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 41 for “"VOLUMETRIC WATER CONTENT"”.
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REAL TIME MONITORING OF VOLUMETRIC WATER CONTENT IN RECLAIMED MINE WASTE USING CONE PENETRATION - TIME DOMAIN REFLECTOMETRY
… covers over mine waste are designed to store water as a means of controlling water balance in order to support re-vegetation and minimize the net percolation of water into mine waste. Measurement of stored volumes of water in reclamation material is a critical element in monitoring the …
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Development and implementation of a low-cost data acquisition system using single-board computers to measure volumetric water content
… the Raspberry Pi platform, to measure volumetric water content of soils or other porous media. We first investigated the different methods to condition and measure signal frequencies. Subsequently, we designed and fabricated a Hardware Attached on Top frequency counter add-on board for …
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Effects of Transplant Season and Container Size on Landscape Establishment of Kalmia latifolia L.
… tested the effect of container size on the water relations of pinebark substrate embedded in field soil. Two other experiments tested the effects of transplant season and container size on landscape establishment of nursery-produced mountain laurel. Experiment one compared volumetric water …
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Predicting surface water profiles in sand
… concrete, sinkholes, buried utilities, the groundwater table, seepage through dams and determining the thickness of pavements. All of the applications depend on knowing the velocity of the EM wave through the material of interest. The velocity of EM waves through a vacuum is equivalent to the …
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An Experimental Study on Soil Water Characteristics and Hydraulic Conductivity of Compacted Soils
… design has been widely recognized. Soil water characteristic curve (SWCC) and hydraulic conductivity function (HCF) are vital soil properties that govern engineering behavior of unsaturated soils. In this study, a transient water release and imbibitions method (TRIM) is used to measure …
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Assessment of Soil Properties and Vegetation in a Mounded Native Tallgrass Prairie with an Aquic and Udic Soil Moisture Regime in the Ozark Highlands Region of Northwest Arkansas
… Soil samples were collected in mid-April 2017, volumetric water content measurements were collected continuously from April 2017 – June 2018, and vegetation was sampled in June and August 2017 and in May and August 2018. Soil clay concentrations in the mound summits roughly doubled from 0-90 cm …
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Vegetation Succession and Environmental Relations at the Illisarvik Drained Lake Experiment, Western Arctic Coast, Canada
… characteristics in the basin indicated that volumetric water content and vegetation height were the primary factors controlling active-layer thickness and ground temperatures at Illisarvik. The vegetation height likely acts as a proxy for the insulating influence of the snow.
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Spring-Thaw Nitrous Oxide Emissions From Reed Canarygrass On Wet Marginal Soil In New York State
… using static chambers. Soil temperature, volumetric water content, and above-ground biomass were also observed, as were hourly air temperature and precipitation. Hot-moment analysis, non-parametric statistics and modeling results show that in the reed canarygrass, the topologically low …
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Remediation of Soil Hydrophobicity on a Coastal USGA Sand-Based Golf Green
… superintendents and managers, especially as water restrictions intensify. The purpose of this study was to evaluate the effectiveness of thirteen soil surfactants in eliminating LDS and in maximizing root zone soil moisture on a sand based USGA golf green located on the California Central …
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Expanding the Application of Spectral Reflectance Measurement in Turfgrass Systems
… under normal field growing conditions. Soil volumetric water content was successfully estimated using a water band index of creeping bentgrass canopy reflectance. The spectral reflectance of turfgrass treated with conventional synthetic pigments was characterized and found to erroneously …
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Biosolids as a source of soil conditioning and fertility for turfgrass
Wastewater treatment plants are shifting towards producing exceptional quality (EQ) biosolids to increase recycling rates to land, especially urban areas. Other methods of improving the environmental impact of wastewater treatment includes additions of iron (Fe) to reduce phosphorus (P) …
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New Technologies for Evaluating Putting Green Surface Characteristics
… green moisture levels are typically measured as volumetric water content (θ) using portable time domain reflectometry (TDR) meters; in this research a common TDR meter (FieldScout TDR300, Spectrum Technologies Inc.) was fit with spacer-blocks, so that new measurement depths closer to the putting …
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Correlation Analyses among Soil, Plant, and Environmental Variables and Greenhouse Gas Emissions from Furrow-irrigated Rice on a Silt-loam Soil
<p>Alternative water management practices for rice (Oryza sativa) production have been developed for water conservation purposes, such as the relatively new furrow-irrigated rice production system, which results in spatially variable volumetric water content (VWC), temperature, and …
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Establishment Method and Cultural Practice Effects on Sports Turf
… to potential problems associated with decreased water infiltration, gas exchange, rooting, and turfgrass quality caused by soil layering. Core-aerification and sand topdressing may help alleviate the problems associated with soil layering from the use of soil-based sod on sand-based rootzones. …
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An Evaluation of Borehole Hydraulic Conductivity Equations and Field Determined Soil Water Characteristic Curves
… two test pads were instrumented with volumetric water content and soil water matric potential sensors to facilitate the determination of field-obtained soil water characteristic curves (SWCCs) and hydraulic conductivity functions (k-functions) for unsaturated soils. For the …
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Soil and Site Characterization Using Electromagnetic Waves
… properties of a soil to its fines content, clay mineralogy, anisotropy, degree of flocculation and pore fluid chemistry; (2) Proposal of a practically applicable method to determine the volumetric water content, specific surface area and pore fluid salt concentration simultaneously …
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Impact of Management Practices on Cold Tolerance of Ultradwarf Bermudagrass Putting Greens
… lower surface disruption. Surface firmness and volumetric water content of UDB were impacted by construction method but were not significantly impacted by core aeration programs. Field research revealed that 'fall only' and 'fall and winter' TE applications improved UDB quality but only 'fall …
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EXTENSIVE GREEN ROOF SUBSTRATE COMPOSITION: EFFECTS OF PHYSICAL PROPERTIES ON MATRIC POTENTIAL, HYDRAULIC CONDUCTIVITY, PLANT GROWTH, AND STORMWATER RETENTION IN THE MID-ATLANTIC.
… (GR) systems have gained popularity as storm water management tools, more emphasis has been applied to studying performance aspects, including stormwater retention. Of particular importance is the substrate layer in which the vegetation grows, which contributes the majority of stormwater …
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Rapid Measurement and Estimation of Saturated Hydraulic Conductivity of Mineral Slurries
… of fine-grained slurries with higher initial water contents. However, the determination of this function can be very challenging and time-consuming, considering the long duration of the conventional tests and significant variation in hydraulic conductivity values with the wide range of void …
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Using Covers and Wetting Agents to Prevent Winter Injury of Ultradwarf Bermudagrass
… coverage through digital image analysis. Soil volumetric water content was monitored at a depth of 3.8 cm using time-domain reflectometry. The wetting agent trial included two water drop penetration tests during each season. In both seasons, reducing the cover temperature threshold resulted in …
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