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Relevant bibliographies by topics / Deep soil layers

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Academic literature on the topic 'Deep soil layers'

Author: Grafiati

Published: 25 May 2024

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Journal articles on the topic "Deep soil layers"

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Fei, Wang, Xu Yilu, Yang Xiaodong, Liu Yanju, Lv Guang-Hui, and Yang Shengtian. "Soil water potential determines the presence of hydraulic lift of Populus euphratica Olivier across growing seasons in an arid desert region." Journal of Forest Science 64, No. 7 (2018): 319–29. http://dx.doi.org/10.17221/49/2018-jfs.

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Hydraulic lift (HL) of deep-rooted plants is a water adaptation phenomenon to extreme drought conditions which would subsequently improve the survival of shallow-rooted plants in an arid desert area. There is an ongoing debate on whether the difference in water potential between plant roots and soils determine the presence of HL, thus considerable research efforts are needed to improve our understanding. In this study, we used the Ryel model and comparative analysis to determine the changes in soil water potential (SWP), the soil layer of obtaining water from plant roots (SLOW), the amount wat

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S. P., Pogorilyy, Prysyazhnyi V. G., and Shkarivskyi G. V. "Research of the reasons of excessing the air and underground soil layers of the deep blocked soils of black earth." Mehanization and electrification of agricultural, no. 15(114) (2022): 124–30. http://dx.doi.org/10.37204/0131-2189-2022-15-15.

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Purpose. Investigation of the causes of compaction of arable and subsoil soil layers of deep podzolic chernozems. Methods. Experimental studies of the density of arable and subsoil soil layers of deep podzolic chernozems with subsequent processing of the results on a PC. Results. The results of experimental researches of formation of the overcompacted layers of chernozems of deep podzolic depending on ways and means of influence on them are stated. Conclusions. As a result of research it is established that on deep chernozem chernozems the maximum depth of overcompacted layers formed by self-c

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Zhang, Shu-Wen, Xubin Zeng, Weidong Zhang, and Michael Barlage. "Revising the Ensemble-Based Kalman Filter Covariance for the Retrieval of Deep-Layer Soil Moisture." Journal of Hydrometeorology 11, no. 1 (2010): 219–27. http://dx.doi.org/10.1175/2009jhm1146.1.

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Abstract Previous studies have demonstrated that soil moisture in the top layers (e.g., within the top 1-m depth) can be retrieved by assimilating near-surface soil moisture observations into a land surface model using ensemble-based data assimilation algorithms. However, it remains a challenging issue to provide good estimates of soil moisture in the deep layers, because the error correlation between the surface and deep layers is low and hence is easily influenced by the physically limited range of soil moisture, probably resulting in a large noise-to-signal ratio. Furthermore, the temporall

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Xie, Haixia, Shuai He, Chuanqin Huang, and Wenfeng Tan. "Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China." Minerals 9, no. 2 (2019): 100. http://dx.doi.org/10.3390/min9020100.

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In this paper, salinized soils with different degrees of salinity are sampled in Junggar Basin of Xinjiang of China. The X-ray diffraction, transmission electron microscopy, and inductively coupled plasma mass spectrometry are employed to investigate the morphology and distribution characteristics of smectite in salinized soil profiles. In the salinized soil profiles of this region, crystals of smectite are poor where lattice fringes are not parallel. In all soil layers, the content of smectite in the soil increases with the decrease in content of illite, which has demonstrated significant neg

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Juraev, Fazliddin U., Umeda X. Umedova, Shuxrat B. Shodiyev, Amrillo A. Fayziyev, and Abrorjon A. ugli Savriddinov. "Deep tillage using bioselvent preparation before soil washing." BIO Web of Conferences 82 (2024): 01016. http://dx.doi.org/10.1051/bioconf/20248201016.

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The article presents a new tool for deep soil tillage, as well as design, operation principles and parameters of two-tier deep tillage device used in the process of deconsolidation of gypsum and dense soil layers according to a special technology with active rotating working bodies and the technology of its application, while improving the ameliorative state of saline soils using the biosolvent chemical composition with spraying on the soil surface and inner layer, before the autumn washing with salt, and washes out harmful salts from the soil. The developed tools and the parameters of their d

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Wang, Shaofei, Xiaodong Gao, Min Yang, et al. "The natural abundance of stable water isotopes method may overestimate deep-layer soil water use by trees." Hydrology and Earth System Sciences 27, no. 1 (2023): 123–37. http://dx.doi.org/10.5194/hess-27-123-2023.

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Abstract. Stable water isotopes have been used extensively to study the water use strategy of plants in various ecosystems. In deep vadose zone (DVZ) regions, the rooting depth of trees can reach several meters to tens of meters. However, the existence of roots in deep soils does not necessarily mean the occurrence of root water uptake, which usually occurs at a particular time during the growing season. Therefore, quantifying the contribution of deep-layer soil water (DLSW) in DVZ regions using the natural abundance of stable water isotopes may not be accurate because this method assumes that

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Shi, Ming, Lianjin Tao, and Zhigang Wang. "Study on the Influence of Deep Soil Liquefaction on the Seismic Response of Subway Stations." Applied Sciences 14, no. 6 (2024): 2307. http://dx.doi.org/10.3390/app14062307.

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Subway systems are a crucial component of urban public transportation, especially in terms of safety during seismic events. Soil liquefaction triggered by earthquakes is one of the key factors that can lead to underground structural damage. This study investigates the impact of deep soil liquefaction on the response of subway station structures during seismic activity, aiming to provide evidence and suggestions for earthquake-resistant measures in underground constructions. The advanced finite element software PLAXIS was utilized for dynamic numerical simulations. Non-linear dynamic analysis m

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Na, Li, Risu Na, Yongbin Bao, and Jiquan Zhang. "Time-Lagged Correlation between Soil Moisture and Intra-Annual Dynamics of Vegetation on the Mongolian Plateau." Remote Sensing 13, no. 8 (2021): 1527. http://dx.doi.org/10.3390/rs13081527.

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Soil moisture is a reliable water resource for plant growth in arid and semi-arid regions. Characterizing the interaction between soil moisture and vegetation is important for assessing the sustainability of terrestrial ecosystems. This study explores the spatiotemporal characteristics of four soil moisture layers (layer 1: 0–7 cm, layer 2: 7–28 cm, layer 3: 28–100 cm, and layer 4: 100–289 cm) and the time-lagged correlation with the normalized difference vegetation index (NDVI) for different vegetation types on an intra-annual scale on the Mongolian Plateau (MP). The most significant results

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Wei, Di, Yang Zhang, Yiwen Li, Yun Zhang, and Bo Wang. "Hydrothermal Conditions in Deep Soil Layer Regulate the Interannual Change in Gross Primary Productivity in the Qilian Mountains Area, China." Forests 14, no. 12 (2023): 2422. http://dx.doi.org/10.3390/f14122422.

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The variability in soil hydrothermal conditions generally contributes to the diverse distribution of vegetation cover types and growth characteristics. Previous research primarily focused on soil moisture alone or the average values of soil hydrothermal conditions in the crop root zone (0–100 cm). However, it is still unclear whether changes in gross primary productivity (GPP) depend on the hydrothermal conditions at different depths of soil layers within the root zone. In this study, the soil hydrothermal conditions from three different layers, surface layer 0–7 cm (Level 1, L1), shallow laye

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Jamshed, Muhammad Ammar. "Analyze Soil Fertility using Deep Learning Convolutional Neural Networks." Shanlax International Journal of Arts, Science and Humanities 10, no. 3 (2023): 1–5. http://dx.doi.org/10.34293/sijash.v10i3.5281.

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This research revolves around how plant soil potential can be further discovered and used for farming through detection of relevant nutrients and chemicals within the soil landscapes within areas and even desert climates and how we can improve land soil fertility of the purpose of farming both using Convolutional neural networks which process of imagery in layers and predictive detections of objects within image backgrounds and frontal lobes. When we view layers for farming beneath the surface to understand suitability of farming done on top. The general model applied can be summarized as foll

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Dissertations / Theses on the topic "Deep soil layers"

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Silva, Vinicius Evangelista. "Atributos do solo e desenvolvimento radicular em plantações de eucalipto no Brasil /." Ilha Solteira, 2019. http://hdl.handle.net/11449/182207.

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Orientador: Salatier Buzetti<br>Resumo: O desenvolvimento radicular em plantações de eucalipto tem sido apontado como uma das estratégias cruciais para sua adaptação e crescimento, em especial, em condições tropicais, que possuem solos pobres em nutrientes. Neste contexto, torna-se extremamente importante avaliar o perfil do solo nestas plantações, a luz de uma perspectiva de fornecimento de nutrientes e água para as plantações de eucalipto. Tendo isto em vista, especificamente nesta tese, dois trabalhos foram conduzidos para avaliar os atributos do solo e o desenvolvimento radicular em planta

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El, Mekdad Fatima. "La rhizodéposition dans les horizons profonds du sol peut-elle permettre de stocker du carbone ?" Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS086.pdf.

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L'augmentation des émissions anthropiques de CO2 dans l'atmosphère accélère le changement climatique. Les sols contiennent trois fois plus de carbone que l'atmosphère et constituent donc un réservoir d'importance cruciale pour la régulation du climat. Il existe actuellement une réflexion pour stocker le carbone dans les couches profondes du sol, notamment via la rhizodéposition des plantes. Nous avons donc mené une expérience au CEREEP-Ecotron Ile-de-France pour quantifier les apports, et la persistance, du carbone rhizodéposé par les plantes à l'aide d'un marquage continu au 13C-CO2. Pour ce

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Peiris, Thanuja Pubudini. "Soil-pile interaction of pile embedded in deep layered marine sediment under seismic excitation." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/75518/1/Thanuja%20Pubudini_Peiris_Thesis.pdf.

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This research provides validated Finite Element techniques to analyse pile foundations under seismic loads. The results show that the capability of the technique to capture the important pile response which includes kinematic and inertial interaction effects, effects of soil stiffness and depth on pile deflection patterns and permanent deformations.

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Khamis, Enad. "Compression of a thin layer overlying deep soil deposit." Thesis, 2003. http://spectrum.library.concordia.ca/2400/1/MQ91057.pdf.

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Roads constitute the largest and most expensive project governments undertake. The deterioration of the infrastructure of these roads represents a major and outstanding problem in transportation engineering. Construction of roads is usually made by stripping the top soil (600 to 1000 mm), which often contains organic materials, and replacing it with a layer of subgrade material (crushed stones, well-graded sand). A thin layer of asphalt or concrete is usually placed on the top of the subgrade layer to provide a durable surface. This thesis examines the role of a deep deposit on the compressio

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Book chapters on the topic "Deep soil layers"

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Hammam, Adel H., and A. E. Abdel Salam. "Behavior of Bored Piles in Two Soil Layers, Sand Overlaying Compressible Clay (Case Study)." In Advances in Analysis and Design of Deep Foundations. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61642-1_2.

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Morimoto, Junko, Susumu Goto, Akito Kuroyanagi, Motoko Toyoshima, and Yuichiro Shida. "Natural Succession of Wetland Vegetation in a Flood-Control Pond Constructed on Abandoned Farmland." In Ecological Research Monographs. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6791-6_13.

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AbstractCan a flood-control basin be considered a component of green infrastructure (GI) with not only disaster prevention functions but also biodiversity conservation functions? We studied the succession of wetland vegetation in a flood-control basin constructed in a floodplain. The number of species composing the buried seeds depended on the depth of the soil layer, with shallower (recent) layers having more species. Plants germinated from buried seeds in deep (ancient) soil layers were small and difficult to identify based on morphology alone, but DNA-based analyses made it possible to identify these species. The occurrence of three species of Juncus and Cyperus in the peat layer that developed between 840 and 1215 years ago indicates that it is possible to regenerate wetland plants from the past if the buried seeds are well preserved and in good condition. The excavated section of the experimental site, which was set in part of the flood-control basin, received dispersed seeds from the surrounding agricultural land and contained more species than did the soil layer itself. The shallower the water depth was (the shallower the excavation depth), the greater the number of species that occurred. In addition, species with different life forms occurred depending on the water depth. More species occurred in the entire flood-control basin than in the experimental site. The factors that determined the type of plant community were years since excavation, water depth, and water quality. Finally, we discussed the management practices concerning the supply of propagules and the management of suitable habitats as essential factors for flood-control basins constructed on fallow land to function as GI.

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Zhu, Jiao, Guoxing Chen, and Dingfeng Zhao. "The Influence of Bedrock Surface Depth on Seismic Site Response in Deep Sediment Layers." In Proceedings of GeoShanghai 2018 International Conference: Advances in Soil Dynamics and Foundation Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0131-5_25.

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Li, Guowei, Ruyi Liu, Chao Zhao, Yang Zhou, and Li Xiong. "Compaction Effect Due to Single Pile Driving in PHC Pile Treated Soft Clayey Deposit." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2532-2_26.

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AbstractThe compaction effect of extra-long prestressed high-strength concrete (PHC) piles in deep soft soil foundation was studied by field test. The pore water pressure gauge, inclinometer were embedded in different plane positions or different depths of the foundation to monitor the pore pressure and deformation of the foundation when driving pile. The research shows that the magnitude of excess pore water pressure caused by single pile installation is mainly related to buried depth of the measuring point and the linear distance between the pile tip and the measuring point. The shorter the distance or the deeper the depth is, the greater the excess pore pressure caused by pile installation. The horizontal influence radius of pile compacting on the pore water pressure is about 10.7 m. The excess pore pressure induced by pile installation increases with depth, and is obviously affected by stratum properties. In the vicinity of soil with high permeability coefficient, such as thin sand layer or silty fine sand layer, the excess pore pressure cannot be accumulated in a large amount. The existing subgrade obviously restricts the lateral deformation of soil between piles and PHC piles. The pile deformation is small at the top and bottom, and large in the middle. The inflection point of the deformation curve appears at the pile connection position. The relationship the excess pore pressure of the measuring point with the depth and distance of the measuring point is given.

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Huynh, Quoc Thien, Van Qui Lai, Viet Thai Tran, and Minh Tam Nguyen. "Back Analysis on Deep Excavation in the Thick Sand Layer by Hardening Soil Small Model." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5144-4_63.

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Suzuki, Maki. "Responses of Ground-Layer Vegetation and Soil Properties to Increased Population Density of Sika Deer and Environmental Conditions." In Ecological Research Monographs. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9554-4_24.

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Qin, Yunzhu, Dayang Nur Sakinah Musa, Shaorun Lin, and Xinyan Huang. "Persistent Underground Smouldering Fire in Deep Peat Layer." In Advances in Forest Fire Research 2022. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_192.

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Peatlands are important terrestrial carbon pools. Due to climate change and human activities, peatlands are more prone to large-scale fires than ever before, especially deep underground fires. However, most current smouldering researches focus on small-scale smouldering behaviour in relatively shallow layers, which poses a research gap. This work explores in-depth (up to 60 cm) smouldering behaviour, such as persistence, propagation and emission. Experimental results demonstrate that underground smouldering fires can sustain in deep soil layers for more than a week without any additional oxygen supply. Because of the competition of oxygen supply and heat losses, a critical depth of 55 cm for smouldering propagation was obtained, below which smouldering cannot self-sustained propagate. This work will help better connect lab-scale experiments with real underground smouldering peat fires and understand smouldering dynamics in deep soil layers.

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Evans, M. E. G. "Ground beetles and the soil: their adaptations and environmental effects." In The Environmental Impact of Burrowing Animals and Animal Burrows. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198546801.003.0008.

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Abstract Ground beetles form a reservoir of predators in the upper soil levels of most terrestrial habitats. Although best known as surface runners, ground beetles may burrow into the soil to find prey, to store food such as seeds, for concealment (from predators or prey), or to reach deep hibernation sites. The most specialized burrowers are the Scaritini, which have elongate, pedunculate bodies and a range of digging adaptations. Their tunnels may reach over 70 cm, but most carabids penetrate only the more superficial layers of the soil, especially the litter and humus layers. This intrusion is facilitated by a horizontal pushing ability which differs widely between species. All carabid locomotor capabilities are compromises at various levels between the reciprocal abilities of running and pushing. Scaritines have emphasized the force component and tiger beetles the speed component, but most carabids exhibit a medium-speed/medium-force compromise. In all ground beetles the horizontal pushing ability is enhanced by a strong or weak wedge pushing ability. The ground beetle technique of wedge-pushing has been compared to the more sophisticated methods shown by two distinct groups of millipedes. The effect of all these wedge-pushers is to split up matted leaves and slow down the annual compaction of the litter layer. As with deep burrowers, their activities aid soil drainage, aeration and the movement of nutrients.

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Miguel, Pablo, Tiago Schuch Lemos Venzke, Adão Pagani Junior, et al. "Physical Quality of Soils in a Toposequence of a Forest Fragment under Livestock Activity in a Watershed in South Brazil." In Sustainable Development. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106560.

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The conservation of native forests is fundamental to the preservation of hydric resources in the landscape. The use of animals in forest fragments has resulted in degradations in the soil, resulting in the grating of these. Thus, soil classes were studied and physical parameters of forest soils were evaluated in areas without and with cattle grazing in the “Arroio Pelotas” watershed, Pelotas, Rio Grande do Sul, extreme south of Brazil. The results were submitted to statistical analysis with the Kruskal–Wallis nonparametric test with a significance level of 5%. The means of the physical parameters of soil in the same toposequence and layers with and without the presence of livestock were compared. By analyzing soil physical attributes (density, macroporosity, and microporosity) it can be seen that the structural quality of the soil is affected by the access of animals inside the forest fragments, especially in the upper layer of the soil (0–5 cm deep). In forest fragments without access to animals, the physical structure of the soil presented the best conditions of macroporosity and, consequently, greater protection of nutrients, microorganisms, and water resources. Therefore, it is concluded that conservation by the isolation of protective forests in rural property planning benefits the quality of forest soils.

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Keefer, Robert F. "Effective Water Use—Irrigation." In Handbook of Soils for Landscape Architects. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195121025.003.0010.

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Soils that are suitable for irrigation are deep soils that are permeable and have a high available water-holding capacity (usually containing much organic matter). Limitations for irrigation include presence of restrictive layers (pans), erodible soils, sloping land, susceptibility to stream overflow, salinity or alkalinity, stoniness, and hazard of soil blowing. The amount of plant-available water in a soil depends on rooting depth and soil texture. Coarse textured sands hold much less available water than finer textured clayey soils. Available water increases as the texture becomes finer up to a silt loam. Any soil texture finer than that results in no additional increase in available water. In shallow soils, the rooting depth is limited by the soil depth. In deep soils, root depth is determined by the kind of plants present: . . . Trees and large shrubs 48 inches depth Medium shrubs and vines 40 inches depth Small shrubs and ground cover 24 inches depth . . . A number of techniques can be used to determine when water should be applied to soil in which plants are growing. These techniques include observing the plants, especially for wilting; feeling the soil; using tensiometers or electrical resistance meters installed in the soil; and measuring temperatures of plant leaves. Wilting—When plants begin to lose water they droop and wilting results. If plants remain in this condition very long, they soon die. It is better to water plants before they become wilted. Any plant that is wilted will require some time to reestablish its water equilibrium, thereby slowing the growth of that plant. The amount of moisture in a soil can be roughly estimated by the “feel method”. The degree of moisture can be determined by rolling or squeezing the soil into a ball. The soil moisture condition can be divided into six categories from dry to very wet: . . . a. If a ball will not form → soil is too dry for plants. b. If the ball formed will not crumble when rubbed → soil is too wet for plants. . . .

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Conference papers on the topic "Deep soil layers"

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Toda, Misato, Petar Mandaliev, and Raffael Schreiber. "Is microplastic transported into deep soil layers? Analysis of agricultural soil using hyperspectral imaging and artificial neural networks." In Goldschmidt2023. European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.20652.

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Харчук, Олег, Светлана Баштовая та А. Кириллов. "Динамика влажности почвы в агрофитоценозах сои в годы, предшествовавшие засухе-2020". У International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.85.

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In the soybean cenosis (mainly the Aura variety) with a characteristic density (400-500 × 103 plants/ha), the dynamics of soil moisture in the years preceding the drought-2020 was studied. The main factor of drought-2020 is the low (about 100 mm lower than the average annual value) moisture accumulation in the soil before sowing for the autumn-spring 2019/2020, mainly due to low precipitation. An additional prerequisite for drought-2020 is a decrease in soil moisture (including deep soil layers) during harvesting in recent years, which is the reason for an additional deficit in a soil layer 0-

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Al-Masri, M. S., A. Aba, A. Al-Hamwi, and H. Mukallati. "Characterization of NORM Contaminated Sites at the Syrian Oilfield: Depth Profiles and Leaching Processes." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4772.

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Production water containing naturally occurring radioactive materials (NORM) has been collected in unlined artificial lagoons for evaporation in some Syrian oilfields. These lagoons have become highly contaminated with NORM and the situation has urged the operating oil companies in Syria to initiate a remediation program in cooperation with the Atomic Energy Commission of Syria. Part of this national remediation program is to characterize the contaminated soil as a preliminary step for disposal of this waste. Depth profiles of radioactivity have been established and found to be variable from o

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Malii, Aliona, and Oleg Harciuc. "Water use by soybean varieties of different maturity groups." In Scientific International Symposium "Plant Protection – Achievements and Perspectives". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2023. http://dx.doi.org/10.53040/ppap2023.51.

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The seasonal change in soil moisture reserves in dependence on the genetic form of soybeans was studied. It has been established that the deep layers of the soil (40-150 cm) more consistently reflect the influence of the plant component than the surface ones. In 2021, water reserves decreased in the 0-150 cm layer: for the Pentata variety - by 103 mm, and for the Onika variety- by 53 mm. Thus, Onika variety (MG I) retained 50 mm more water in the field for the next season compared to variety Pentata (MG III).

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Tsurumaki, Shizuo, Hiroyuki Watanabe, Akira Tateishi, Kenichi Horikoshi, and Shunichi Suzuki. "Evaluation of Dynamic Behavior of Pile Foundations for Interim Storage Facilities Through Geotechnical Centrifuge Tests." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22505.

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In Japan, there is a possibility that interim storage facilities for recycled nuclear fuel resources may be constructed on quaternary layers, rather than on hard rock. In such a case, the storage facilities need to be supported by pile foundations or spread foundations to meet the required safety level. The authors have conducted a series of experimental studies on the dynamic behavior of storage facilities supported by pile foundations. A centrifuge modeling technique was used to satisfy the required similitude between the reduced size model and the prototype. The centrifuge allows a high con

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Mallants, Dirk, Doncho Karastanev, Dimitar Antonov, and Janez Perko. "Innovative In-Situ Determination of Unsaturated Hydraulic Properties in Deep Loess Sediments in North-West Bulgaria." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7202.

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In the framework of selecting a suitable site for final disposal of low- and intermediate level short-lived radioactive waste (LILW-SL) in Bulgaria, site characterization is ongoing at the Marichin Valog site, North-West Bulgaria. The site is characterized by a complex sequence of loess, clayey gravel, and clay layers, of which the first 30–40 m are unsaturated. Proper knowledge about unsaturated water flow and concomittant radionuclide transport is key input to safety assessment calculations. Constant-head infiltrometer tests were carried out at several meters below ground surface to determin

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Torgovnikov, Grigory, and Graham Brodie. "G. Brodieand, G. Torgovnikov. EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ." In Ampere 2019. Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/ampere2019.2019.9651.

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EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ. G. Brodie and G. Torgovnikov University of Melbourne, 4 Water St, Creswick, Victoria 3363, Australia; e-mail: grigori@unimelb.edu.au Keywords: ceramic applicator, comb applicator, microwave, slow wave, soil microwave treatment In many cases in industry it is required to heat or treat surface layers of different material (soil, timber, concrete, plastics and so on) with microwaves (MW). Traditional MW irradiators (antennas) cannot provide heating only in the surface areas and energy

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Gregersen, Kathrine, Guttorm Grytøyr, Jerome De Sordi, and Kristoffer H. Aronsen. "Validation of Soil Models for Wellhead Fatigue Analysis." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61644.

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The focus on wellhead fatigue has increased over the last decade, both in terms of consequences of failure and methods for prediction. Wellhead Fatigue is a well integrity concern when drilling subsea wells, especially with exposure to harsh environments and extreme environmental loads. The concern increases with the use of deep water drilling rigs in shallow water. As a result, full-scale measurement has been employed in several projects to document the actual load levels experienced by the subsea wellheads during drilling. Input data uncertainty has always been a challenge when using global

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Purvina, Dana, Ieva Licite, Aldis Butlers, et al. "Evaluation of peat layer thickness effect on soil GHG fluxes." In 22nd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2023. http://dx.doi.org/10.22616/erdev.2023.22.tf096.

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Organic soils are the largest source of GHG emissions in Latvia producing the amount of emissions comparable with the whole energy sector. Organic soils in cropland and grassland alone release about 4.5 mill. tonnes of CO2 eq. annually, which is nearly twice as big as the total emissions from the agriculture sector in Latvia. The reduction of the emissions from the organic soils is the primary target to implement the climate neutrality target in the post-2050 period in LULUCF sector. One of the issues in reporting of GHG emissions from organic soils is different definitions of organic soils, e

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Charnaux, P., I. A. Perez, C. A. B. Silveira, and V. P. C. Braga. "Geotechnical Site Investigation Over 3500 Meters Depth." In Offshore Technology Conference. OTC, 2024. http://dx.doi.org/10.4043/35269-ms.

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Abstract This paper aims to present a survey executed in 3000 meters depth, to support the design of subsea structures in exploration blocks located in Sergipe/Alagoas basin, Brazil, with geotechnical work made over 3500 meters depth, using a Piston Corer for sampling and a gravity CPT for testing. The vessel used for this project was R/V Seward Johnson, a Research/Survey vessel. The Piston Corer used for the survey, to work in depths above 3000 meters, was configured with a core head weighing 1,500 kg, with a maximum length of the sampling tube of 12 m and a 3.5 meters free fall. The samples

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Reports on the topic "Deep soil layers"

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Løvschal, Mette, Havananda Ombashi, Marianne Høyem Andreasen, et al. The Protected Burial Mound ‘Store Vejlhøj’, Vinderup, Denmark: First Results. Det Kgl. Bibliotek, 2023. http://dx.doi.org/10.7146/aulsps-e.479.

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An archaeological excavation of the protected burial mound Store Vejlhøj in northwestern Denmark was carried out in October-November 2021. The excavation formed part of the ERC-funded research project called ANTHEA, focusing on the deep history of anthropogenic heathlands. It was conducted by Aarhus University in collaboration with Holstebro Museum and Moesgaard Museum. The aim was to test a new method of sampling pollen data from different construction stages in a burial mound and comparing them with pollen data from nearby lake sediments with a view to improving our understanding of prehisto

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Eshel, Amram, Jonathan P. Lynch, and Kathleen M. Brown. Physiological Regulation of Root System Architecture: The Role of Ethylene and Phosphorus. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7585195.bard.

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Specific Objectives and Related Results: 1) Determine the effect of phosphorus availability on ethylene production by roots. Test the hypothesis that phosphorus availability regulates ethylene production Clear differences were found between the two plants that were studied. In beans ethylene production is affected by P nutrition, tissue type, and stage of development. There are genotypic differences in the rate of ethylene production by various root types and in the differential in ethylene production when P treatments are compared. The acceleration in ethylene production with P deficiency inc

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