45 research outputs found

    Utilization, planning, and problem evaluations of urban arterial waterways and corridors as an urban resource.

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    Widespread concern about flooding and possible use of the nation's urban river corridors has generated unprecedented interest in the potential for utilization of urban riverine corridors while simultaneously protecting the environment. This research effort is directed toward the development of a conceptualized plan to utilize the arterial waterways and intermittent streams as a resource and an asset to the community, so that existing problem areas can be economically transferred into useful and feasible activity centers. Flooding problems and methods of flood mitigation, both structural and non-structural are presented. Physical effects of certain practices, such as sand mining and its effect upon flooding, sedimentation, river regime changes, erosion and backwater are also presented. A river corridor plan is invoked on the basis of a study of the soil, topography, vegetation, hydrology and cultural features assembled and an array of potential benefits from reclaiming the corridors presented. A multi-purpose, multiple-approach river corridor plan strategy has been developed and general application to riverine corridor areas has been made

    Essays on river mechanics

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    CER94-95-PYJ-3.Presented by the Graduate Students in CE 717 - River Mechanics (Spring, 1995).Instructor: P.Y. Julien.Includes bibliographical references.April 1995

    Channel Form and Processes in a Formerly Glaciated Terrain

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    Despite that many places around the world in general, and North America in particular, were glaciated during the last ice age, relatively little is known about rivers that evolved over these landscapes once they deglaciated. These rivers are commonly categorized as alluvial with a glacial legacy, and often described as plain gravel-bed or sand-bed rivers. Alternatively, they are considered to be bedrock rivers when the glacial deposits were eroded and underlying rock was exposed. However, ignoring the glacial history of these rivers is scientifically wrong and they should be termed semi-alluvial . This work shows that classification is important, not only for scientific accuracy but for river management that must be based on a sound understanding of river form and process. Poor understanding can be costly, leading to wasted resources and inefficient functioning of the river. Two major geomorphologic phases can be discerned in formerly glaciated terrains: 1. Deglaciation which exposed the landscape to erosion when ponded meltwater was abundant and led to outburst flooding. These catastrophic floods cannot occur under the modern climate of southern Ontario. Evidence for glacial lakes is found in lacustrine deposits upstream, and on top of moraines while spillways indicate where glacial lakes drained and carved deep valleys into the subdued terrain. Spillways reveal outburst flooding with boulder lags, terraces, flow scars and possibly mounds and berms away from the modern misfit channel. 2. Postglacial incision and deposition during a single flood event or a single hydrological year. Human disturbance over the past two centuries, includes agriculture, channelization, millponds and weirs. The dissertation has two parallel paradigms in fluvial geomorphology: Which processes are responsible for most geomorphic work that shapes the landscape - catastrophic flood(s) or smallscale erosion and deposition that bit by bit give the channel and valley its present morphology. My work will show that the outburst flooding of Glacial Lake London (paper 1) sets the stage for the postglacial morphology and small-scale processes we see today (paper 2). The third paper attempts to explain these small-scale processes using a 1D hydraulic model that can answer dynamic questions like bankfull discharge, water surface slopes of discharges, and velocity reversal hypothesis

    The Illinois River: Responsible Management for the New Millennium

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    Opening Address / Robert W. Frazee Remarks on the Management of the Illinois River System by the Director of the Illinois Department of Natural Resources / Brent Manning Remarks on the Management of the Illinois River System by the Director of the Illinois Department of Agriculture / Joe Hampton Responsible Management: What Does it Mean? / Richard B. Pierce Featured Speaker / Lt. Governor Corinne Wood The Ecology and Culture of Water / James M. Patchett and Gerould S. Wilhelm Urban Initiatives on the Illinois River: A Chicago Experence of the Challenges and Solutions / Laurene von Klan Upper Mississippi River - Illinois Waterway System Navigation Study: Feasibility Study / Gary Loss Economic Importance of Levee and Drainage Districts / Michael D. Klingner Economic Impact of Agricultural Commodities on the Upper Illinois River / Thomas E. Jennings The Mississippi Beautification and Restoration Project / Chad Pregracke The Illinois Conservation Reserve Enhancement Program / Debbie S. Bruce The Kankakee River Basin Partnership: Conserving the Kankakee River Basin for the Future / R. A. Schultz and J.E. Mick The Mackinaw River Partnership / Terry Giannoni Watershed Management: Illinois River Ecosystem Restoration Studies / Teresa A. Kirkeeng-Kincaid and Bradley E. Thompson Watershed Resources: A View from Corps Headquarters / Jim Johnson Hypoxia: Illinois Assessment with a Brief Perspective on the National Assessment / Derek Winstanley and Edward C. Krug Illinois' Perspective on Total Maximum Daily Loads (TMDLs) / Bruce J. Yurdin Potential Use of Innovative Dredge Technology and Beneficial Use of Sediment for River Restoration / John C. Marlin Why Suspended Solids Will Not Settle and Sediments Will Not Consolidate in Backwater Lakes: A Discussion of Possible Answers / Donald L. Hey Impacts of Levees on Flood Stages and the Benefits of Managed Flood Storage / Gary R. Clark and Robert Dalton Watershed Management: The Big Picture / Major General Phillip R. Anderson Closing Address / Stephen P. HaveraOpe

    1991 Governor's Conference on the Management of the Illinois River System : Third Biennial Conference

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    Opening Address / Robert W. Frazee Perspectives on the future Management of the Illinois River System / Donald R. Vonnahme Management of the Illinois River / James D. Craig Rocki Island District Perspective of the Management of the Illinois River / John R. Brown Freshwater Mussels of the Illinois River: Past, Present, and Future / Kevin S. Cummings Illinois River Fisheries and Wildlife Resources / Mike Conlin Economic Impact of Barge Transportation / Paul D. Soyke --Tourism Resources Along the Illinois River / Martin R. Botkin Interjurisdictional Rivers and Resources- a U.S. Fish and Wildlife Service Perspective / James G. Geiger Physical Changes Due to Navigation in the Upper Mississippi River System / Nani G. Bhowmik Chemical and Biological Monitoring of the Upper Illinois River / Howard W. Essig Sedimet and Water Quality in the Upper Illinois River Basin / Arthur R. Schmidt Overview of the Zebra Mussel Invasion: Biology, Impacts, and Projected Spread / J. Ellen Marsden, Richard E. Sparks, and K. Douglas Blodgett The Illinois Rivers Project / Cindy Bidlack and Robert A. Williams Positive Impacts of the Par-A-Dice on Riverfront Development / Dave Schielein Economic and Tourism Impacts of the Par-A-Dice on the Illinois River / Carole Halicki Recreational Greenways as an Environmental Management Strategy / Richard M. Pietruszka Soil Erosion Control- the 1990 Farm Bill / Thomas J. Krapf Streambank and Habitat Management Strategies Along Illinois River Tributaries / Donald Roseboom, William White, and Randy Sauer Need for a Comprehensive Management Plan for the Illinois River Basin / Misganaw Demissie Riverwatch Network- a Model Volunteer Stewardship Program for Illinois / Patrick Reese Environmental Agenda for Water Quality / Mary A. Ross Environmental Challenge to Illinois Agriculture / Clark W. Bullard Remarks for the 1991 Governor's Conference on Management of the Illinois River System / Lt. Governor Robert Kustra Closing Remarks / Roberta M. ParksOpe

    A gravel-sand bifurcation:a simple model and the stability of the equilibrium states

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    A river bifurcation, can be found in, for instance, a river delta, in braided or anabranching reaches, and in manmade side channels in restored river reaches. Depending on the partitioning of water and sediment over the bifurcating branches, the bifurcation develops toward (a) a stable state with two downstream branches or (b) a state in which the water discharge in one of the branches continues to increase at the expense of the other branch (Wang et al., 1995). This may lead to excessive deposition in the latter branch that eventually silts up. For navigation, flood safety, and river restoration purposes, it is important to assess and develop tools to predict such long-term behavior of the bifurcation. A first and highly schematized one-dimensional model describing (the development towards) the equilibrium states of two bifurcating branches was developed by Wang et al (1995). The use of a one-dimensional model implies the need for a nodal point relation that describes the partitioning of sediment over the bifurcating branches. Wang et al (1995) introduce a nodal point relation as a function of the partitioning of the water discharge. They simplify their nodal point relation to the following form: s*=q*k , where s* denotes the ratio of the sediment discharges per unit width in the bifurcating branches, q* denotes the ratio of the water discharges per unit width in the bifurcating branches, and k is a constant. The Wang et al. (1995) model is limited to conditions with unisize sediment and application of the Engelund & Hansen (1967) sediment transport relation. They assume the same constant base level for the two bifurcating branches, and constant water and sediment discharges in the upstream channel. A mathematical stability analysis is conducted to predict the stability of the equilibrium states. Depending on the exponent k they find a stable equilibrium state with two downstream branches or a stable state with one branch only (i.e. the other branch has silted up). Here we extend the Wang et al. (1995) model to conditions with gravel and sand and study the stability of the equilibrium states

    Modelling flash flood using LiDAR and high resolution satellite imagery: a case study of West Creek, Toowoomba

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    Australia is one of the most heavily exposed countries in the world to different natural hazards, such as floods. In December 2010 and January 2011, large areas of the south and central Queensland were affected by flooding. On Monday 10th January 2011 heavy rains continued from 12:30 pm to 2:00 pm in the City of Toowoomba catchment area. Flash flooding occurred suddenly and unexpectedly making it difficult to prevent or predict before it occurred. This led to a rise in water levels in streets and roads, disrupting traffic and causing loss of life and properties. To reduce the effect of flood disasters and minimize the damages, flood inundation maps can be used to determine the locations of threat. This research used an integration of the HEC-Hydrologic Modelling System (HEC-HMS), HEC-River Analysis System (HEC-RAS) with Geographic Information Systems (GIS) to develop an improved model of the West Creek flood extent and flood event in the city of Toowoomba. The flood extent and depth in the different flow conditions of the West Creek channel was described in this study. The Hydrologic model (HEC-HMS) was used for 15 minutes time series data to create the flow rate at West Creek catchment from 12:00 pm to 4:00 pm. HEC-RAS with HEC-GeoRAS extension in ArcGIS was applied to simulate the flash flood in West Creek from Spring Street to Long Street. Digital Elevation Model (DEM) derived from high density LiDAR data and land cover data extracted from high resolution remote sensing imagery were used to model the flood inundation in the study area. The HEC-GeoRAS extension was used to prepare data sets for the stream centreline, banks, flow paths and cross-sections for import to the HEC-RAS hydraulic model. The downstream boundary conditions were defined in HEC-RAS. The hydrological results from HEC-HMS showed the maximum discharge value of West Creek Catchment at different periods of time. These results were comparable with Toowoomba Regional Council Report (TRCR). The flood inundation maps showed the maximum flood width and depth of West Creek Channel (starting from Spring Street and ending at Long Street) at 1:00 pm to 3:00 pm, which was greater than any previous floods in Toowoomba. The validation between the modelled flood extent at peak time and flood extent in the Nearmap aerial photo showed a high degree of correlation. Therefore, the model can provide a sound basis on which to analyse similar scenarios

    Proceedings of the Sixth Hydraulics Conference

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    https://ir.uiowa.edu/uisie/1036/thumbnail.jp

    The First Half Century of Hydraulic Research at the University of Iowa, 1971

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    In order to make available the results of all research conducted at the Iowa Institute of Hydraulic Research, a series of bulletins containing abstracts of graduate theses, reviews of Institute research and lists of staff publications has been published at irregular intervals. Previous titles in this series, a part of the Iowa Studies in Engineering, have been Bulletin 19, Two Decades of Hydraulics at the University of Iowa ( 1939); Bulletin 26, Investigations of the Iowa Institute of Hydraulic Research, 1939-1940; Bulletin 30, The Iowa Institute of Hydraulic Research, 1946; Bulletin 33, Third Decade of Hydraulics at the State University of Iowa ( 1949) with Supplement ( 1952); and Bulletin 40, Fourth Decade of Hydraulics at the State University of Iowa ( 1960) with Supplement ( 1965 ) . The present publication has as its twofold purpose to bring this series up to date with a discussion of the Institute's fifth decade of hydraulic research and to summarize at the half century landmark the entire research picture as collected in all of the graduate theses and staff publications

    2009 International SWAT Conference Conference Proceedings

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