Article
Soil Science
Awedat Musbah Awedat, Yingcan Zhu, John McLean Bennett, Steven R. Raine
Summary: This study investigated the effect of different sodium adsorption ratio (SAR) solutions on soil porosity, pore size, and saturated hydraulic conductivity (Ksat), showing that distilled water application can reduce Ksat, especially for soils initially treated with sodic water. The use of distilled water significantly decreased the proportion of macro and mesopores, while increasing the proportion of micropores, particularly for soil columns initially treated with high SAR solutions.
Article
Green & Sustainable Science & Technology
Muawia Dafalla
Summary: This study investigated the effects of saline water, specific chemicals, cement, and bentonite on sand-clay liners. It was found that adding bentonite grout improved hydraulic conductivity, while cement had a significant effect on compressibility. These findings can guide the design and assessment of sand-clay liners in semi-arid regions and coastal zones.
Article
Environmental Sciences
Yijie Wang, Liming Hu, Shengmin Luo, Ning Lu
Summary: This study investigates the relationship between soil-water retention curve (SWRC) and soil-water isotherm (SWI) and proposes a closed-form SWI model that can accurately fit adsorption and desorption isotherms for different types of soils. The proposed model demonstrates the ability to distinguish between different soil-water retention processes and has been experimentally validated for its wide applicability and effectiveness.
VADOSE ZONE JOURNAL
(2022)
Article
Engineering, Environmental
C. M. Aswathy, B. M. Sunil
Summary: This study evaluated the effect of inorganic contaminants on the behavior of bentonite-based landfill liner material at different blending ratios. Results showed a decrease in hydraulic conductivity, a slight reduction in unconfined compressive strength under wet conditions, and good adsorption characteristics of the blended lithomargic clay with bentonite.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Mehmet Sukru Ozcoban, Seren Acarer, Nese Tufekci
Summary: This article examined the change in hydraulic conductivity of landfill liners caused by contaminants in leachate and the mechanisms responsible for this change. It identified deficiencies in the literature on this topic and presented directions for future studies.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Geological
Yong-Min Kim, Tae-Hyuk Kwon
Summary: The use of bacterial biofilms and EPS for engineered bioclogging in geotechnical practices has gained attention, with the addition of fine clay particles enhancing the durability of biofilm-induced bioclogging. Experiments showed that biofilm associated with bentonite particles demonstrated improved resistance against fluid flows compared to biofilms alone, suggesting the potential of bentonite-biofilm aggregations in enhancing bioclogging durability in nutrient-poor conditions.
Article
Multidisciplinary Sciences
Wei Luo, Bo Xiang, Enlong Liu, Haisong Zhao, Kai Wu, Yunyong He
Summary: A series of tests were conducted to study the mechanical characteristics of soil in seasonally frozen condition, considering the effects of freeze-thaw cycles and root systems. The results showed that strain softening and volumetric dilatancy occurred under lower confining pressure, while strain hardening and volumetric contraction occurred under higher confining pressure. The bearing capacity of the samples decreased with increasing freeze-thaw cycles, but increased with increasing volume ratio of roots.
SCIENTIFIC REPORTS
(2023)
Article
Geochemistry & Geophysics
Yanbin Gao, Jiadan Liu
Summary: The permeability and microstructure properties of clay can be changed by NAPL pollution, which has drawn high attention in the study of the interaction between NAPL and contaminated soil. This study investigated the variation of pollutants in clay with depth and the changes in plasticity, permeability, and microstructure properties of clay samples contaminated by specific NAPLs. The results showed that the microstructure characteristics of clay changed under the influence of NAPL content, with an increase in porosity and permeability. The study also found that clay maintained stability and resistance to cracking even under TCE pollution.
Article
Engineering, Geological
Juan Hou, Rui Sun, Craig H. Benson
Summary: A hydrodynamic model was used to simulate the flow in an idealized geosynthetic clay liner (GCL) containing bentonite, and the results suggest that the hydraulic conductivity of GCLs decreases as the bentonite granules hydrate and swell, forming smaller intergranular flow paths. The model also indicates that greater granule swelling is required to achieve low hydraulic conductivity when the bentonite is comprised of larger granules or has a lower density. Furthermore, the model predicts that intergranular pores become extremely small as the hydraulic conductivity approaches 10-11 m/s.
GEOTEXTILES AND GEOMEMBRANES
(2023)
Article
Engineering, Geological
C. Di Maio, J. De Rosa, R. Vassallo
Summary: This paper investigates the influence of rainfall on deep landslides by long-term monitoring of pore water pressures and field permeability tests. The results show that pore water pressures along the slip zone respond more to rain, highlighting the importance of considering different hydraulic conductivities in different subsoil zones for evaluating landslide safety factors.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Civil
Ziheng Wang, Majid Sedighi, Amanda R. Lea-Langton, Masoud Babaei
Summary: Interest in using biochar in environmental engineering applications has increased due to its effectiveness in water and wastewater treatment, carbon dioxide sequestration, hazardous gas containment, and microplastic filtration. This study investigates the impact of biochar microstructure on the hydraulic conductivity of sand-biochar mixtures and introduces a dual-porosity concept to improve the accuracy of existing models. Experimental tests were conducted on sand-biochar mixtures with varying biochar content, and the results showed that considering biochar's intraparticle porosity significantly improves the prediction accuracy of hydraulic conductivity.
JOURNAL OF HYDROLOGY
(2022)
Article
Green & Sustainable Science & Technology
Ahmed M. Al-Mahbashi, Muawia Dafalla, Abdullah Shaker, Mosleh A. Al-Shamrani
Summary: The study reveals that clay sand mixtures undergo complex expansion and shrinkage during wetting and drying processes, impacting hydraulic conductivity. Results show that hydraulic conductivity initially increases and fluctuates before decreasing, with continuous monitoring demonstrating a gradual reduction over time.
Article
Engineering, Environmental
Hailin Wang, Hong Sun, Zhaoxing Huang, Xiurun Ge
Summary: Soil hydraulic conductivity is influenced by consolidation stress, dry density, and natural soil structure. Consolidation stress affects the area percentage of macropores, while an increase in dry density leads to pore filling and decreased connectivity. The area percentage of macropores reflects changes in soil microstructure, and a stable intrinsic structure helps to restrain the decrease in hydraulic conductivity.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Ahmed M. Al-Mahbashi, Muawia Dafalla
Summary: Sand-expansive clay liners are widely used in geoenvironmental and geotechnical projects as hydraulic barriers. This study found that flow and mass variations significantly impact the hydraulic conductivity of the liners and suggest using flooding or standing water for long-term performance assurance.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2021)
Article
Engineering, Civil
Pei-Ning Li, Ye-Shuang Xu, Xu-Wei Wang
Summary: This study proposes a new modified K-C equation considering the derivation principle of the original K-C equation. By applying Poiseuille's law in porous media, the concept of 2D porosity (epsilon) and a correction coefficient for permeation (f) are presented. The parameters in the new modified K-C equation include specific surface area (S-0), tortuosity (1/cos theta), and ne. The prediction formulas for S-0 and 1/cos theta are deduced and verified by comparing them with established formulas and experimental data. The new modified K-C equation is adequate for predicting hydraulic conductivity for clay and sand by comparing it with experimental values and other established modified K-C equations.
JOURNAL OF HYDROLOGY
(2023)
Article
Agronomy
Hiz Jamali, Wendy C. Quayle, Jeffrey Baldock
AGRICULTURAL AND FOREST METEOROLOGY
(2015)
Article
Agronomy
Hiz Jamali, Wendy Quayle, Clemens Scheer, David Rowlings, Jeff Baldock
AGRICULTURAL AND FOREST METEOROLOGY
(2016)
Article
Soil Science
Hizbullah Jamali, Wendy Quayle, Clemens Scheer, Jeff Baldock
Article
Environmental Sciences
E. W. Christen, W. C. Quayle, M. A. Marcoux, M. Arienzo, N. S. Jayawardane
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2010)
Article
Engineering, Environmental
Michele Arienzo, Evan W. Christen, Wendy C. Quayle
JOURNAL OF HAZARDOUS MATERIALS
(2009)
Review
Engineering, Environmental
M. Arienzo, E. W. Christen, W. Quayle, A. Kumar
JOURNAL OF HAZARDOUS MATERIALS
(2009)
Article
Soil Science
N. S. Jayawardane, E. W. Christen, M. Arienzo, W. C. Quayle
Article
Environmental Sciences
Carlos Ballester, James Brinkhoff, Wendy C. Quayle, John Hornbuckle
Review
Environmental Sciences
Jackie R. Webb, Tim J. Clough, Wendy C. Quayle
Summary: The study examines the role of artificial water bodies as indirect sources of agricultural N2O emissions, highlighting their different responses to N loading and the issue of overestimation in the current IPCC EF model. It calls for more extensive research on N processing in artificial waters and the inclusion of these systems in global N2O budgets.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Agronomy
Carlos Ballester, John Hornbuckle, James Brinkhoff, Wendy C. Quayle
Summary: Practical solutions to optimise nitrogen use efficiency in modern surface irrigated cotton systems in Australia include adjusting the frequency of irrigation water and reducing nitrogen application rates. A two-year study showed that maintaining a suitable water deficit range during irrigation can increase yield and maintain fiber quality.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Agronomy
Carlos Ballester, John Hornbuckle, Thavone Inthavong, Vanndy Lim, Jeffrey McCormick, Anika Molesworth, Chantha Oeurng, Wendy Quayle, Vang Seng, Pheng Sengxua, Vorachith Sihathep, Veasna Touch, Camilla Vote, Philip Eberbach
Summary: Improving water availability for peanuts can be achieved by narrowing beds, while higher yields and water productivity can be achieved with sprinkler irrigation for maize. Organic amendments, especially those combining biochar and cow manure, have a positive impact on maize production, but not on peanut production.
Article
Agronomy
Rakesh Awale, John W. Hornbuckle, Wendy C. Quayle
Summary: Abundant poultry litter (PL) could be a viable alternative P nutrition source for irrigated cotton in the Riverina, NSW, Australia. The study showed that PL applications did not significantly affect crop P uptake, P use efficiency, and lint yield compared to mono-ammonium phosphate (MAP) fertilizer. Soil P availability remained high during the crop-growing season, and there were changes in P fractions over time with PL treatments. The 15 Mg PL ha(-1) treatment improved soil conditions and could substitute for commercial MAP fertilizer for P maintenance in high-yielding cotton.
Article
Soil Science
Jackie R. Webb, Rakesh Awale, Wendy C. Quayle
Summary: Limited research has been done on the impact of poultry litter on urea-nitrogen recovery in irrigated cropping systems. This study found that poultry litter had multiple benefits on soil and plant nitrogen, but did not significantly improve fertilizer uptake and recovery. The use of poultry litter increased total nitrogen recovery and plant uptake compared to urea-only treatments. However, most of the nitrogen in the crop came from soil and litter reserves, rather than current-season urea.
NUTRIENT CYCLING IN AGROECOSYSTEMS
(2023)
Article
Agronomy
Carlos Ballester, Camilla Vote, John Hornbuckle, Thavone Inthavong, Vanndy Lim, Chantha Oeurng, Wendy Quayle, Vang Seng, Pheng Sengxua, Vorachith Sihathep, Veasna Touch, Philip Eberbach
