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 90 for “"soil parameters"”.
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Influence of soil parameters on the motion of rocking walls
… damping ratio also assumes both the block as the soil to be rigid. The validity of the latter can be questioned. This thesis will research the influence of the flexibility of the soil on the motion of a rocking wall. The influence of the shear wave velocity and the Poisson ratio will be …
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The determination of soil parameters for design from stress path tests
… elastic deformation properties of an anisotropic soil within the context of critical state soil mechanics. The soil tested is a heavily overconsolidated Gault Clay. Laboratory triaxial testing on 38 mm samples is used to measure and soil 100 mm diameter stiffness. A microcomputer-based control …
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Habitat models for plant functional groups with respect to soil parameters and management
… plant species were recorded along with abiotic parameters such as soil and climatic factors and management strategy on variously utilised investigation plots. For selected species biological traits were recorded. On their basis species were grouped into biological types. With the aid of stepwise …
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The effect of soil parameters on the bioavailability and retention of lead in rats
This study investigated the relationship between soil cation exchange capacity (CEC) and soil amendments (lime and phosphate) to the retention of lead in soil fed to rats. This study also related the amount of lead that can be extracted from in situ contaminated soils from a secondary smelter site …
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Trees in Urban Environments: How Soil Quality Impacts Tree Performance
… change and population growth. However, urban soil conditions can be unfavorable for tree growth. Street trees are widely known to suffer from poor soil quality, but there has been no comprehensive review of this topic so far. Clean soils can be transported from nonurban areas to support …
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Factors controlling microbial biomass in soils of Mt. Kilimanjaro
… contents of organic matter and microorganisms in soils are sensitive parameters to evaluate soil quality. In general, high contents in organic and microbial carbon (Corg, Cmic) are related to high soil fertility. Especially in the tropics, climate and land use have strong direct effects on basic …
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Ensaios de piezocone em um depósito de argila mole da cidade do Recife
… tests have shown a good agreement for many soil parameters.
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Supervised learning for back analysis of excavations in the observational method
… providing a systematic procedure to assess soil parameters based on monitoring data and prediction of the ground response. A probabilistic model is developed in this research to account for the uncertainties in the problem. Sequential Bayesian inference is used to update the soil parameters …
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Design verification of a diaphragm wall with steel piles
… design was based on analysis performed on a soil-structure interaction program using soil parameters calibrated in a previous study. Original and "as-built" design models were compared to measured results of the constructed structure. A second study was conducted to identify the sensitivity …
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Effect of rotation, organic inputs and tillage on crop performance and soil quality in conventional and low-input rotations in central Iowa
… input (LEI) cropping systems to crops and soils are well recognized the specific links between cropping practices and associated soil quality and crop responses are not yet clear. In the Marsden plots in central Iowa, crop yields and input use efficiency have been increased by the use of …
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Adapting The Modified Cam Clay Constitutive Model To The Computational Analysis Of Dense Granular Soils
… to research the permeability effect in sandy soils compacted up to 95% of maximum unit weight at the optimum moisture content. Each soil sample was tested using different stress paths. In addition, these data were also used to obtain the soil parameters. These soil parameters are used as input …
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The factors affecting the recovery of bloodstain evidence from buried clothing.
… of literature that focuses on determining what soil parameters impact the survival of buried bloodstain evidence. Several experiments were carried out to visually identify if bloodstain evidence is lost on clothing samples that are buried within and placed on the surface of the soil, and to …
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Assessing the vegetation and soil shear tester (VASST) as a tool to measure vegetated soil shear strength
… a range of land management regimes utilizing soil, vegetation, and climatic data. In general, OPAL’s intended purpose is to help land managers optimize training land carrying capacity. As part of OPAL, the Vegetation And Soil Shear Tester (VASST) was developed as a new method of in-situ …
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Analysis of the pressuremeter test by FEM formulation of the elasto-plastic consolidation
… for evaluating in-situ stress-strain behavior of soils, its use is limited. In large part, this is due to the fact that there are important unanswered questions about the SBPM test. One of the major issues concerns the influence of drainage in the soil as it is sheared. In clays, the test is …
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Determining parameters for stiff clays and residual soils using the self-boring pressuremeter
As testing stiff soils in the laboratory often leads to information which is not consistent with field performance, research was undertaken to determine in situ the soil properties. Among the devices which generated interest is the self-boring pressuremeter (SBPM). In this research, two stiff soils …
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Bacterial communities in glacier forefields of the Larsemann Hills, East Antarctica : structure, development & adaptation
… habitats and new terrain is becoming exposed to soil formation and accessible for microbial colonisation. This study aims to understand the structure and development of glacier forefield bacterial communities, especially how soil parameters impact the microorganisms and how those are adapted to …
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Aspectos geotécnicos da construção do aterro do projeto Rio - Setor Pinheiros
… interpreted in the sense of defining fundamental soil parameters to be used in the studying of enbankment behaviour. It was used, as usual, the Terzaghi’s Theory of Consolidation to study the settlements.
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Assessment of SWAT to Enable Development of Watershed Management Plans for Agricultural Dominated Systems under Data-Poor Conditions
… of the SWAT model's outputs due to input parameters, specifically soils and high resolution digital elevation models, which are likely to be lacking in data-poor environments, was quantified using Monte Carlo simulation. Two sources of soil parameter values (SSURGO and STATSGO) were …
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Análise de fundações de máquinas sujeitas a excitações verticais
… as function of frequence. In the analyses the soil was considered either as an elastic half space or as a set of linear springs. In order to achieve the research purpose, test results carried out on silty clay soil from Vicksburg (WES) (USA), sandy soils of Eglin (USA) and silty sand from Volta …
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Soil parameter retrieval under vegetation cover using SAR polarimetry
Soil conditions under vegetation cover and their spatial and temporal variations from point to catchment scale are crucial for understanding hydrological processes within the vadose zone, for managing irrigation and consequently maximizing yield by precision farming. Soil moisture and soil …
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