Relevant bibliographies by topics / 090702 Environmental Engineering Modelling

Academic literature on the topic '090702 Environmental Engineering Modelling'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "090702 Environmental Engineering Modelling"

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Hoti, Suhejla, Michael McAleer, and Laurent L. Pauwels. "Modelling environmental risk." Environmental Modelling & Software 20, no. 10 (October 2005): 1289–98. http://dx.doi.org/10.1016/j.envsoft.2004.08.010.

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Hobbs, S. E. "Modelling change in environmental systems." Applied Ocean Research 17, no. 5 (October 1995): 323. http://dx.doi.org/10.1016/0141-1187(95)90002-0.

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Schulin, Rainer. "Advances in Environmental Modelling (Developments in Environmental Modelling, Vol. 13)." Journal of Environmental Quality 19, no. 3 (July 1990): 631–32. http://dx.doi.org/10.2134/jeq1990.00472425001900030049x.

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Hamilton, E. I. "Advances in environmental modelling." Science of The Total Environment 92 (March 1990): 287–88. http://dx.doi.org/10.1016/0048-9697(90)90344-t.

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Rasinmäki, Jussi. "Modelling spatio-temporal environmental data." Environmental Modelling & Software 18, no. 10 (December 2003): 877–86. http://dx.doi.org/10.1016/s1364-8152(03)00106-3.

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McAleer, Michael. "Modelling economic and environmental systems." Environmental Modelling & Software 20, no. 11 (November 2005): 1365–67. http://dx.doi.org/10.1016/j.envsoft.2004.09.009.

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LUX, T., and W. MATTHEWS. "Advanced technology for environmental modelling." Environmental Modelling & Software 22, no. 3 (March 2007): 279–80. http://dx.doi.org/10.1016/j.envsoft.2005.07.027.

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Hutson, John L. "Modelling in Ecotoxicology (Developments in Environmental Modelling 16)." Journal of Environmental Quality 20, no. 4 (October 1991): 879–80. http://dx.doi.org/10.2134/jeq1991.00472425002000040035x.

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Janowski, Artur, Jakub Szulwic, and Paweł Tysiąc. "Spatial Modelling in Environmental Analysis and Civil Engineering." Applied Sciences 11, no. 9 (April 27, 2021): 3945. http://dx.doi.org/10.3390/app11093945.

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Wang, Julian Z. "Statistical modelling for extreme observations in environmental engineering." Environmetrics 9, no. 1 (January 1998): 31–36. http://dx.doi.org/10.1002/(sici)1099-095x(199801/02)9:1<31::aid-env283>3.0.co;2-d.

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Dissertations / Theses on the topic "090702 Environmental Engineering Modelling"

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Kamalian, Ulric. "Integrated 2D-3D free surface hydro-environmental modelling." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/26089/.

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An integrated horizontally two- and fully three-dimensional numerical model system has been developed based on a combined unstructured and σ-coordinate grid to simulate the flow and water quality process in large water bodies with a focus on the three dimensional behaviours at specific areas. The model is based on the time dependent Reynolds-Averaged Navier-Stokes equations with a non-hydrostatic pressure distribution and a baroclinic force being incorporated in the three dimensional (3D) model. The two sub models interact dynamically during the solution procedure with no time-step restriction due to integration. The main idea is to use a fractional step algorithm for each model and then integrate the two models fraction by fraction. Hybrid 2D-3D finite volume cells have been introduced for the link nodes which are partly in the 2D domain and partly in the 3D domain. Thus an interpolation/averaging procedure at the interface and domain overlapping is no longer needed. The 3D model uses the projection method for pressure calculation. The advection equation is solved by the semi-Lagrangian method. Other components are solved via the finite element - finite volume (FV) method. The water surface is determined implicitly through a global matrix equation created by assembling the domain's matrices. The cell integrals are calculated analytically to eliminate a common source of numerical diffusion due to the use of approximation techniques for the FV integrals. The horizontal gradients of the density and shear stresses are calculated on true horizontal planes, in order to avoid artificial velocity and diffusion in highly stratified flows. Neumann interpolation elements with virtual nodes have been introduced at Neumann type of boundaries for more accuracy. The integrated model has been verified using analytical solutions and benchmark test cases, including the Ekman velocity distribution, wind driven circulation, lock exchange and integrated 2D-3D flows in basin. The results show the model is capable of the model for accurate simulation and implicit 2D-3D integration. Keywords: integrated modelling, hydrodynamic numerical model, non-hydrostatic, unstructured mesh, hybrid finite element finite volume method.
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Giles, David. "Computer-based modelling and analysis in engineering geology." Thesis, University of Portsmouth, 2014. https://researchportal.port.ac.uk/portal/en/theses/computerbased-modelling-and-analysis-in-engineering-geology(091c5104-4dbb-4e90-b897-aaf34702100a).html.

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This body of work presents the research and publications undertaken under a general theme of computer-based modelling and analysis in engineering geology. Papers are presented on geotechnical data management, data interchange, Geographical Information Systems, surface modelling, geostatistical methods, risk-based modelling, knowledge-based systems, remote sensing in engineering geology and on the integration of computer applications into applied geoscience teaching. The work highlights my own personal contributions and publications under this theme as well as collaborations and output emanating from PhD co-supervisions which have included the following projects: A geotechnical and geochemical characterisation of dry oil lake contaminated soil in Kuwait; Dust dispersion monitoring and modelling; Geotechnical properties of chalk putties; The application of airborne multispectral remote sensing and digital terrain modelling to the detection and delineation of landslides on clay dominated slopes of the Cotswolds Escarpment; Domestic property insurance risks associated with brickearth deposits; Development of a knowledge-based system methodology for designing solid waste disposal sites in arid and semi-arid environments; GIS Techniques as an aid to the assessment of earthquake triggered landslide hazards; The application of GIS as a data integrator of pre-ground investigation desk studies for terrain evaluation and investigation planning; The influence of clay mineralogy pore water composition and pre-consolidation pressure on the magnitude of ground surface heave due to rises in groundwater level. My publication record comprises; Pathfinder and seminal papers; Papers from co-supervised PhD programmes; Pedagogic contributions; Encyclopaedia entries; International collaborations; Technical authorship and support; Other published contributions; Confidential development and technical reports and Internal briefing papers.
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Lovas, Stéphanie. "Theoretical modelling of two wave-power devices." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/57988.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, February 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 161-163).
Many wave energy devices are currently studied. In this thesis we focus on two specific devices: the Oscillating Water Column (OWC), and the buoys. In the first part of this thesis we examine the effects of coastline geometry on the performance of an OWC. Under the assumption of inviscid irrotationnal flow, we develop a linear theory for the velocity potential for the case of a coastline of arbitrary apex angle. Scattering and radiation problems are solved separately using eigenfunctions expansions, and are then combined to study the energy extraction rate. Numerical simulations for a convex and a concave corner are considered and comparison with an OWC at the tip of a thin breakwater and on a straight coast are discussed. Assuming that the multiple-turbine system can be controlled over a wide range of frequencies, we study the effects of fixed chamber size and air compressibility on the optimal power extraction. A simpler way of optimization is then develop and we show that this simpler scheme can achieve almost as high an efficiency as the idealized many-frequency optimization. In the second part of this thesis, we first model theoretically an array of cylinders and then apply the theory developped to an array of buoys. However, numerical difficulties encountered for the array of cylinders have led to the conclusion that the theory developed is numerically inefficient, although it is accurate.
by Stéphanie Lovas.
S.M.
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Taiwo, Adewale Matthew. "Receptor modelling of industrial air pollutants." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4662/.

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The presence of particulate and gaseous pollutants at elevated concentrations in the atmospheric environment is detrimental to public health. The present study has investigated the impacts of a steelworks complex on the air quality in Port Talbot, South Wales, United Kingdom. Different offline and online air monitoring instruments were deployed to four sites around the perimeter of the steelworks (at one coastal site (Little Warren LW) and 3 inland sites placed along the length of the steelworks (Fire Station FS, Prince Street PS and Dyffryn School DS) in the study area for a four-week campaign (April 16 to May 16, 2012). Prior to Port Talbot campaign, a separate two week sampling (March 30 to April 12, 2012) was conducted at Elms Road Observatory Site (EROS) for a representation of an urban background. Gaseous and meteorological data logged during the period of sampling were also collected from the Automatic Urban and Rural Network (AURN) site at Port Talbot Margam (FS site). Hourly and daily data collected were prepared for receptor modelling using Positive Matrix Factorization (PMF) and with the use of Open Air and Lakes Environmental WRPLOT View software, windrose and polar plots were produced to show the directional emissions of particulate and gaseous pollutants. The online sampling instrument of Aerosol Time of Flight Mass Spectrometer (ATOFMS) as well as PMF solutions for Streaker and Partisol were able to identify different processing units of the steelworks responsible for pollutant emissions. The polar plots for most air pollutants revealed the steel industry as the major contributor to air pollution in the study area.
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Khalid, M. (Muhammad). "Erosion of organic sediments and modelling of sediment transport in peat drainage area." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201502131085.

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Detailed knowledge from physical properties of sediment such as erosion and settling velocity are crucial for modelling as well as for water protection planning and management. The main purpose of this research was to determine the critical shear stress (τcr) and settling velocity of the organic sediments in different peatland drainage areas and headwaters in Finland. Further, KINEROS2 erosion model was applied to peatland forestry and peat extraction conditions to simulate runoff hydrograph and suspended solid yield from two experimental catchments. To determine mean τcr and settling velocity totally 119 undisturbed sediment samples were taken from the natural streams, ditches and brooks across Finland. The samples covered main peatland uses, peatland forestry and peat extraction sites. Furthermore, to determine the effect of peat soil properties on sediment erosion and settling, peat soil samples were collected from 9 peat extraction areas. These samples were used to prepare sediments in laboratory setting. Cohesive strength meter (CSM) was applied to measure the τcr and settling velocity in laboratory and in-situ conditions. Results were compared against physical properties of sediment or peat soils and further compared against different peatland uses. The critical shear stress over all samples ranged from 0.0057 to 0.428 N m⁻² (mean value 0.116 ± 0.07 N m⁻²). τcr in peatland forestry ditches ranged from 0.0057 to 0.428 N m⁻² (mean value 0.07 ± 0.1 N m⁻²), and in peat extraction sites from 0.006 to 0.421 N m⁻² (mean value 0.12 ± 0.06 N m⁻²). Similarly, τcr of artificially prepared samples from peat extraction area ranged from 0.012 to 0.112 N m⁻² (mean value of 0.059 ± 0.028 N m⁻²). At Koivupuro peatland forestry site, measurements were done in laboratory as well as in-situ. Results gave slightly different values; in-situ τcr ranged from 0.005 to 0.305 N m⁻² with the mean value of 0.03 ± 0.075 N m⁻², and the laboratory results ranged from 0.008 to 0.310 N m⁻² with the mean value of 0.125 ± 0.06 N m⁻². Degree of humification (DOH) and dry bulk density were found to be positively related to critical shear stress. The settling velocity results for Koivupuro catchment ranged from 0.0004 to 0.131 m h⁻¹ (mean value 0.016 ± 0.034 m h⁻¹) and 0.0004 to 0.456 m h⁻¹ (mean value 0.144 ± 0.134 m h⁻¹) for other organic peat samples. Degree of humification (DOH) and settling velocity showed no correlation while dry density of settled sediment was found inversely proportional to settling velocity. This study showed that CSM can be used to determine τcr and settling velocity from organic sediment samples. Results can be applied in modelling purposes, and in dimensioning of water protection methods such as settling basins. Eleven rainfall-runoff events from two different catchments were selected for the study to simulate runoff hydrographs and associated sediment yields in different conditions. When properly calibrated for each event, KINEROS2 model produced sufficient estimations of runoff hydrographs for peatland forestry and peat extraction sites but failed to produce reliable estimations of suspended sediment yields. Moreover, unrealistic parameter values sometimes had to be used in model calibration due to model inability to simulate groundwater or soil water response in ditch flow. Thus the model could not be validated for varying initial conditions and rainfall events.
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Kaneko, Yoshio. "Modelling of shear-off failure of concrete : fracture mechanics approach." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13200.

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Reyes, Olivia Maria Lei. "Experimental study and analytical modelling of compressive fracture in brittle materials." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13869.

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Dar, Maital. "Modelling the performance of revenue management systems in different competitive environments." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35119.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.
Includes bibliographical references (p. 124-129).
In the wake of contemporary widespread fare simplification in many major airline markets, this thesis is concerned with the possibilities and the potential for airline revenue management in less-differentiated fare environments. Traditional revenue management has relied upon the assumption that independent demands exist for different fare class products, and can be forecast as such. However, in less-differentiated fare environments this assumption has been shown to lead to "spiral-down" in revenues. Hence, in this thesis, seat inventory control methods are simulated in less-differentiated fare environments and their relative performances are compared. The methods tested are: EMSRb-based Fare Class Yield Management (FCYM); Heuristic Bid Price (HBP); Displacement Adjusted Virtual Nesting (DAVN); and Probabilistic Bid Price (ProBP). Each of the methods is tested in conjunction with two different demand forecasting philosophies: the traditional pickup (or moving average) forecaster which is based on the assumption of independent demands; and a hybrid forecasting method based on the notion that there is one demand for flexible products and another demand for the cheapest product. The methods are simulated in two different competitive airline network environments: a symmetric network with simplified fares; and a more complex non-symmetric network with mixed fare structures. Simulation shows that the performance of all four revenue management methods suffers in less-differentiated fare environments if they continue to use traditional forecasting. Methods that forecast demand at the path level see inflated forecasts for more expensive products, leading them to reject too much lower-class demand; methods that forecast demand at the leg level see diminished forecasts for the more expensive products, leading them to accept too much lower-class demand. The efficacy of FCYM improves in less-differentiated fare environments, providing a gain of about 19% over "First Come First Served" revenues (as compared to the 6% gains seen previously), nevertheless, fare product simplification still results in overall network revenue losses of around 16%. Incremental gains from O-D control when using traditional forecasting range from 0.44% to 1.93%.o over FCYM. In contrast, when the new hybrid forecaster is used, revenue management performance improves significantly, and all methods provide larger revenue gains in all competitive network environments. Revenues under FCYM are now 1.7-2.6% higher than when traditional forecasting is used. When using hybrid forecasting, the incremental gains from O-D control now range from 2.6% to 4% over FCYM.
by Maital Dar.
S.M.
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Bruchmuller, Jorn. "Modelling the degradation of particles in fluidised beds." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/333308/.

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This thesis focuses on modelling the degradation of particles in gas-solid fluidised beds. Modelling is performed by using a coupled approach where the gas phase is treated as a continuum and the solid phase is represented by individual discrete particles, using the discrete element method (DEM). This approach makes it possible to access individual particle properties. By implementing new modelling techniques into the DEM framework, the individual particle degradation behaviour can be numerically described with high accuracy. The main interest is to understand more complex gas-solid systems as encountered e.g. in fluidised beds which might contain numerous degrading particles. This work focuses on verifying and validating these sub-models to be able to obtain accurate information for further suggestions in operation and optimisation of dense particulate systems. Particle degradation is studied by means of thermophysical, thermochemical and mechanical aspects. Drying (thermophysical) is an energy intensive process which makes further research inevitable for further optimisation. Large particles during drying develop temperature and species gradients along their radius, affecting the product quality. The DEM has been used to monitor flow, particle and subparticle properties which have been found useful to control, operate and optimise such large particle drying processes. Pyrolytic (thermochemical) conversion of biomass in fluidised beds represents a promising route for the production of biooil. This process has been modelled and studied under consideration of drying, shrinkage, segregation and entrainment. Breakage or mechanical degradation is often encountered in engineering applications and requires a much better process understanding. Therefore, a new discrete fragmentation method (DFM) has been developed to study breakage in dense particle systems such as fluidised beds but also mills or crushers. Much reliable breakage information can be obtained to further optimise such systems.
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Angeles, Justin Victor V. (Justin Victor Velayo). "Water quality modelling for recreational use in the Kallang River Basin, Singapore." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90006.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 42-45).
Singapore's Active, Beautiful, and Clean Waters Programme (ABC) aims to provide functional use of its water bodies to the public. The Kallang River Basin, being part of the ABC Programme, will be used for recreational purposes such as dragon boating and other water sports. In order to provide safe recreational use for the public, the water quality of the Kallang River Basin needed to be determined and modeled. The water quality indicator chosen to be analyzed was Escherichia coli (E. coli) bacteria. A heuristic study was performed in order to determine the water quality and as well determine if water quality modeling was feasible for the Kallang River Basin. The study employed the United States Environmental Protection Agency WASP (Water Quality Analysis Simulation Program) model. Through WASP model simulations, it was found that certain parts of the Kallang River Basin were not suitable for recreational purposes and others parts were deemed suitable. E. coli concentrations predicted by the model were within the range of actual field data but diurnal variations were not captured by the model for lack of data with which to specify diurnally varying inputs. The WASP model created by this study suggests that water quality modeling for the Kallang River Basin is feasible but there are modifications that need to be made to accurately capture diurnal variations experienced by the Kallang River Basin. Future investigation into the diurnal variations would contribute to creating a more complete and accurate model for the Kallang River Basin.
by Justin Victor V. Angeles.
M. Eng.
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Books on the topic "090702 Environmental Engineering Modelling"

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Piero, Melli, and Zannetti P, eds. Environmental modelling. Southampton: Computational Mechanics Publications, 1992.

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Krause, Paul, and Fatos Xhafa, eds. IoT-based Intelligent Modelling for Environmental and Ecological Engineering. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71172-6.

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F, Krapivin V., and Phillips Gary W. 1940-, eds. Global environmental change: Modelling and monitoring. Berlin: Springer, 2002.

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A, Falconer R., Shion K, and Matthew R. G. S, eds. Hydraulic and environmental modelling: Proceedings of the Second International Conference on Hydraulic and Environmental Modelling of Coastal, Estuarine, and River Waters. Aldershot, Hants, UK: Ashgate, 1992.

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Madsen, Bjarne. Modelling the Economy and the Environment. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996.

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Vinnem, Jan Erik. Offshore Risk Assessment: Principles, Modelling and Applications of QRA Studies. Dordrecht: Springer Netherlands, 1999.

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Benedini, Marcello. Water Quality Modelling for Rivers and Streams. Dordrecht: Springer Netherlands, 2013.

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International, Conference on Physical Modelling in Geotechnics (2002 St Johns N. F. ). Physical modelling in geotechnics: ICPMG '02 : proceedings of the International Conference on Physical Modelling in Geotechnics/ICPGM '02, St. John's, New Foundland, Canada, 10-12 July 2002. Lisse: Balkema, 2002.

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R, Rajar, and Brebbia C. A, eds. Water pollution IV: Modelling, measuring, and prediction. Southampton, UK: Computational Mechanics Publications, 1997.

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al-Majīd, ʻIṣām Muḥammad ʻAbd. Modeling methods for environmental engineers. Boca Raton: Lewis Publishers, 1996.

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Book chapters on the topic "090702 Environmental Engineering Modelling"

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Awange, Joseph L. "Mathematical Modelling." In Environmental Science and Engineering, 41–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-88256-5_4.

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Hoffman, Szymon. "Regression Modelling of Ground Level Ozone Concentration." In Environmental Engineering Studies, 53–60. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8949-9_6.

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Markiewicz, Maria T. "Computer Modelling of Diffusion of Chemically Reactive Pollutants in The Atmosphere." In Environmental Engineering Studies, 61–68. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8949-9_7.

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Shalabh and Subhra Sankar Dhar. "Statistical Modelling and Variable Selection in Climate Science." In Environmental Science and Engineering, 351–78. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32463-6_18.

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van Zijl, George M., Johan J. van Tol, and Eddie S. Riddell. "Digital Soil Mapping for Hydrological Modelling." In Springer Environmental Science and Engineering, 115–29. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0415-5_10.

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Olsińska, Urszula. "Modelling of Bromate Formation in Relation to Hydrodynamic Characteristics Of Ozone Contactors." In Environmental Engineering Studies, 109–19. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8949-9_12.

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Skrzypski, Jerzy. "Analysis and Modelling of the System of air Pollution Concentration Fields In Big Cities." In Environmental Engineering Studies, 69–78. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8949-9_8.

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Teng, Jidong, Feng Shan, Sheng Zhang, and Daichao Sheng. "Numerical Modelling of Vapour-Ice Desublimation Process in Unsaturated Freezing Soils." In Environmental Science and Engineering, 560–68. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2221-1_61.

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Dłuska, Ewa, and Stanisław Wroński. "Mass Transfer Modelling in the Couette-Taylor Flow Reactor for the Oxidation Process of Organic Contaminants." In Environmental Engineering Studies, 43–52. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8949-9_5.

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Yu, Xingji, Shi You, Hanmin Cai, Laurent Georges, and Peder Bacher. "Data-Driven Modelling and Optimal Control of Domestic Electric Water Heaters for Demand Response." In Environmental Science and Engineering, 77–86. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9528-4_9.

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Conference papers on the topic "090702 Environmental Engineering Modelling"

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Bazilo, Constantine, Alvydas Zagorskis, Oleg Petrishchev, Yulia Bondarenko, Vasyl Zaika, and Yulia Petrushko. "Modelling of Piezoelectric Transducers for Environmental Monitoring." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.008.

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World Health Organization (WHO) defined health as being “a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity”. Physical factors (noise, vibration, electromagnetic fields, ionized radiation, etc.) may have a negative influence on both the environment and the health of population. Piezoelectric sensors have been employed in different fields such as medical analysis, environmental monitoring, etc. The object of the research is piezoelectric sensors for environmental monitoring and their simulation. Currently, there are no reliable and valid methods of constructing of mathematical models of piezoelectric transducers, which could be used as a theoretical basis for calculating characteristics and parameters of this class of functional elements of modern piezoelectronics. In most papers the described methods of transformers simulation are mostly based on the use of equivalent electrical circuits and it does not allow analysing stress-strain state of solids with piezoelectric effects. The final goal of mathematical modelling of vibrating piezoelectric elements is a qualitative and quantitative description of characteristics and parameters of existing electrical and elastic fields. Physical processes in piezoelectric transducers which occur using axially symmetric radial oscillations of piezoceramic disk are considered.
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Bobkowska, Katarzyna, Jakub Szulwic, Paweł Tysiac, and Patryk Ziółkowski. "GIS three-dimensional Modelling with geo-informatics techniques." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.167.

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The integration issue of virtual models and geo-referenced database have a very broad spectrum of potential applications. Before the integration issue was on the cusp, it was quite problematic to combine three-dimensional models with the geo-referenced database. An integrated database contains a variety of data including such as object orientated data model and raster data. Within this paper, authors present an integration process aiming to make real virtual GIS database which includes the creation of structures, such as bridges, buildings, roads and terrain formations. To create a three-dimensional GIS model high-resolution satellite images/point cloud has been used. For 3D modelling and reconstruction purposes, The Blender program has been used since the software provides with quick workflow and userfriendly interface. As a result of this study authors concede that integrated techniques for three-dimensional GIS databases allow conducting easy as well as sophisticated operation in an efficient and non-time consuming way. The subject holds great promise for a future, current challenges focusing on new approaches for conjectures of spatial objects that will be used to boost the capabilities for automatic visualization.
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Seniūnaitė, Jurgita, Rasa Vaiškūnaitė, and Kristina Bazienė. "Mathematical Modelling for Copper and Lead Adsorption on Coffee Grounds." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.007.

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Research studies on the adsorption kinetics are conducted in order to determine the absorption time of heavy metals on coffee grounds from liquid. The models of adsorption kinetics and adsorption diffusion are based on mathe-matical models (Cho et al. 2005). The adsorption kinetics can provide information on the mechanisms occurring be-tween adsorbates and adsorbents and give an understanding of the adsorption process. In the mathematical modelling of processes, Lagergren’s pseudo-first- and pseudo-second-order kinetics and the intra-particle diffusion models are usually applied. The mathematical modelling has shown that the kinetics of the adsorption process of heavy metals (copper (Cu) and lead (Pb)) is more appropriately described by the Lagergren’s pseudo-second-order kinetic model. The kinetic constants (k2Cu = 0.117; k2Pb = 0,037 min−1) and the sorption process speed (k2qeCu = 0.0058–0.4975; k2qePb = 0.021–0.1661 mg/g per min) were calculated. After completing the mathematical modelling it was calculated that the Langmuir isotherm better reflects the sorption processes of copper (Cu) (R2 = 0.950), whilst the Freundlich isotherm – the sorption processes of lead (Pb) (R2 = 0.925). The difference between the mathematically modelled and experimen-tally obtained sorption capacities for removal of heavy metals on coffee grounds from aqueous solutions is 0.059–0.164 mg/l for copper and 0.004–0.285 mg/l for lead. Residual concentrations of metals in a solution showed difference of 1.01 and 0.96 mg/l, respectively.
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Beria, Paolo, and Rasa Ušpalytė-Vitkūnienė. "Transport Modelling During Preparation of General Plans in Big Cities: Reasons and Challenges." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.099.

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Rapidly growing mobility of people in European cities attaches greater importance to the sustainable development concept. The dynamics of European cities are however different. Cites such as Lithuanian, Slovakian and Polish ones will rapidly increase traffic flows and car ownership at fast pace. Also in most of Western Europe, even if at lower rates, private mobility is increasing. In some cities, however, car use and car ownership are finally decreasing, also thanks to policies implemented. Of course, an increase of traffic flows poses problems in terms of street space, pollution and liveability of cities. Sustainable integration of all kinds of transport into the urban development process is one of the most effective actions in the hands of city planners. The coordination between the planning of residential and business development areas and the expansion of public transport and its hierarchical integration is however a difficult but necessary exercise. Transport modelling tools, in particular, need important advancements to integrate transport and land use in simulations. This article analyses the main challenges in the use of transport models to support the construction of city plans by means of two case studies of Milan and Vilnius. The analysis deals both with traditional aspects, such as the proper simulation of multimodal choices, the level of detail of zoning, the issues associated to the simulation of traffic management policies. Then, we will focus on two aspects still open: the integration of transport modelling and economic assessment or ranking of actions, and the inclusion of land use changes in the modelling.
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Sokáč, Marek, and Marta Jerković. "Modelling of Combined Sewer Overflow Impacts on the Receiving Water Quality: Case Studies Hron and Drava." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.089.

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Paper analyses the influences of combined sewer overflows (CSO’s), on the receiving water quality, but generally deals also with various types of storm water management in urban areas. The first case study analyses the impacts of the continuous (wastewater treatment plant in the town Osijek) and discontinuous pollution sources (CSO’s in the town Osijek) on the quality of the receiving water – the Drava river (Croatia). The second modelling case study was performed on the river Hron (Slovak republic). In this study, the impacts on the water quality from combined sewer overflows form the biggest town on Hron River – Banská Bystrica were studied, as well as four feasible alternatives of storm sewer management (different mixing ratio, different size of storm tanks) were analysed. For both case studies, the mathematical simulation model MIKE11 (Danish Hydraulic Institute, DHI) was used.
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Jaworski, Maciej, Ryszard Wnuk, Małgorzata Cieślak, and Bogna Goetzendorf-Grabowska. "Experimental Investigation and Mathematical Modelling of Thermal Performance Characteristics of Textiles Incorporating Phase Change Materials (PCMs)." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.260.

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Impregnation of textiles (fabrics) by phase change materials (PCMs) changes their thermal properties. High thermal capacity of PCMs, due to large enthalpy of phase change (latent heat), increases the potential of these materials for heat accumulation, but also modifies heat transfer in transient states what improves their insulating characteristics. The paper presents selected results of both experimental and theoretical investigation of the thermal behavior of textiles impregnated with phase change materials, PCMs, under variable thermal loads. Thermal capacity of textiles containing different amounts of microencapsulated PCM were measured with DSC. Then, their thermal behavior characteristics were investigated under irradiation from a solar simulator (heating phase) and during cooling in the regime of natural convection. Mathematical model of heat transfer in the textiles, including radiative and convective boundary conditions, was formulated. Computer simulations of the processes under study, validated on the base of experimental results, allowed to determine important properties of the textiles, such as coefficients of absorption and transmission for solar radiation. Overall thermal characteristics of the textiles, i.e. temperature variations under different thermal loads, are also presented in the paper.
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Abbas, Y. "Environmental Modelling and Simulation for Naval Ships." In 14th International Naval Engineering Conference and Exhibition. IMarEST, 2018. http://dx.doi.org/10.24868/issn.2515-818x.2018.048.

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The existing HVAC system on board Landing Platform Docks (LPD)s, has been designed to operate in mild tropical environmental conditions such as the Mediterranean. This means that when the ship operates in extreme hot climates such as the Arabian Gulf and the Red sea region, the HVAC system is over loaded and cannot maintain the required design conditions. This results in uncomfortable and difficult working conditions for the ship’s occupants, and causes problems with equipment overheating, and overloading of cooling plants. In order to assess options for improving the HVAC system, an environmental model that is capable of dynamically simulating the environment inside the ship is created. The model takes into account weather data based on ship location and time, ship structure and insulation, sun location and shading effects, internal heat gains from equipment and people, and the performance of the HVAC systems; which includes chillers, cooling coils, heaters, controllers, etc. The environmental model is used to assess options for improving the HVAC system to accommodate extreme tropical conditions. The model also forms an environmental baseline for the ship that can be used for assessing the impact of any change in the operational profile of the ship.
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Astrauskas, Tomas, and Raimondas Grubliauskas. "Modelling of Incident Wave Sound Absorption Coefficient of Paper Sludge Panels." In 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.820.

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Paper sludge is the water treatment waste, which produced during paper production. Paper sludge (PS) waste utilization is the common problem in the EU and internationally. According to authors Frías et al. paper sludge is the main waste in the paper processing factories, the percentage reach 35% of product volume. According to the waste management directive No. 2008/98/EC, paper sludge waste should not be utilised in landfills. Such legislation generates the motivation of this study. This study deals with paper sludge as sound absorbing material. In this paper panels made of paper sludge is studied. Sound absorption coefficient of the panels predicted with Horoshenkov and Swift acoustic model for granular media. The aim of this paper is to predict sound absorption coefficient using non-acoustic parameters of the material.
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Forsyth, Henry, Andy Laws, and A. Taleb Bendiab. "Evolutionary Environmental Modelling in Self-Managing Software Systems." In 2011 Developments in E-systems Engineering (DeSE). IEEE, 2011. http://dx.doi.org/10.1109/dese.2011.109.

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Zelenakova, Martina, Vlasta Ondrejka Harbulakova, Pavol Purcz, and Martina Rehankova. "Water quality modelling in river station Krasny Brod." In The 9th International Conference "Environmental Engineering 2014". Vilnius, Lithuania: Vilnius Gediminas Technical University Press “Technika” 2014, 2014. http://dx.doi.org/10.3846/enviro.2014.102.

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