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Artikel Jurnal
The role of hydropedology when aiming for the United Nations Sustainable Development Goals
Abstract Soil physics defines soil water, air, and temperature regimes that are crucial for agricultural production, the quality of water resources, and waste management. Positioning such activities in the context of the United Nations Sustainable Development Goals (SDGs) will provide a valuable…
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Artikel Jurnal
Disentangling slope‐scale spatial variability of saturated hydraulic conductivity in the black soil region of northeast China using noise‐assisted multivariate empirical mode decomposition
Abstract Reliable estimates of saturated hydraulic conductivity (Ks) are usually difficult to obtain, as Ks is regulated by a variety of soil processes acting at different spatial scales that may obscure each other's impacts. We hypothesized that these scale‐specific relationships could be well…
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Artikel Jurnal
The osmotic potential of soil solutions in salt tolerance studies: Following M. Th. van Genuchten's innovation
Abstract The osmotic potential in soil solutions decreases as salinity increases, and plants cannot take up enough soil water. Therefore, the osmotic potential of soil solutions can serve as an important metric of plant growth conditions in regions affected by soil salinization. Measurements of…
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Artikel Jurnal
Averaging or adding domain conductivities to calculate the unsaturated soil hydraulic conductivity
Abstract Recent models of the unsaturated hydraulic conductivity curve (UHCC) are the sum of separate UHCCs for domains of capillary water, film water, and water vapor. This requires parallel, noninteracting domains. A theoretical framework for aggregating domain conductivities to a bulk soil UHCC…
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Artikel Jurnal
Measuring and modeling soil moisture and runoff at solar farms using a disconnected impervious surface approach
Abstract Ground‐mounted photovoltaic sites are often treated as impervious surfaces in stormwater permits. This ignores the pervious soils beneath and between solar arrays and leads to an overestimation of runoff. Our objective was to improve solar farm stormwater hydrology models by explicitly…
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Artikel Jurnal
The nature and extent of bomb tritium remaining in deep vadose zone: A synthesis and prognosis
Abstract Tritium present in deep vadose zones is a useful tracer for estimating groundwater recharge, but its full utility is constrained by not knowing where and for how long the tritium tracing method remains applicable. We obtained 44 tritium profiles from 17 globally distributed sites with…
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Artikel Jurnal
Within‐field soil moisture variability and time‐invariant spatial structures of agricultural fields in the US Midwest
Abstract Understanding soil moisture variability and estimating high‐resolution soil moisture at subfield to field scales is critical for agricultural research and applications. However, systematic investigation of subfield scale soil moisture variability over cropland is still lacking from both…
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Artikel Jurnal
Calculating a minimum overlap period for successful intercalibration of soil moisture sensors
Abstract Long‐term in situ soil moisture monitoring inevitably requires sensors to be replaced. Ensuing discontinuities in the data record can be mitigated by intercalibration, however it is unclear how long the existing sensor needs to remain alongside the newly installed before there is enough…
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Artikel Jurnal
Developments and applications of the HYDRUS computer software packages since 2016
Abstract The HYDRUS codes have become standard tools for addressing many soil, agricultural, environmental, and hydrological problems requiring the evaluation of various subsurface physical, chemical, and biological processes. There are now many thousands of HYDRUS users worldwide, with thousands…
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Artikel Jurnal
Modeling water flow and volumetric water content in a degraded peat comparing unimodal with bimodal porosity and flux with pressure head boundary condition
Abstract Degraded peatlands release large amounts of greenhouse gases. The development of effective mitigation and management measures requires an understanding of relevant site‐specific biogeochemical and hydraulic processes. However, the simulation of water fluxes and vadose zone state variables…
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Artikel Jurnal
Downscaling SMAP soil moisture product in cold and arid region: Incorporating NDSI and BSI into the random forest algorithm
Abstract Soil moisture (SM) is a critical element of the hydrological cycle, land surface processes, and surface energy balance. However, the low spatial resolution of commonly used SM products limits the application of SM in agriculture and eco‐hydrology in cold and arid regions. In this study…
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Artikel Jurnal
Unsaturated hydraulic property measurements of subtropical anthropogenic (purple) soils in China
Abstract Many anthropogenic soils, often referred to as red bed or purple soils, are distributed in various areas of southern China. Purple soils typically are highly weathered and often lead to natural and engineering hazards because of their relatively poor water retention properties. Knowledge…
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Artikel Jurnal
Vadose zone perspectives in global arsenic research: A review and future opportunities
Abstract Few contaminants have been linked to more devastating human health and environmental impacts than carcinogenic arsenic (As). Geogenic As contamination of groundwater used as a drinking water source continues to threaten hundreds of millions of lives worldwide, with the As crisis in South…
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Artikel Jurnal
Neutron imaging of exchange flow between biopore and matrix for Bt versus C horizons
Abstract The surface coating of biopores plays a pivotal role in mediating mass exchange between the biopore and the soil matrix, ultimately governing preferential flow in structured soils. However, quantitative experiments of the flow exchange dynamics in the soil around an earthworm burrow…
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Artikel Jurnal
The time validity of Philip's two‐term infiltration equation: An elusive theoretical quantity?
Abstract The two‐term infiltration equation I(t)=St+At is commonly used to determine the sorptivity, S (LT−1/2), and product, A=cKs (LT−1), of the dimensionless multiple c and saturated soil hydraulic conductivity Ks (LT−1) from cumulative vertical infiltration measurements I∼1,…,I∼n (L) at times…
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Artikel Jurnal
On the accuracy of saturation estimation from electrical measurements of soils with high swelling clay content
Abstract Electrical conductivity models have been widely used to estimate water content and petrophysical properties of soils in hydrogeophysical studies. However, these models are typically only valid for soils with non‐expandable matrices because they were originally developed for clean sandstone…
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Artikel Jurnal
Implementation of the Brunswick model system into the Hydrus software suite
Abstract The Brunswick modular framework for modeling unsaturated soil hydraulic properties (SHP) over the full moisture range was implemented in the Hydrus suite. Users can now additionally choose between four different variants of the Brunswick model: (i) van Genuchten–Mualem (VGM), (ii)…
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Artikel Jurnal
Pore unit cell network modeling of the thermal conductivity dynamics in unsaturated sandy soils: Unveiling the role of spanning‐wetting phase cluster
Abstract As the world struggles with climate change and energy crises, understanding the role of soil in the food–water–energy nexus becomes increasingly critical. Accurately estimating the soil thermal conductivity drying curve is essential for assessing the impacts of temperature on soil biota…
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Artikel Jurnal
Effects of dynamic capillarity on the shear strength of sandy soils during transient two‐phase flow: Insights from non‐equilibrium triaxial simulations
Abstract Modeling two‐phase flow in unsaturated porous media is not only important to vadose zone hydrology but also of great value in diverse disciplines. Common approaches use a simplified relationship between fluid pressure difference and saturation, neglecting the influence of saturation change…
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Artikel Jurnal
Algebraic expressions for convective solute transport in a homogeneous soil below a surface barrier
Abstract Engineered surface barriers are expected to be used to cover sites containing buried waste radionuclides after site closure. Understanding the transport of contaminants in the soil below a surface barrier is of importance in order to protect the underlying groundwater. The travel velocity…