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Rozprawy doktorskie na temat „Volumetric water content”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 24 lipca 2025

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1

Rasam, Setty Harish Raghav. "Assessment of Volumetric Water Content Using Radio Waves." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Volumetric water content evaluation in structures, substructures, soils, and subsurface in general is a crucial issue in a wide range of applications. The main weakness of subsurface moisture sensing techniques is usually related both to the lack of cost-effectiveness of measurements, and to unsuitable support scales with respect to the extension of the surface to be investigated. In this regard, Wireless Underground Sensor Network are increasingly used non-destructive tool specifically suited for characterization and measurement. It is undeniable that wireless communication technology has bec

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Bagour, Mohammed H., and Donald F. Post. "Predicting the Volumetric Water Content of Irrigated Arizona Soils at Different Soil Water Potentials." Arizona-Nevada Academy of Science, 2001. http://hdl.handle.net/10150/296584.

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Preko, Kwasi. "Determination of Volumetric Soil Water Content Using Ground Penetrating Radar Bestimmung des volumetrischen Bodenwassergehaltes mit dem Bodenradar /." [S.l. : s.n.], 2007. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000007396.

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Ali, Mohamad Idaly Bin. "Development and implementation of a low-cost data acquisition system using single-board computers to measure volumetric water content." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119312.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 73).<br>The work described in this thesis is aimed at exploring the use of single-board computers, specifically 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 th

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Cangialosi, Michael Vincent. "The Effect of Clay Content and Iron Oxyhydroxide Coatings on the Dielectric Properties of Quartz Sand." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42579.

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Dielectric constant is a physical property of soil that is often measured using non-invasive geophysical techniques in subsurface characterization studies. A proper understanding of dielectric responses allows investigators to make measurements that might otherwise require more invasive and/or destructive methods. Previous studies have suggested that dielectric models could be refined by accounting for the contributions of different types of mineral constituents that affect the ratio and properties of bound and bulk water. This study tested the hypothesis that the dielectric responses of po

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Masbruch, Karen, and Karen Masbruch. "A time domain transmission method for determining the dependence of the dielectric permittivity on volumetric water content: applications to municipal landfills." Thesis, The University of Arizona, 2002. http://hdl.handle.net/10150/626872.

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A method for determining the dependence of the dielectric permittivity of municipal refuse on its volumetric water content is developed and tested to monitor water contents throughout a municipal landfill. The method is based on time domain transmission (TDT) measurements collected with an automated network analyzer (ANA). Measurements in reference liquids, dry sand and spatially variably saturated sand were first made to test the method's ability to measure the apparent dielectric permittivity. The method was then extended to refuse samples collected from a closed 40 year old mu

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Bergsten, Steven J. "Certain Agave Species Exhibit the Capability to be Moderately Productive Under Conditions of High Salt and Drought Stress." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3818.

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Water availability and arable lands are increasingly limiting resources in many parts of the U.S., particularly in semi-arid and arid regions. As a means of addressing food and fuel demands associated with burgeoning population growth, highly productive and water-use efficient crops need to be identified. One potential crop, Agave, merits consideration and evaluation due to its putative capability to provide sustenance and energy despite growing in water-limited regions and on marginal soils. However, little is known regarding the productivity these succulent plants will have under growing con

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Roberson, Travis Leon. "Improving Soil Moisture Assessment of Turfgrass Systems Utilizing Field Radiometry." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/87391.

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The need for water conservation continues to increase as global freshwater resources dwindle. In response, many golf course superintendents are implementing new methods and tools to become more frugal with their water applications. For example, scheduling irrigation using time-domain reflectometer (TDR) soil moisture sensors can decrease water usage. Still, TDR measurements are time-consuming and only cover small scales, leading to many locations being unsampled. Remotely sensed data such as the normalized difference vegetation index (NDVI) offer the potential of estimating moisture stress acr

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Vismara, Edgar de Souza. "Mensuração da biomassa e construção de modelos para construção de equações de biomassa." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-18052009-155116/.

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O interesse pela quantificação da biomassa florestal vem crescendo muito nos últimos anos, sendo este crescimento relacionado diretamente ao potencial que as florestas tem em acumular carbono atmosférico na sua biomassa. A biomassa florestal pode ser acessada diretamente, por meio de inventário, ou através de modelos empíricos de predição. A construção de modelos de predição de biomassa envolve a mensuração das variáveis e o ajuste e seleção de modelos estatísticos. A partir de uma amostra destrutiva de de 200 indivíduos de dez essências florestais distintas advindos da região de Linhares, ES.

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Vláčilíková, Michaela. "Měření infiltrace v terénu pomocí MiniDiskového infiltrometru." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409739.

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The diploma thesis deals with measuring of infiltration by MiniDisk method and its evaluation, but also with analysis of intact and grab soil sample, by means of which it is possible to assess the soil quality. The measurements took place on 30.4.2019, 4.5.2019, 12.5.2019, 2.6.2019, 30.6.2019, 2.7.2019, 31.8.2019 and 21.9.2019 on grassland near the town of Luhačovice. Grab and intact soil samples were taken from the upper soil layer and processed in a pedological laboratory. The Zhang method was used to evaluate the infiltration results. The results of soil analyzes and infiltration were proce

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Jiang, Shuang. "Bacterial leaching from dairy shed effluent applied to a fine sandy loam under flood and spray irrigations." Lincoln University, 2008. http://hdl.handle.net/10182/668.

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Land application of wastes has become increasingly popular, to promote nutrient recycling and environmental protection, with soil functioning as a partial barrier between wastes and groundwater. Dairy shed effluent (DSE), may contain a wide variety of pathogenic micro-organisms, including bacteria (e.g. Salmonella paratyphyi, Escherichia coli. and Campylobacter), protozoa and viruses. Groundwater pathogen contamination resulting from land-applied DSE is drawing more attention with the intensified development of the dairy farm industry in New Zealand. The purpose of this research was to investi

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12

Fouché, Julien. "Effet du réchauffement climatique sur le fonctionnement biogéochimique de deux cryosols arctiques dans la région de Salluit, Nunavik, Canada." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4306.

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L'augmentation de la décomposition de la matière organique des cryosols arctiques sous l'effet du réchauffement et de la dégradation du pergélisol contribuerait à une rétroaction positive sur les changements climatiques. Nous étudions le fonctionnement biogéochimique de deux Cryosols: un cryosol histique (H) et un cryosol turbique (T), en conditions naturelles et réchauffés. Les profils ont été instrumentés à Salluit (Nunavik, Canada) et les mesures ont été faites pendant les étés 2010 et 2011. Le réchauffement augmente la respiration de l'écosystème (ER) de manière plus intense pour H que pou

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Mayeli, Nader. "An experimental study of the unrestrained shrinkage of isotropic paper sheets." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/an-experimental-study-of-the-unrestrained-shrinkage-of-isotropicpaper-sheets(6f0e3356-2e17-4433-8303-723a863c11f0).html.

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The influence of several hardwoods and softwoods pulp fibre on the free shrinkage of isotropic paper sheets was investigated. The effect of properties such as density, grammage, Fractional Contact Area (FCA), Water Retention Value (WRV), fines content and fibre morphology were also investigated on the free shrinkage of isotropic paper sheets. Further, the influence of Lyocell fibre and glycerol on the free shrinkage of isotropic paper sheets is reported. Experimental results showed that in general the free shrinkage of hardwood pulps is a few percent higher than that of softwood pulps at the s

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14

Suchá, Kateřina. "Hodnocení kvality/zdraví půdy v blízkosti obce Bohaté Málkovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392022.

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Diploma thesis evaluates quality and healthiness of the soil health located close to Bohate Malkovice focusing on changes in both physical and chemical characteristics of the soil in time. The theoretical part describes physical, chemical, and biological parameters of the soil. Selected physical parameters are structure, texture, determination of measured weight, bulk density of the soil, porosity, actual volumetric water content of the soil, aeration, saturated and unsaturated hydraulic conductivity, infiltration, and colour. Chosen chemical parameters are pH, carbonates, soil electrical cond

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Wu, Yu-Zhang, and 吳郁璋. "Estimating The Moving Routes Of Earthworm By Volumetric Water Content." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/79112538782028198526.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>96<br>The purpose of this study is to discuss the influences of the soil water content on earthworm movements. Three situations including earthworm movement in the soil with dry surface, and the movement of either healthy or sick earthworms in the soil during rainfall via numerical simulations were studied. This study was based upon two assumptions. First, the earthworms inhabit in the homogenous soil. Second, The earthworms go towards the soil with higher growth curve. Here, an 1-D earthworm movement-water content governing equation (EWE) was proposed to descri

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Chiang, Chia-Chen, and 蔣佳真. "Optimal Layout for Volumetric Water Content Measurements of Unsaturated Soil Slope." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/14801496342724855100.

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碩士<br>國立雲林科技大學<br>營建工程系<br>104<br>Recently, climate change in Taiwan has caused extreme weather conditions and resulted in many rainfall-induced slope failures. To predict the transient volumetric water content (VWC) in an unsaturated slope during rainfall, an optimization analysis method based on two dimensional finite element method and Levenberg-Marquart method was proposed. The proposed methodology was verified and proven to be applicable to simulate the transient VWC distributions. A series of inverse analyses on the measured transient volumetric water content of model slopes was performe

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Mohamed, Mostafa H. A., and Kirill V. Horoshenkov. "Airborne acoustic method to determine the volumetric water content of unsaturated sands." 2009. http://hdl.handle.net/10454/6099.

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This paper presents an innovative experimental approach for simultaneous measurements of the suction head, volumetric water content, and the acoustic admittance of unsaturated sands. Samples of unsaturated sands are tested under controlled laboratory conditions. Several types of uniform sand with a wide range of particle sizes are investigated. The reported experiments are based on a standard Buchner funnel setup and a standard acoustic impedance tube. It is a novel, nondestructive, and noninvasive technique that relates the key geotechnical parameters of sands such as volumetric water content

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Chen, Chia-Yang, and 陳佳暘. "The Back Analysis on the Volumetric Water Content of Unsaturated Soil Model Slopes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/16853531751160211743.

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碩士<br>國立雲林科技大學<br>營建工程系碩士班<br>99<br>Recently, climate change in Taiwan has caused more extreme weather conditions and resulted in many rainfall-induced slope failures. To predict the transient volumetric water content (VWC) in an unsaturated slope during rainfall, an optimization analysis method based on two dimensional finite element method and Levenberg-Marquart method was proposed. The proposed methodology was verified and proven to be applicable to simulate the transient VWC distributions. A series of inverse analyses on the measured transient volumetric water content of two model slopes w

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YANG, SHIH-TING, and 楊士霆. "Stability Analysis of Rainfall Infiltrated Unsaturated Soil Slope and its Critical Volumetric Water Content." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4cm5cr.

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碩士<br>國立臺北科技大學<br>土木工程系土木與防災碩士班<br>107<br>Taiwan has many hillsides and many slopes with steep slopes. When these unsaturated slopes are affected by rainfall, the infiltration of water leads to loss of matric suction, which causes the shear strength to decrease and, in turn, leads to the subsequent slope instability. In this study, numerical analysis is used to investigate the infiltration and the instability mechanism of unsaturated slopes affected by rainfall, Through the coupling of solid mechanics equation and the seepage governing equation together with the soil characteristics of the uns

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Tang, Yucao. "Calibration of water content reflectometer in Rocky Mountain arsenal soil." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-08-311.

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This paper describes how water content reflectometers (WCRs) were analyzed to develop a calibration equation. Time domain reflectometry (TDR) technique is the most prevalent method in in-situ moisture monitoring; and WCR is a type of low frequency TDR sensors, which is sensitive to soil type. Developing soil-specific calibration and investigating different environmental effects on WCR calibration is important. This study focused on investigation of the soil dry density and temperature effects on WCR calibration in RMA soil. Two series of tests to develop soil-specific calibration with dry dens

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Chen, Jung-Hua, and 陳容花. "Influence of Rainfall Infiltration on Unsaturated Soil Slope and Critical Volumetric Water Content under Different Rainfall Scenarios." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/38957571487701006706.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>103<br>ABSTRACT The majority of Taiwan’s hillsides belong to unsaturated soil slope. Seepage in these unsaturated slopes situated above groundwater level would easily lead to changes of hydrological characteristics (such as matric suction, etc.) when encountered rainfall, and then trigger subsequent slope stability problems. This study adopted a field case and used numerical analysis program SEEP/W and SLOPE/W module to conduct seepage simulation and stability analysis on unsaturated soil slopes under different rainfall scenarios. In addition to simulation and explor

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Hsu, Kan-Sheng, and 許堪昇. "Soil Temperature and Volumetric Water Content Prediction in Greenhouse by Using Hydrus-1D, ICON and Random Forest Method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/p6tjuv.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>107<br>Due to the impact of climate change and the rising frequency of extreme weather have caused the problem of food security and water resources. Precision agriculture in greenhouses is gradually becoming a trend because it is less affected by external environmental factors and easier to manage. In order to effectively improve the utilization of water resources and reduce wasting water, this study planted cherry tomatoes in the greenhouse and installed monitoring instruments to collect data. The soil temperature and volumetric water content during tomato grow

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Adhikari, Bishwodeep. "The Contributions of Soil Moisture and Groundwater to Non-Rainfall Water Formation in the Namib Desert." Thesis, 2019. http://hdl.handle.net/1805/20533.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Non-rainfall waters such as fog and dew are considered as important source of water in drylands, and the knowledge of possible sources of its formation is very important to make future predictions. Prior studies have suggested the presence of radiation fog in drylands; however, its formation mechanism still remains unclear. There have been earlier studies on the effects of fog on soil moisture dynamics and groundwater recharge. On the contrary, no research has yet been conducted to understand the contribution of soil moisture and gro

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Preko, Kwasi [Verfasser]. "Determination of volumetric soil water content using ground penetrating radar = Bestimmung des volumetrischen Bodenwassergehaltes mit dem Bodenradar / vorgelegt von Kwasi Preko." 2008. http://d-nb.info/987794604/34.

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Abdelkhalik, Abdelsattar Gamal Abdelsattar. "Effect of continued and regulated deficit irrigation on the productivity of four vegetable crops in open-field conditions in the Mediterranean area." Doctoral thesis, 2020. http://hdl.handle.net/10251/129868.

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[ES] La escasez de agua se está convirtiendo en un problema en zonas áridas y semiáridas del mundo, donde se localiza parte de la producción de los principales cultivos hortícolas, como en el área mediterránea. La sequía es uno de los principales factores limitantes en la agricultura y está afectando gravemente a la producción de cultivos hortícolas. La mejora de la productividad del agua en la agricultura puede lograrse mediante la utilización de determinadas estrategias. El riego deficitario consiste en el aporte de agua por debajo de las necesidades de riego (NR) de los cultivos, de manera

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Slavík, Martin. "Vlhkostní charakteristiky přirozených pískovcových výchozů." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-398168.

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Moisture in a sandstone body plays a notable role in hydrological, weathering, biological and other processes. Knowledge about presence and movement of moisture within porous medium of natural sandstone exposures is, however, rather limited. Aim of the doctoral thesis was thus to quantify selected moisture characteristics of several natural sandstone exposures in Český ráj (Czech Republic). According to long-term logging, mean annual temperature at studied areas was between 8.5 řC to 11.5 řC, mean annual relative humidity was between 73 % to 85 %. Deforested area was found warmer and drier and

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