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Showing 1 to 18 of 18 for “"Soil moisture dynamics"”.
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Soil moisture dynamics from satellite observations, land surface modeling, and field data
<p>Knowledge of soil moisture variability is essential to understand hydrologic processes at a range of scales. In this study, spatio-temporal variability of soil moisture and inter-comparison among different soil moisture products were analyzed. The variability patterns were well characterized by …
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Soil moisture dynamics and soil moisture controlled runoff processes at different spatial scales : from observation to modelling
Soil moisture is a key state variable that controls runoff formation, infiltration and partitioning of radiation into latent and sensible heat. However, the experimental characterisation of near surface soil moisture patterns and their controls on runoff formation remains a challenge. This subject …
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Soil Moisture Dynamics and Thresholds for Surface Energy Balance Regime Transitions: An Observational Analysis at a U.S. Grassland Site
Understanding how soil moisture declines following rainfall—when the soil progressively dries due to evaporation and plant uptake—is critical for assessing plant water stress, surface energy partitioning, and land–atmosphere interactions. These periods of moisture loss, commonly referred to as soil …
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Influence of Soil Moisture Dynamics on DNAPL Spill Zone Architecture and Its Impact on Mass Removal Mechanisms During Soil Vapor Extraction in Heterogeneous Porous Media
… of DNAPL saturation, water saturation, and soil permeability (i.e., spill zone architecture) determines the pore-scale processes that control soil vapor extraction (SVE). To test this hypothesis, a fully coupled multiphase flow and transport simulator, STOMP was chosen. STOMP was first used …
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The effect of resource dynamics on invasive annual and native perennial grasses in grasslands of the mid-north of South Australia / Tanja Lenz.
Investigates the effects of soil moisture dynamics on the growth and interactions between invasive annual grasses and native perennial grasses in the mid-north of South Australia. At most sites annual grass abundance was positively correlated with rainfall, soil moisture after rainfall and higher …
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The coupled development of terrain and vegetation : the case of semiarid grasslands
… semiarid landscapes organizes as a function of moisture availability, which is often mediated by the form of the land surface. Simultaneously the processes that shape the land surface are influenced by vegetation, mainly because vegetation reduces fluvial erosion. This thesis presents the study …
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Turning a problem into a solution: heterogeneities in soil hydrology
It is commonly recognized that soil moisture exhibits spatial heterogeneities occurring in a wide range of scales. These heterogeneities are caused by different factors ranging from soil structure at the plot scale to land use at the landscape scale. There is an urgent need for effi-cient …
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Three-Dimensional Volume Averaged Soil-Moisture Transport Model: A Scalable Scheme for Representing Subgrid Topographic Control in Land-Atmosphere Interactions
In this research, the 3-D Volume Averaged Soil-moisture Transport (VAST) formulation is derived from the Richards equation to incorporate the lateral flow and subgrid heterogeneity due to topography. A conjunctive surface-subsurface flow model at a large scale, a 1-D Diffusion Wave (DW) surface …
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Controls on the Spatial-temporal distribution of soil moisture under snow dominated conditions in a naturally vegetated, sub-alpine mountain catchment
Soil moisture processes in the top soil is a pivotal element in the terrestrial phase of the hydrologic cycle over a wide range of scales. At the plot scale, soil moisture exerts a strong control on runoff, evapotranspiration, and the transfer of water to deeper soil levels and aquifers. It affects …
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Controls on the Spatial-temporal distribution of soil moisture under snow dominated conditions in a naturally vegetated, sub-alpine mountain catchment
Soil moisture processes in the top soil is a pivotal element in the terrestrial phase of the hydrologic cycle over a wide range of scales. At the plot scale, soil moisture exerts a strong control on runoff, evapotranspiration, and the transfer of water to deeper soil levels and aquifers. It affects …
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High-resolution soil moisture mapping by a proximal ground penetrating radar: A numerical, laboratory and field evaluation
Soil moisture is an important state variable acting in many environmental, hydrologic and climatic processes. There is thus a pressing scientific demand for revealing the soil moisture dynamics in the biosphere at various temporal and spatial scales. Despite the huge development of remote sensing …
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Understanding the causes of streamflow changes in the Eurasian Arctic
… changes in forcings and/or internal hydrologic dynamics are potentially confounded by the construction and operation of large reservoirs on many of the region's major rivers. A combination of data analysis and macroscale hydrological modeling are used to explore the controls on observed changes …
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
Soils are a dominant source of nitrous oxide (N2O), a potent greenhouse gas. The complexity of drivers of N2O production and emissions has hindered our ability to predict the magnitude and spatial dynamics of N2O fluxes. Soil moisture can be considered a key driver because it influences oxygen …
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The influence of the Critical Zone on hillslope hydrology and stability
… mechanisms in the stratified pyroclastic soil-mantled slopes of the Campania region, Southern Italy. Field monitoring, laboratory infiltration experiments, and physically based hydrological modeling were combined to reproduce observed pore-water pressures, soil-moisture dynamics, and …
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Advancing Soil Moisture Mapping with Multi-Modal Drone Sensing and AI: Integrating GPR, Hyperspectral, and Thermal Imaging for Precision Agriculture
Accurate soil moisture estimation at different depths is essential for sustainable agriculture, helping improve irrigation efficiency, crop productivity, and water conservation. However, conventional monitoring methods often struggle to provide reliable, scalable, and non-invasive soil moisture …
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A unified framework of modeling transpiration responses to water stress in the US Midwest
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Data-Driven and Process-Based Modeling Approaches for Advancing Irrigation Water and Nitrogen Management in Humid Cropping Systems
… frequent shifts between too little and too much soil water. Since irrigation decisions depend on the current soil water status, this variability makes it harder to know the right timing and amount of irrigation. The same swings also influence how nitrogen moves through the soil. Climate change is …
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Coevolutionary dynamics under anthropogenic impact in intensively managed landscapes
… changes in the rate and magnitude of water, soil, and carbon fluxes, and hence causes uncertainties in flood prediction, soil fertility, and food security. Understanding the co-evolution of various linked processes of hydrology, geomorphology, and biogeochemistry makes it possible to address …