Article
Construction & Building Technology
Cen Gao, Yueming Zhu, Yawei Zhang
Summary: A stability analysis method for capillary barrier covers was established based on the Green-Ampt model and the Janbu method, considering the water redistribution and the influence of seepage force.
Article
Engineering, Geological
Zhaoying Li, Shiguo Xiao
Summary: This study analyzed the seismic stability of a two-stage soil slope reinforced by one row of piles, considering the pile axial force, and derived an explicit expression of the required pile shear resistance. Results showed that the pile reinforcement effect is effective under smaller seismic conditions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Fhatuwani Sengani, Dhiren Allopi
Summary: Limit equilibrium methods often present significant errors in predicting the stability of homogenous slopes, a study has developed an accuracy classification chart using upper and lower bounds solutions.
Article
Environmental Sciences
Yixiang Sun, Yalong Yang, Bei Zhang, Xing Zhang, Yangyang Xu, Youzhen Xiang, Junying Chen
Summary: Water repellency has a significant impact on soil water infiltration, but there is currently no suitable correlation model for water-repellent soils. To address this, the modified Green-Ampt model was validated, incorporating assumptions about the thickness of saturated and unsaturated zones and combining formulas for the suction head with the average saturated hydraulic conductivity. Three modified models (Green-Ampt-VG, Green-Ampt-BC, Green-Ampt-GP) were developed. Indoor water infiltration experiments were conducted to compare the performance of the models in simulating different treatments. The results showed that the modified Green-Ampt-VG model had the best simulation effect, closely matching the measured values with low root mean square error (RMSE) for infiltration rate and wetting front distance. These findings provide valuable insights for understanding water infiltration in water-repellent soils through the suction head values obtained from the VG model.
Article
Environmental Sciences
Zhuo Cheng, Jun Zhang, Bofu Yu, Nick A. Chappell, H. J. (Ilja) van Meerveld, L. Adrian Bruijnzeel
Summary: Predicting catchment stormflow responses after tropical deforestation remains difficult. The Spatially Variable Infiltration (SVI) model performs better than the Green-Ampt (GA) model in simulating observed streamflow responses to rainfall. The parameters of the SVI model are related to the moisture content in the top 10 cm of the soil prior to the rainfall event.
WATER RESOURCES RESEARCH
(2023)
Article
Soil Science
Hana Beitlerova, Jonas Lenz, Jan Devaty, Martin Mistr, Jiri Kapicka, Arno Buchholz, Ilona Gerndtova, Anne Routschek
Summary: This study uses a comprehensive database of rainfall simulation experiments, state-of-the-art model parametrisation method, and linear mixed-effect models to analyze the relationship between soil and vegetation conditions and the model calibration parameter skinfactor. New empirically based transfer functions significantly improve the accuracy of the infiltration module in the EROSION-2D/3D model. Soil moisture and bulk density were found to be the most significant predictors of skinfactor variability, leading to a substantial improvement in prediction accuracy compared to the current method.
Article
Computer Science, Interdisciplinary Applications
Hongzhi Cui, Jian Ji, Jian Song, Wengui Huang
Summary: This study presents a series of improved stability charts based on limit equilibrium pseudo-static analysis of a wide range of homogeneous slope models. The developed charts provide solutions for estimating the factor of safety with good performance.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Civil
Shaohong Li, Peng Cui, Ping Cheng, Lizhou Wu
Summary: This study proposes a modified GA model that takes into account the effects of roots and moisture redistribution on slope stability. The results show that increasing rainfall intensity and slope angle lead to a decrease in the wetting front depth and the safety factor of the slope. The shape of vegetation roots has a significant effect on reinforcing shallow soils.
WATER RESOURCES MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Mehmet Salih Keskin, Sedat Kezer
Summary: The stability of slopes in MSW landfills is a significant issue in landfill design. This study investigates the effects of using geogrid reinforcement on slope stability. The results show that geogrid materials can greatly enhance the stability of landfill slopes, allowing for greater storage capacity and economic benefits.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Angel del Vigo, Sergio Zubelzu, Luis Juana
Summary: This paper presents a set of physically based expressions for estimating infiltrated volume and flow rate from different sources, offering accurate estimation compared to Richards equation simulations. Dimensionless expressions were also derived to draw general conclusions on infiltration processes, and a simple procedure for soils characterization was proposed using a small number of parameters.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Geological
Terence Ma, Brigid Cami, Sina Javankhoshdel, Brent Corkum, Nicolas Chan, Amir H. Gandomi
Summary: A novel method is introduced to search for the critical slip surface in a 3D slope by transforming spline surfaces. The proposed method assumes the slip surface to be a nonuniform rational basis spline (NURBS) surface and involves varying the parameters and using a metaheuristic search algorithm. A major advantage of this method is the ability to locally optimize the final spline surface using surface altering optimization methods.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Multidisciplinary Sciences
Peng Xia, Chunye Ying
Summary: This research proposes an accurate evaluation method for anchored slope stability, utilizing group decision theory, analytic hierarchy process, matter element analysis theory, and inverse hierarchical calculations. The method effectively integrates multiple factors, avoids subjective errors, and provides intuitive evaluation results. The reliability of expert scoring is quantitatively evaluated, improving efficiency and reflecting distances between stability grades.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Environmental
Gengqian Nian, Zhonghui Chen, Lingfei Zhang, Min Bao, Zihan Zhou
Summary: A numerical method combining the numerical solutions of rainfall infiltration with the upper-bound theorem of the limit analysis kinematic method is proposed to investigate the 3D stability of a slope under variable rainfall conditions. The safety factors and failure patterns of the slope are calculated and compared to verify the reliability of the method. The results show that increasing rainfall has the strongest effect on slope stability, and the 3D stability analysis is more practically important than the 2D plane strain analysis.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Behailu G. Habtemariam, Kelifa B. Shirago, Democracy D. Dirate
Summary: The study revealed that the stability of cut slopes is significantly influenced by steep slope angles, a high proportion of fine soil, and moisture content. Soil with less fine-grained fractions contributes to a more stable slope, while flattening the slope helps stabilize cut slopes.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Guangyu Dai, Fei Zhang, Yuke Wang
Summary: This study presents stability analyses of layered soil slopes in unsaturated conditions and determines the factor of safety involving suction stress of unsaturated soil using a limit equilibrium method. The obtained results show that larger suction stress provided in unsaturated clay dominates the stability of the layered slopes, while the location and thickness of the clay layer have significant influences on slope stability.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(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)