Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"moisture dynamics"”.
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Dielectometry measurements of moisture dynamics in oil-impregnated pressboard
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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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
… NAPL and water loading histories (i.e., soil moisture dynamics). A 2-D vertical cross-section with layered heterogeneity mimicking the Hanford Site was assumed. In cases of co-disposal of NAPL with large volumes of wastewater, the form and location of NAPL were most strongly influenced by high …
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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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Energy efficiency improvements in traditional buildings: exploring the role of user behaviour in the hygrothermal performance of solid walls.
… future damage to the fabric or occupants health. Moisture dynamics in building envelopes are affected by the enclosures geometry, materials properties and external and internal boundary conditions. Since the internal boundary is heavily influenced by users, understanding their behaviour is …
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Estimation of land surface water and energy balance flux components and closure relation using conditional sampling
… balance include numerical treatment of heat and moisture diffusion in the soil-vegetation-atmosphere continuum. These two diffusion and exchange processes are linked only at a few critical points. The performance and sensitivity of models are highly dependent on the nature of these linkages that …
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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 nature of pan sediments: A case study on dust supply from the Makgadikgadi pans, Botswana
… to diurnal, seasonal and inter-annual controls, moisture dynamics and crust conditions with anthropogenic stresses also being evident. This study has interpreted the driving mechanisms and limitations associated with both the micro and macro scale of dust entrainment, advancing the current …
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
… our ability to predict the magnitude and spatial dynamics of N2O fluxes. Soil moisture can be considered a key driver because it influences oxygen supply, which feeds back on N2O sources (nitrification versus denitrification) and sinks (reduction to dinitrogen). Soil volumetric water content is …
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The influence of the Critical Zone on hillslope hydrology and stability
… to reproduce observed pore-water pressures, soil-moisture dynamics, and subsurface flow mechanisms. The findings enhanced our understanding of rainfall-induced slope instability and provided further insights into the redistribution of water in layered volcanic deposits. The work expands by using a …
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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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