Article
Agronomy
Aram Ali, John McL Bennett, Andrew A. J. Biggs, Alla Marchuk, Afshin Ghahramani
Summary: This study evaluated the effects of alkaline irrigation water on soil properties using long leaching columns in different water qualities. The results showed that increased solution alkalinity led to higher pH, alkalinity, and sodicity in the soil profile, particularly for the soil surface and acidic soils. The HYDRUS-1D model was able to simulate these effects and the associated reduction in hydraulic conductivity, with potential for further improvement by incorporating a non-linear approach for determining pH hydraulic reduction scaling factor.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Soil Science
Mitsuhiro Inoue, Hirotaka Saito, Haruyuki Fujimaki, Kosuke Noborio, Koji Inosako, Jiri Simunek
Summary: This paper presents a simple and inexpensive method called repeated falling-head (RFH) to determine field-saturated hydraulic conductivity (Kfs). The method uses a portable cylinder as a water supply tank through which water infiltrates into the soil. The falling-head test is repeated without complete drainage of the cylinder to eliminate the effects of initial soil moisture conditions. The study shows the reliability of the RFH method by comparing the Kfs values obtained using this method with those obtained using other established methods.
Article
Engineering, Civil
Xiyan Zhang, Dongqing Li, Lei Chen, Feng Ming, Yuhang Liu
Summary: This study proposed a simple and smooth hydraulic conductivity model for saturated frozen soil based on the soil freezing characteristic curve, which was validated with experimental cases and found that the predictive modeling power was related to the tortuosity function. The model showed better performance compared to previous models, providing a new idea for developing the hydraulic conductivity model of saturated frozen soil.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Antonin Nikodem, Radka Kodesova, Miroslav Fer, Ales Klement
Summary: Extensive agricultural use of land and intensive water erosion in geomorphologically diverse areas with uniform soil substrate can lead to high diversity in soil types and properties. This study aimed to propose a method to characterize the variability of soil hydraulic properties. The spatial and temporal variability of soil hydraulic properties varied among different soil types and was affected by sampling day and position.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Abhishek Goyal, Alessia Flammini, Renato Morbidelli, Corrado Corradini, Rao S. Govindaraju
Summary: The impact of observations on the maximum likelihood estimates (MLE) of the Ks distribution parameters is evaluated in this study. Based on data from rainfall-runoff events, the results demonstrate the role of temporal variation of rainfall in resolving the Ks field for a rainfall event.
JOURNAL OF HYDROLOGY
(2023)
Article
Thermodynamics
Lei Chen, Feng Ming, Xiyan Zhang, Xiaobin Wei, Yuhang Liu
Summary: This study presents an experimental and theoretical method for obtaining the hydraulic conductivity of warm saturated frozen soil, which can accurately predict the hydraulic conductivity through a proposed equivalent model. The validity of the model is confirmed by comparing predictions with measured data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Geosciences, Multidisciplinary
Edzard Hangen, Friedhelm Vieten, Uwe Geuss
Summary: This study utilized field data to estimate the field-saturated hydraulic conductivity of alluvial soils, developing a pedotransfer function to predict K-fs values for 11 different alluvial soils. While individual realizations showed deviation to measured values, the averaged linear regression provided acceptable accuracy.
Article
Environmental Studies
Agnieszka Petryk, Edyta Kruk, Marek Ryczek, Lenka Lackoova
Summary: Saturated hydraulic conductivity is a crucial soil parameter that affects surface runoff and water erosion formation. Field and laboratory methods for measuring this parameter are time-consuming and expensive, while empirical methods are simple, quick, and costless. This study compared 15 pedotransfer models to assess their usefulness in determining saturated hydraulic conductivity for highly eroded loess soil. The average values obtained from the analyzed functions ranged greatly between 2.00 center dot 10(-3) and 4.05 center dot 10(0) m center dot day(-1). The results were compared with each other and with values obtained from the field method. The Kazeny-Carman and Zauuerbrej methods showed the best comparability with the field method, while the Seelheim and Furnival-Wilson methods differed significantly.
Article
Energy & Fuels
M. Stylianou, C. F. Panagiotou, E. Andreou, F. Frixou, A. Christou, P. Papanastasiou
Summary: The laboratory analysis evaluated the impact of three different biochars on the physical properties of soil, with significant increases in hydraulic conductivity observed for biochars derived from spent coffee grounds and sludge. However, no changes were seen for biochar derived from manure. Additionally, the saturated water content increased with the addition of spent coffee grounds biochar, while trivial changes were observed for the other treatments.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Geosciences, Multidisciplinary
Hector Aguilera, Carolina Guardiola-Albert, Luis Moreno Merino, Carlos Baquedano, Elisabeth Diaz-Losada, Pedro Agustin Robledo Ardila, Juan Jose Duran Valsero
Summary: Mapping saturated hydraulic conductivity (K-s) is vital in various fields and a new methodology was developed for topsoil Ks mapping at the catchment scale using variable selection and machine learning techniques, resulting in a highly accurate prediction model for an area on the island of Mallorca, Spain.
Article
Forestry
Yinghu Zhang, Lu Wang, Wenqi Zhang, Zhenming Zhang, Mingxiang Zhang
Summary: In this study, the relationship between root systems, soil macropore networks, and soil hydraulic properties in forested wetland soils was investigated. The results showed that root systems and macropore networks have significant effects on soil hydraulic conductivity, and there are differences between areas with different vegetation densities.
Article
Soil Science
Kaihua Liao, Juan Feng, Xiaoming Lai, Qing Zhu
Summary: This study used a global meta-analysis method to investigate the influence of conversion from conventional tillage to conservation tillage on soil saturated hydraulic conductivity (K-sat). The results showed that factors like soil layer, conservation tillage type, soil texture type, and cropping system management did not significantly affect the influence of conversion to conservation tillage on K-sat. However, the conversion to conservation tillage significantly increased the surface and subsurface K-sat when measured by a rainfall simulator. The relationship between climatic and topographic factors and K-sat responses to tillage conversion was also explored.
Article
Water Resources
A. Flammini, R. Morbidelli, C. Corradini, J. Dari, C. Saltalippi, A. Goyal, R. S. Govindaraju
Summary: This study focuses on the spatial variability of saturated hydraulic conductivity (Ks) in the Hydrological Open Air Laboratory (HOAL) watershed in South-West Austria. A statistical approach is applied to Ks datasets to analyze uncertainties, and the uncertainties of different variables are derived for different observation numbers and areas. It is found that the uncertainty is almost constant when considering different sub-regions in the largest plot beyond a certain threshold area. Moreover, the uncertainty of arithmetic mean (K) over bar (sl) and coefficient of variation (CVal) is much smaller than that of geometric mean (K) over tilde (s) and associated coefficient of variation (CVg) for a given number of observations.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Soil Science
S. Jace Kaminski, Behzad Ghanbarian, Stacey Kulesza, Bo V. Iversen, Andres Patrignani
Summary: Understanding the effect of sample volume on soil properties is important for hydrogeology, soil physics, and environmental engineering. This study uses percolation theory to estimate the scale dependency of hydraulic conductivity in soils. The researchers applied classification methods and conducted experiments on soil samples from four Danish sites to determine the relationship between pore size distribution and hydraulic conductivity. The theoretical estimates aligned well with experimental measurements, showing that the theory provides accurate estimations in certain soil textures and classes.
Article
Geosciences, Multidisciplinary
Qiuyue Tang, Xiaoqian Duan, Ling He, Dalan Liao, Chongfa Cai, Yusong Deng
Summary: In this study, a developing Benggang in South China was selected to explore the spatial variability and driving factors of soil saturated hydraulic conductivity (Ks). The results showed that the properties of Benggang landforms varied with soil layer depth and slope position. Ks values exhibited notable multifractal characteristics and were affected by the number, area ratio, and mean volume of soil macropores.