Research Topics: Environment Engineering

Scaling modeling in environmental hydraulics

General Information Truly, according to the National Research Council of Canada that such environmental hydraulics involves the examination of ample physical, chemical and biological attributes of flowing water, with the objective of protecting and enhancing the quality of the environment that amiably includes such welfare of the public. Thus, for instance, some range of services in the field of Environmental hydraulics are being offered by Canadian Hydraulics Center (CHC). Aside, the services originated and now complement CHC’s traditional expertise in the areas of coastal engineering and cold regions technology, with the increasing need for environmental assessments and consideration for environmental protection and remediation so, the CHC has developed and expanded their technical expertise and tools to provide practical solutions for range of complex environmental problems. ( 2007)         Conversely, utilizing sophisticated numerical models and in some cases physical models, CHC examines the nature of environmental hydraulics problems and develops potential solutions. Model results are communicated in an intuitive manner with the aid of state-of-the-art graphics and animations, thereby facilitating understanding to non-technical stakeholders and the general public. (2007) Then, Environmental hydraulics management can include the following points: (2007) -      coastal ecosystem management -      river and watershed management -      flood management and dam break -      chemical and oil spill migration -      water quality and pollutant transport -      sediment transport including shoreline erosion and dredged spoil disposal -      aquaculture management -      environmental information and simulation systems   Amicably, some research about Environmental Hydraulics covers such aspects of water flow in the environment, as well as the interaction of water and gases in soils and other porous media.  Water is fundamental to life and understanding its behavior in rivers, seas, in the ground and in various treatment processes is central to civilization. Similarly, the interaction of gases, particularly oxygen and carbon dioxide, with water and biological factors is central to the changes encompassed by range of environmental processes such as composting.  The diverse range of projects included in this section have in common that they focus on the basic science of the processes, linked to highly specific application areas within Environmental Engineering.  In addition, ‘such hydraulic systems and components are an essential part of the industrial process. However, they have continuous slow leak in order to lubricate the seals and there is natural wastage of potentially toxic lubricant. In addition, installing and servicing hydraulic systems can result in major leakages, the majority of which simply filters into the ground, perhaps causing serious environmental damage. Water hydraulic systems then, provide the advantages of traditional hydraulics including high power density and precise control but without the pollution and fire risks that are often associated with oil media’ (1996)   Ideally, scale modeling in environmental hydraulics is essential to achieve exact process of certain measurements involved in such issues and concerns such relating to environmental hydraulics problems  such as with application to oil spill modeling. There can be such presence of MacViro having strong track record of successful projects to build on, including the award-winning Airport Road reservoir and pump station which EHG contributed reservoir diffuser and baffling design as well as its signature service: hydraulic transient analysis as the scale models that is for intakes, plants, reactors/contactors and outfalls. Moreover, certain scale models are a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as guide to making the object in full size. Scale models are built or collected for many reasons. For engineers who require scale models to test the likely performance of particular design at an early stage of development without incurring the full expense of full-sized prototype.             Whereas hydrodynamic and morphological processes covering large areas used to be examined exclusively by means of large scale models including small-scale simulated bottom materials or not, the use of these models is now restricted to studying local current and erosion problems due to the high expenses involved and the major capabilities of numerical models.               Nevertheless, the Hydraulic Laboratory still has tides outline model of the Western Scheldt and Sea Scheldt, by means of which orientation research is conducted concerning maintenance, dredge dump sites, access channels, calibration and normalization works. The study of improving the navigability of the Zaire River maritime reach was conducted with the aid of a scale model. Current speeds are measured either photographically or by means of a digital video camera, for which the Hydraulic Laboratory partially has its own software used for processing series of stored images into speed vectors. The Hydraulic Laboratory also gained much experience in the field of shore and port hydraulics conducting research with the aid of scale models. Besides the earlier hydrodynamic and morphological studies of the Zeebrugge outport extension, wave research into shore protection and stability of piers is now mainly still being conducted on scale models. Furthermore, the installation can generate computer-aided regular or irregular wave patterns besides, the vertical tides, waves from several directions can be generated in the wave tank and longitudinal flow can also be simulated.           SAMPLE PROJECT Tides outline model of the River Scheldt   The main section of this hall is taken up by a coloured scale model. As distinct from the grey model, this coloured scale model uses a much larger scale and it can therefore simulate a part of the River Scheldt 40 kilometres long. On your left-hand side lies the border near the Hansweert bend on Dutch territory. At the very end of the hall to your right-hand side lies Antwerp centre. This scale model that represents the River Scheldt and its tributaries subject to tidal influences from the Hansweert bend on Dutch territory is a so-called ‘tides outline model’. This type of model can simulate the infiltration of the tide from the North Sea into the River Scheldt. Because at different points in the scale model the course of the water level can be measured in time, one can the study the influence of dredging in the River Scheldt on the tides. Note that a tide of 12 ½ hours in reality takes only 18 minutes with this scale model because of the scale rules.             The first version of this tides outline model of the River Scheldt was already built in the thirties. In this fourth and last version different locations of the Deurganck Dock were also studied. The aim of the research was to cause as little possible disturbance to the flow in the River Scheldt without access to the dock for ships being impossible. Another study was the EastWest West Scheldt de-poldering project, where the effect of de-poldering on the flow and maintenance dredging was investigated.  By replacing the fixed bed in the scale model by movable material, bed changes resulting from infrastructure works can also be examined. Again because of the scale laws no natural sand is used, but a material that is much lighter and has a larger grain size. Mother-of-pearl (ground button) is an example of this, as are polystyrene grains. An example of such an investigation is the crossing of a pipeline with the navigation channel in the West Scheldt. On the basis of physical modelling a prediction was made of the expected erosion around a cofferdam in the middle of the River Scheldt. Credit:ivythesis.typepad.com

Scaling modeling in environmental hydraulics

General Information Truly, according to the National Research Council of Canada that such e nvironmental hydraulics involves the ...