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 11 of 11 for “"Frozen Soil"”.
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Measurement and Simulation of Preferential Flow in Frozen Soils
The infiltrability of frozen soils strongly influences the partitioning of snowmelt and hydrological functioning of cold regions. Preferential flow in macropores may enhance infiltration into frozen soil, but flow dynamics are complicated by coupled water and heat transfer processes. Field studies …
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Analysis of Historical Cooperative Observation Program (COOP) Climate Data Through Trend and Correlation Determination for Selected South Dakota Sites and Comparisons of COOP Sensors with the Automated Weather Data Network (AWDN) Remote Sensors
… locations in South Dakota. In the first study, frozen soil temperatures were studied for Cottonwood, SD. The timing of when soil was considered frozen and thawed each year was determined which is important for planning storage and application of manure. The results showed that there was a trend …
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An Investigation of the Origin and Nature of Contraction Fissures in the Vicinity of Grand Forks, North Dakota
… these contraction fissures that appear in the frozen soil in the winter months in North Dakota, and similar structures, ice wedges, that are present in the permafrost regions of the world.</p>
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Terrestrial Si dynamics in the Arctic: a study on biotic and abiotic controls
… (as amorphous Si) and subsequent storage in soil, has been realized. Due to the high prevalence of high Si-accumulating plants, cold temperatures and perenially frozen soil conditions, Arctic terrestrial ecosystems is hypothesized to store a significant fraction of the global soil ASi stock. …
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Earth electrode resistance diagnosis and measurements
… assessing the impact of temperature changes on soil resistivity.The methodology encompasses installing both copper and AX-PRO electrodes at the test sites, performing empirical measurements, conducting simulations using advanced software, and calculating expected resistance values based on …
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Biochar as a soil amendment to enhance petroleum hydrocarbon degradation in northern landfarms
… petroleum hydrocarbon (PHC) contaminated soils through conventional landfarming practices. Thus, cost-effective soil remediation strategies that are active under frozen conditions and specific to cold regions are in strong demand. Biochar amendments have been added to soil to sequester …
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Helical pile behavior in a silty soil at varying thermal and hydraulic conditions
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Evolution of Preconsolidation Pressure of Normally Consolidated Clays Over Full Temperature Range
… over a wide range which includes both frozen and elevated temperatures. To do so, consolidation tests were run at various temperatures between -7 °C and 50 °C, and the yield stress at each consolidation temperature was determined. As previous studies have established that the …
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A Mesocosm Study of Bioretention Functionality Under Frozen Conditions
… how bioretention systems function under frozen conditions using 24 mesocosm cells in Okotoks, Alberta. The mesocosm cells were lined and had three types of media, three types of vegetation, and two different impervious to pervious ratios. Media types included two typical bioretention …
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Improving The Palmer Drought Severity Index By Incorporating Snow And Frozen Ground
… all the model variables (evapotranspiration, soil moisture recharge/loss, surface runoff) decreased in winter and increased in spring melt time and soil moisture remained the same in winter and got recharged in spring, the difference between the soil moisture in the original PDSI model without …
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Simulations and projections of major air pollutants over the United States and uncertainty analyses, effects of natural change and human activities
… improvements include the parameterizations of frozen soil effect and snow cover effect on dust emission. The module is tested in reproducing the present dust pollution, through the comparison with available observations. Then, the surface PM concentration under the 2050 climate is projected to …