Article
Environmental Sciences
Yunquan Wang, Rui Ma, Gaofeng Zhu
Summary: This study introduces a novel method to predict hydraulic conductivity curves (HCCs) fully from the soil water retention curve (SWRC) without requiring additional parameters. Testing with soil samples shows that this method significantly improves the prediction of HCC compared to traditional methods.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Shmuel Assouline
Summary: The properties of the upper soil layer play a crucial role in determining infiltration, runoff, and evaporation processes, essential for soil agricultural and hydrological functioning. Understanding important hydrological and agricultural functions based on soil water retention characteristics can provide valuable insights for efficient design and planning in agricultural and hydrological applications.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Jipeng Shan, Zhenlei Yang, Xingxing Kuang, Ling Li, Junguo Liu
Summary: This study aims to investigate the performances of seven Weibull distribution models for predicting relative hydraulic conductivity (RHC). By comparing with other six models, it is found that the proposed model performs the best in RHC prediction, with a 16.1% improvement compared to existing models. The proposed model can be used for RHC parameterization in water flow modeling in the unsaturated zone.
WATER RESOURCES RESEARCH
(2022)
Article
Soil Science
Xingxing Kuang, Jiu Jimmy Jiao, Jipeng Shan, Zhenlei Yang
Summary: A new modification to the van Genuchten soil water retention model is proposed, aiming to improve the agreement between predicted and measured relative hydraulic conductivity by combining with the Mualem model. The modified model, MVG-BCB, shows significant improvement in predicting relative hydraulic conductivity for soils with varied textures, eliminating sharp drops near saturation.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
D. Moret-Fernandez, B. Latorre, M. Lopez, Y. Pueyo, J. Tormo, J. M. Nicolau
Summary: Estimating the van Genuchten parameters and saturated hydraulic conductivity of undisturbed soil samples is crucial for water flow simulations. The study proposed a method to optimize the parameters and applied it to different soil cores, detecting significant differences in hydraulic properties. The relationship between theoretical and optimized values was found to be robust.
Article
Engineering, Geological
Qian Zhai, Harianto Rahardjo, Alfrendo Satyanaga, Yiyao Zhu, Guoliang Dai, Xueliang Zhao
Summary: Rainfall-induced slope failures are mainly caused by infiltrated rainwater reducing soil shear strength. This study proposes a method for estimating the hydraulic conductivity function (HCF) of unsaturated soil during the wetting process based on the drying soil-water characteristic curve (SWCC). The estimation considers ink-bottle and rain-drop effects on the hysteresis of SWCC and was verified using experimental data from published literature.
ENGINEERING GEOLOGY
(2021)
Article
Environmental Sciences
Yunquan Wang, Jieliang Zhou, Rui Ma, Gaofeng Zhu, Yongyong Zhang
Summary: This paper presents a simple method for predicting soil hydraulic properties in dry conditions, which overcomes the limitations of existing methods. By applying this method to a new soil hydraulic model, more accurate predictions of soil water content and hydraulic conductivity can be achieved.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Studies
Marina Butylkina, Elena Ikkonen
Summary: The application of secondary pulp and paper sludge has a positive impact on the water and thermal properties of Retisol as well as the growth parameters of lettuce, indicating its potential for improving soil characteristics and plant productivity.
Article
Geochemistry & Geophysics
Aparimita Priyadarshini Naik, Sreeja Pekkat
Summary: This study analyzed the use of a mini disk infiltrometer (MDI) for the indirect determination of wetting water retention characteristics curve (WWRCC) parameters (alpha, n) and saturated hydraulic conductivity (K-s). The results showed that MDI is a reliable, non-invasive, and non-destructive method for quick estimation of WWRCC parameters.
Article
Environmental Sciences
Behzad Ghanbarian, Brandon A. Yokeley
Summary: Grouping soils based on similarities in their textural, taxonomic, and/or structural properties has broad applications to pedology, hydrology, and soil science. In this study, a new approach for classifying soils using hydraulic conductivity data was presented, and eight different soil classes were identified within the studied data set by calculating critical pore sizes and grouping soils with similar characteristics.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Sascha C. Iden, Johanna R. Blocher, Efstathios Diamantopoulos, Wolfgang Durner
Summary: Evaporation experiments are commonly used for determining soil hydraulic properties, with film flow identified as a significant factor in influencing the soil hydraulic conductivity and evaporation rate. The results show that the Richards equation can be used for identifying hydraulic properties without bias from evaporation experiments.
WATER RESOURCES RESEARCH
(2021)
Review
Green & Sustainable Science & Technology
Shakeel Ahmad Bhat, Alban Kuriqi, Mehraj U. Din Dar, Owais Bhat, Saad Sh Sammen, Abu Reza Md Towfiqul Islam, Ahmed Elbeltagi, Owais Shah, Nadhir AI-Ansari, Rawshan Ali, Salim Heddam
Summary: Biochar, a carbon-based substance made from organic waste, is frequently added to soil for its benefits in improving soil quality and crop production. However, its impact on soil physical properties is not well understood. This review aims to describe the influence of biochar on important physical and hydrological properties of soil.
Article
Engineering, Civil
D. Moret-Fernandez, B. Latorre
Summary: The determination of saturated hydraulic conductivity and water retention curve is crucial in studying the hydraulic behavior of the vadose zone. This study presents a new laboratory procedure to estimate these parameters using an inverse analysis of drainage steady-state curves. The method was successfully applied to different soil samples and provided accurate estimates of the parameters.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Civil
B. Latorre, D. Moret-Fernandez
Summary: This study presents a laboratory procedure to estimate the hydraulic conductivity of soil water preferential flow. The method was validated on different soil types and management practices, and results showed significant differences in hydraulic properties.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Geological
Wael M. Albadri, Mohd Jamaludin Md Noor, Israa J. Alhani
Summary: This technical paper evaluates the shear strength of unsaturated sand under different hydraulic phases and proposes a multi-surfaces envelope model to fit and predict the shear strength. The study shows that the water retention curve (WRC) is capable of estimating unsaturated soil property functions and anticipating the soil shear strength behavior under different hydraulic phases.
Article
Water Resources
Zhaoyang Luo, Jun Kong, Lili Yao, Chunhui Lu, Ling Li, D. A. Barry
Summary: Watertable fluctuations in coastal unconfined aquifers, characterized by their interaction with the vadose zone and the creation of a dynamic effective porosity, have been studied. A new expression for the dynamic effective porosity, based on a dimensionless parameter related to the fluctuation frequency, has been proposed and implemented into a modified Boussinesq equation. The dispersion relation arising from the modified equation accurately predicts laboratory experimental data, highlighting the importance of the dynamic effective porosity in modeling watertable fluctuations in coastal unconfined aquifers.
ADVANCES IN WATER RESOURCES
(2023)
Article
Engineering, Civil
Xiaogang Chen, Peiyuan Zhu, Yan Zhang, Ling Li
Summary: Seasonal rainfall, known as plum rain, has the potential to influence greenhouse gas dynamics in saltmarshes. However, there have been no reported studies on its effects. This study quantified porewater exchange and greenhouse gas fluxes in a saltmarsh over a tidal cycle during the plum rain season. The results show that plum rain-derived porewater exchange significantly increased CO2 inventory and reduced pH, potentially contributing to coastal acidification.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Shengjie Hu, Zhenlei Yang, Sergio A. G. Torres, Zipeng Wang, Ling Li
Summary: Through a systematic investigation of 23,259 lakes in 11 hydroclimatic zones of China, it was found that there are differences in the fractal scaling relationships between the morphometric and hydrological parameters of lakes. While lake morphometric parameters follow a power law distribution, lake hydrological parameters do not show a power law relationship with lake area. The study also revealed that the applicability of the power law distribution for lake area varies across different regions and is significantly influenced by human activities.
Article
Environmental Sciences
Chengji Shen, Yu Fan, Yongqing Zou, Chunhui Lu, Jun Kong, Yue Liu, Ling Li, Chenming Zhang
Summary: Salt pans are important features in coastal marshes and their formation is influenced by factors such as evaporation rate, tidal amplitude, and marsh platform slope. This study found that salt pans tend to form in the lower supratidal zone due to sustained evaporation, while they can hardly grow in the intertidal zone due to regular tidal flushing. The decrease in potential evaporation rate, tidal amplitude, and/or marsh platform slope strengthens the hydraulic connection between the marsh surface and underlying watertable, resulting in thicker and wider salt pans. These findings contribute to a better understanding of marsh eco-hydrology and provide guidance for preventing their degradation.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Tingchang Yin, Teng Man, Ling Li, Sergio Andres Galindo-Torres
Summary: We propose a finite-size scaling hypothesis to predict the global permeability of fracture networks. To validate the hypothesis, we generate numerous discrete fracture networks and numerically calculate the permeability. Our results show that the dimensionless permeability, scaled by moments of local conductivity and fracture sizes and corrected by two stereological ratios, can capture variations in fracture attributes. The universal form obtained in this study can also explain contradictory observations regarding the permeability and domain size of fracture networks. We demonstrate how a clear transition point is obtained from this universal form, where the permeability remains constant with changing domain size. This study provides a solid theoretical foundation to understand the connection between fracture attributes and field-scale hydraulic properties.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Civil
Jina Yin, Ning Wang, Chunhui Lu, Frank T. -C. Tsai, Huawei Chen
Summary: Countermeasures against seawater intrusion are critical to prevent coastal groundwater resources from deterioration. Subsurface dams have been recognized as effective approaches, but they often produce residual saltwater. This study investigated the removal of residual saltwater using laboratory experiments and numerical simulations. The results found that a minimum effective height is required for complete removal of residual saltwater, and shorter subsurface dams achieve faster removal rates. Saltwater discharge or freshwater recharge near the dam are more effective in desalinization. Extraction and injection have more influence on saltwater removal than aquifer properties.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Huiqiang Wu, Chunhui Lu, Chengji Shen, Yu Ye
Summary: This study presents an analytical methodology for predicting the extent of seawater intrusion and the maximum safe extraction rate in a rectangular coastal aquifer with a subsurface physical barrier. The proposed method is consistent with numerical results and offers a simple alternative to 3D modeling for assessing engineered barriers in coastal aquifers.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Huiqiang Wu, Amir Jazayeri, Adrian D. Werner, Hongwu Tang, Chunhui Lu
Summary: This study investigates the impact of flood events on saline floodplain aquifers and its freshwater lenses. Laboratory experiments and numerical models demonstrate that extensive floodplain inundation leads to larger lenses. The extent of floodplain inundation, hydraulic conductivity, and dispersivity are critical factors controlling the post-flood recession in lens extent and volume. Field-scale simulations indicate that the salt load to the adjacent river increases immediately following the flood event, highlighting the significance of flooding events on the long-term conditions of saline floodplains.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Zhaoyang Luo, Jun Kong, Xiayang Yu, Chunhui Lu, Adrian D. Werner, David A. Barry
Summary: The effects of unsaturated flow on density-dependent solute transport in coastal unconfined aquifers were analyzed using numerical simulations and laboratory experiments. The results showed that unsaturated flow has a more pronounced influence on salt distributions in coastal unconfined aquifers when tides are considered. Neglecting unsaturated flow effects can lead to expansion of the upper saline plume, shrinkage of the saltwater wedge, and overestimation of water and salt exchange across the aquifer-ocean interface.
WATER RESOURCES RESEARCH
(2023)
Article
Water Resources
Yuting Yao, Jun Kong, Chenming Zhang, Zixuan Tang, Chengji Shen, Zhaoyang Luo, Chunhui Lu, Xuejun Feng, Yang Sun
Summary: Tidal wetlands play a crucial role in CO(2) uptake in coastal oceans, but the spatial distribution of tidal microorganisms and their impact on nearshore aquifers have been poorly understood. In traditional models, microbial biomass production is often ignored and reaction rates depend only on nutrient decay. Through our biomass-based model, we identified zones of high microbial biomass that control aerobic respiration, nitrification, and denitrification in nearshore aquifers.
HYDROLOGICAL PROCESSES
(2023)
Article
Engineering, Civil
Yifan Xie, Yi Wang, Jiaxu Zhang, Yu Ye, Chengji Shen, Yipeng Zeng, Jichun Wu, Jian Luo, Chunhui Lu
Summary: This study investigates the influence of tides on seawater intrusion in fractured aquifers through laboratory experiments and numerical models. The results show that tides can expand the variation range of seawater intrusion properties in fractured aquifers and alter the influence patterns of fracture characteristics. These findings have important implications for improving our understanding of the comprehensive impact of tides and fractures on seawater intrusion.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Zhenlei Yang, Zi Li, Xin Tong, Shengjie Hu, Jun Wang, Shuting Ji, Ling Li
Summary: Accurate descriptions of soil hydraulic properties require consideration of both capillary and noncapillary processes. This study extended the Weibull distribution models to complete dryness and compared their performance with the original models. The improved models effectively described the hydraulic properties from saturation to complete dryness. The physically-based approach developed in this study allows for reliable prediction of hydraulic conductivity without the need for fitted conductivity parameters.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Huiqiang Wu, Chunhui Lu
Summary: This study examines the mechanism of residual saltwater removal under seasonal groundwater level fluctuations. The results show that seasonal fluctuations in the groundwater table enhance the dilution of residual saltwater, thereby accelerating its removal. However, a higher dam height is required for complete removal of residual saltwater in the fluctuating head scenario compared to the constant-head scenario.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Qiaoyu Wang, Jie Yang, Ingo Heidbuechel, Xuan Yu, Chunhui Lu
Summary: The excessive use of nitrogen fertilizer has negative effects on drinking water quality and aquatic ecosystems. This study examines the spatiotemporal variation of nitrogen retention and the impact of external nitrogen input heterogeneity on retention capacity and nitrogen export in a small catchment in Germany. The findings highlight the importance of considering land-use patterns and regional wetness conditions to manage surface water quality.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Miao Jing, Estanislao Pujades, Jin Liu, Anna Jurado, Chunhui Lu
Summary: The vertical development of urban space and human activities in property economics have led to anthropic pressure. However, underground structures constructed in urban areas can influence the residence time of groundwater. The paper presents novel analytical solutions for understanding the distribution of groundwater residence time affected by impervious underground structures in confined aquifers under different boundary conditions. The analytical solutions show good agreement with numerical results, indicating their usefulness in estimating residence times and supporting underground space exploitation and environmental risk assessment.
JOURNAL OF HYDROLOGY
(2023)
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)
