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Kevin R. Hall

Bio: Kevin R. Hall is an academic researcher from University of Guelph. The author has contributed to research in topics: Breakwater & Breaking wave. The author has an hindex of 17, co-authored 66 publications receiving 888 citations. Previous affiliations of Kevin R. Hall include University of Newcastle & Queen's University.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the initiation of motion of consolidated cohesive sediments under a unidirectional flow of clear water was studied in a flume-tunnel capable of providing a bed shear stress up to 26 Pa and a velocity of 3.5 m/s, 3 mm above the bed.
Abstract: The initiation of motion of consolidated cohesive sediments under a unidirectional flow of clear water was studied. Experiments were performed in a flume‐tunnel capable of providing a bed shear stress up to 26 Pa and a velocity of 3.5 m/s, 3 mm above the bed. Samples were prepared in a specially designed press using a carefully controlled consolidation procedure. Critical shear stress and velocity were found to increase with compressive strength, vane shear strength, plasticity index, clay content, and consolidation pressure.

151 citations

DOI
26 Apr 1999
TL;DR: In this article, a number of potential design equations were evaluated by statistical analysis methods and the results showed that the relative submergence, incident wave height and structure crest width were the most important design variables.
Abstract: Submerged rubblemound breakwaters are becoming more popular as a potential alternative to coastal protection measures where a moderate degree of energy transmission is acceptable. Such situations include areas where vegetative shore protection is existing or proposed or in the event that an existing shore protection structure has become damaged or under designed and a method is needed to reduce the incident wave energy. Although there have been previous investigations on the performance of submerged rubblemound breakwaters, there are only a few design equations available to the design engineer. Those available are based on a limited range of input design variables and as a result are insufficient in some cases. Physical model studies were performed at the Queen's University Coastal Engineering Research Laboratory (QUCERL) in Kingston, Canada to assess the performance of submerged rubblemound breakwaters under a wide range of design conditions in twodimensional (2-D) and three-dimensional (3-D) settings. The tests include a number of wide crested structures to provide data where previous investigations have not. The results show that the relative submergence, incident wave height and structure crest width are the most important design variables. A number of potential design equations were evaluated by statistical analysis methods. The proposed design equation fits the 2-D test data well and provides moderate agreement with the 3-D test results. Although physical testing is suggested for all design applications due to the complexity of site specific considerations, the proposed equation does provide a good preliminary design tool for submerged rubblemound breakwaters.

81 citations

Journal ArticleDOI
TL;DR: In this article, the authors studied groundwater recharge and discharge in a gneissic terrain with minimal glacial overburden at a well-instrumented field site adjacent to a 1.2 km section of the Tay River, near Perth, Ontario, Canada.

71 citations

Journal ArticleDOI
TL;DR: In this paper, a non-nominated sorting genetic algorithm (NSGA-II) was used to minimize capital costs, annual pumping energy use, and environmental impacts in WDS design that adheres to hydraulic constraints.
Abstract: Climate change has made environmental impact a factor of growing importance in decision making for municipalities. Increasingly, the environmental impacts of expanding and operating a water distribution system (WDS) are considered alongside the cost and hydraulic design. This paper presents a nondominated sorting genetic algorithm (NSGA-II) that minimizes capital costs, annual pumping energy use, and environmental impacts in WDS design that adheres to hydraulic constraints. A previously developed environmental impact (EI) index is included in the environmental objective function of the optimization program. The EI index normalizes and aggregates multiple environmental measures evaluated with an economic input-output life-cycle assessment (EIO-LCA) model. The EIO-LCA-based NSGA-II was applied to the Anytown network. Annual pumping energy use was found to dominate the EI index while capital cost and the EI index were inversely related, and the annual pumping energy use and the EI index followed a near linea...

57 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors investigated the relationship between the erosional properties of combined mud and sand sediments, and found that adding sand to mud, or vice versa, increases the erosion resistance and reduces the erosion rates when the critical shear stress for erosion is exceeded.

500 citations

Journal ArticleDOI
TL;DR: In this paper, a model for wave transformation on vegetation fields is presented, which includes wave damping and wave breaking over vegetation fields at variable depths, based on a nonlinear formulation of the drag force, either the transformation of monochromatic waves or irregular waves can be modeled considering geometric and physical characteristics of the vegetation field.

490 citations

Journal ArticleDOI
TL;DR: In this paper, all available data on the resistance of topsoils to concentrated flow erosion in terms of channel erodibility (Kc) and critical shear stress (τcr) has been collected together with all soil and environmental properties reported in literature to affect the soil erosion resistance.

457 citations