifers and flooded abandoned mine workings. Throughout China the extraction of coal in these circumstances has resulted in groundwater inrushes into working mines. This has caused loss of lives, disruption or abandonment of coal mining, and the sterilization of coal resources. This paper demonstrates that numerical modelling using ANSYS-2D, FLAC-2D and FLAC-3D combined with field observations may provide a method for the modelling of fractures that develop in the rock mass above a roof of coal mines. These fractures may increase significantly the permeability of the strata and groundwater flows into mine workings.

10.1144/qjegh2010-005

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Citations (6)

Physics-informed machine learning for understanding rock moisture dynamics in a sandstone cave

Kai-Gao Ouyang Xiao‐Wei Jiang Gang Mei Hong‐Bin Yan Ran Niu

Abstract. Rock moisture, which is considered as a hidden component of the terrestrial hydrological cycle, has received little attention. In this study, the frequency-domain reflectometry (FDR) is used to obtain fluctuating rock water content in a sandstone cave of the Yungang Grottoes, China. We identified two major cycles of rock moisture addition and depletion, one in the summer and the other in the winter. By using the LSTM (Long Short-Term Memory) network and the SHAP (SHapley Additive exPlanations) method, relative humidity, air temperature and wall temperature are found to have contributions to rock moisture in the summer. By using vapor concentration and the difference between dew point temperature and wall temperature as two input variables of the LSTM network, the predicted rock water content has a very good agreement with the measured rock water content, with the Nash–Sutcliffe efficiency coefficient (NSE) being as high as 0.978. Because the two new input variables are factors directly controlling vapor condensation, they provide informative priors to the deep learning model and improved prediction performance. After identifying the causal factors of rock water content fluctuations, we also identified the mechanism controlling the multi diurnal vapor condensation. The increased vapor concentration accompanying a precipitation event leads to transport of water vapor into rock pores, which is subsequently adsorbed onto the surface of rock pores and then condensed into liquid water. With the aid of the deep learning model, this study increases understanding of sources of water in caves, which would contribute to future strategies of alleviating weathering in caves.

Dew point

Dew

10.5194/hess-2022-403

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Citations (0)

Restriction of groundwater recharge and evapotranspiration due to a fluctuating water table: a study in the Ordos Plateau, China

Hydrogeology Journal (2020)

Keyu Zhao Xiao‐Wei Jiang Xu‐Sheng Wang Li Wan

Water balance

10.1007/s10040-020-02208-9

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Citations (19)

Flowing wells: terminology, history and role in the evolution of groundwater science

Hydrology and earth system sciences (2020)

Xiao‐Wei Jiang John A. Cherry Li Wan

Abstract. The gushing of water from flowing wells attracted public attention and scientific curiosity as early as the 17th century, but little attention has been paid to the influence of flowing wells on the evolution of groundwater science. This study asserts that questions posed by flowing wells since the early 19th century led to the birth of many fundamental concepts and principles of physical hydrogeology. Due to the widespread occurrence of flowing wells in basins with regional aquitards, there is a long-lasting misconception that flowing wells could only occur in regionally confined aquifers. However, the recognition of possible occurrence of flowing wells in unconfined aquifers was anticipated at the turn of the 20th century based on observed increases in hydraulic head with depth in topographic lows of basins without apparent aquitards. This was later verified in the 1960s by field and modeling studies that gave birth to quantitative analysis of topographically driven groundwater flow systems, which was a paradigm shift in hydrogeology. Following this paradigm, several preconditions for flowing wells established in the 19th century were found unnecessary. Intermingled in the evolution of flow system concepts are inconsistencies and confusion concerning the use of the term “artesian”, so we propose avoidance of this term. This historical perspective of the causes of flowing well conditions and the influence of flowing wells on groundwater science could lead to a deeper understanding of the evolution of groundwater science and guide future studies on hydraulics of flowing wells.

10.5194/hess-24-6001-2020

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Citations (7)