Browsing by Author "Haralampides, Katy"

Now showing 1 - 10 of 10
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    Culvert design analysis
    (University of New Brunswick, 2005) Jensen, Jason B.; Haralampides, Katy; K., Haralampides
    Both our fresh and salt-water resources have been affected by the development of our growing population and demands. The ability to transfer water across many of these man-made barriers using culverts, in a manner that resembles that of the natural environment, is the driving force behind the development of this report. Culverts would be one of the most common types of structures that transfer water across roads, barriers and obstacles that are not part of the natural environment. This report outlines a methodology developed for the Department of Fisheries and Oceans, using some of the latest technology, software and information available, to determine culvert design characteristics necessary to transfer a peak amount of water that may impact an existing or future structure. The methodology walks through a step-by-step process, acquiring the necessary data to determine the proper culvert design, without having to leave the confines and comfort of the office. The report then outlines the use of the acquired data in determining the design of a culvert system. This developed methodology was finally used in a case study, to verify its effectiveness and to determine the specific requirements for a culvert system at the site-specific location. The result of the developed methodology was a time efficient and a cost effective method in determining necessary culvert design parameters using readily available technology, software and information. The developed methodology was executed to verify a proposed culvert design from the Department of Transportation to the Department of Fisheries and Oceans. The results of this verification, confirmed that the developed methodology was a very powerful tool.
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    Mactaquac Aquatic Ecosystem Study Report Series 2018-033, PRELIMINARY FISH HABITAT AND COMMUNITY ASSESSMENT RELATED TO THE FUTURE OPTIONS OF THE MACTAQUAC GENERATING STATION
    (2018) Wegscheider, Bernhard; Linnansaari, Tommi; Ndong, Mouhamed; Ogilvie, Jae; Schneider, Matthias; Kopecki, Ianina; Dolson-Edge, Rebecca; Samways, Kurt; Haralampides, Katy; Curry, R. Allen
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    Mactaquac Aquatic Ecosystem Study Report Series 2019-070, Observed Suspended Sediment Characteristics of the Saint John River (2018)
    (2019) Hudgins, Jillian; Haralampides, Katy; Dolan, Kiera; Rankin, Keagan; Yamazaki, Gordon
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    River bank erosion along the Nashwaak River
    (University of New Brunswick, 2005) Knorr, Kristin; Haralampides, Katy; K., Haralampides
    River bank erosion is a naturally occurring process wherein the surface material along the edge of the water is removed, entrapped, transported, and deposited down stream. Because of recent development along the Nashwaak River, vegetation has been removed from the banks, resulting in increased river bank erosion rates. Presently permanent engineering structures including riprap and cement walls are being used to prevent erosion, but these methods are not ideal. These permanent structures allow the water to speed up in the original problem area and erode the bank further down stream creating a new problem. At the Nashwaak Village field site five different layers of sediment exist; they including overburden, fine sand, pebble, orange-brown clay, and light grey clay. The clay layers were focused on in this project because they are located where the majority of erosion occurs. Experiments indicated that these layers could experience erosion rates as high as 350 mm/day, although that was uncommon. A combination of riprap, vegetation, and boulder clusters are recommended to minimize erosion and costs and to maximize the environmental benefits of river bank protection.
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    Seasonal and tidal variations of sediment transport patterns in the Saint John Inner Harbour
    (University of New Brunswick, 2012) Melanson, Jeff A.; Haralampides, Katy; Wilson, Bruce
    The Saint John Harbour is located along the Bay of Fundy in southern New Brunswick and serves as the primary outlet for the Saint John River. Sediment movement within the Saint John Harbour is a concern from both an ecological and operational perspective. Seasonal measurements of current velocity and suspended sediment concentration (SSC) have been obtained by deploying two acoustic Doppler current profilers (ADCPs) in the inner harbour. ADCP observations spanned several months and were nearly continuous, thus allowing for an in-depth analysis of meteorological and tidal influences on observed hydrodynamics. A comparative assessment was conducted for spring and neap tides, storm surges, and changes in fluvial input. It was observed at both deployment locations that the intruding salt wedge frequently contained high SSC. The salt wedge is believed to be a major contributor of sediment accretion in the inner harbour, particularly during winter storm surges when river discharge is reduced. The Courtenay Bay Channel was observed to be more sensitive to river level, with only winter storms resulting in a landward average sediment flux. Observations made near Courtenay Bay Channel also suggested the presence of a cross channel flow pattern from an adjacent inter-tidal mudflat. This cross channel flow was only observed during spring freshet conditions and contained high SSC. Hydrodynamic observations from the study were compared with published estuarine theory. Results of the study will help to further define hydrodynamic processes in the Saint John Harbour.
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    Something fishy is going on in Jewetts Creek, NB
    (University of New Brunswick, 2004) Lenahan, Colleen; Haralampides, Katy; K., Haralampides
    Presently there is a hanging culvert at the mouth of Jewetts Creek, a tributary of the St. John River. Hanging culverts occur when the culvert entrance is located too high above the water surface to permit fish entrance. This particular culvert has created a fish migration barrier and the exact effect of the hanging culvert on the fish population in the tributary is unclear. Important fish species in Jewetts Creek include blacknose dace, creek chub, white sucker, Atlantic salmon, and brook trout. The New Brunswick Department of Transportation has proposed a fish passage design that will allow for upstream fish migration in Jewetts Creek. The proposed design is a vertical slot fishway. A model fishway, based on the proposed design, was built in the hydraulics laboratory at the University of New Brunswick. In addition to the proposed fishway design, an alternate design was also tested. Velocity measurements were recorded for different flow rates within the two fishway designs. As well, the water flow path in each setup was recorded using a high speed camera. The velocity distributions and video indicate that the two different designs will satisfy the swimming capabilities of the fish believed to inhabit Jewetts Creek. It has been recommended that further testing be done that would include different fishway designs. If possible, testing of the fishway designs with fish would give the best indication of which fishway setups are the most effective.
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    The green power of blue : a feasibility study for micro tidal generators in the Bay of Fundy
    (University of New Brunswick, 2003) Walker, Jordan; Haralampides, Katy; K., Haralampides
    By harnessing the power of the tides, a virtually unlimited power supply could be attained; the challenge is to do so in an environmentally responsible manner. The purpose of this report was to come up with a recommendation as to how tidal power could feasibly be implemented on a private basis on Canada's east coast. The use of "micro" tidal generators is a fairly recent undertaking, and a number of companies have released products. This report focused on the Gorlov Helical Turbine for free current flows. Based on the Darrieus style of wind turbines, the Gorlov Helical Turbine (GHT) boasts a 35% efficiency in water, and does not have the stability issues associated with the Darrieus turbines. Essentially a raft with a turbine mounted beneath it, the units can be anchored off shore to provide consistent power, with minimal outages during slack tide events. By investigating these slack tide events, a recommendation for such periods can be made. Through an investigation o f the properties of the GHT, and the hydrodynamic properties of the region, an idea of the costs associated for an average homeowner to install and run such a facility were found. To install and run a 30kW private facility in the Minas Basin, the overall cost per kilowatt-hour is roughly $0.05. Since prices for these modules decrease as their numbers increase, the costs associated with a commercial facility drop down to around $0.01 per kilowatt-hour and could thus be determined feasible.