Relevant bibliographies by topics / River channel profiles

Academic literature on the topic 'River channel profiles'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "River channel profiles"

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Kosteniyk, Liudmyla, and Natalia Zablotovska. "FEATURES OF LEVEL PROCESSES ON MOUNTAIN RIVERS WITHIN THE BOUNDARIES OF THE VORKHTO-PUTYL LOW MOUNTAINS (CHEREMOSH BASIN)." SCIENTIFIC ISSUES OF TERNOPIL VOLODYMYR HNATIUK NATIONAL PEDAGOGICAL UNIVERSITY. SERIES: GEOGRAPHY 52, no. 1 (May 30, 2022): 51–59. http://dx.doi.org/10.25128/2519-4577.22.1.7.

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This publication is devoted to the study of the features of channel processes on mountain rivers that cross the Central synclinorium of the Ukrainian Carpathians, namely the region of the Vorokhto-Putilsky low mountains. These are mainly the rivers of the Cheremosh river basin, the hydrographic sources of the Black and White Cheremosh, as well as their small tributaries Iltsa and Richka. It is within the boundaries of this geological and geomorphological region that atypical hollow expansions of the bottoms of river valleys are observed (Zhabeevskaya, Krivopilskaya, Iltsevskaya, Krivorivnesvkaya and Yablunetskaya). According to the data of some researchers, the zone of the Vorokhto-Putyl low mountains is part of an older river runoff, the so-called Yasynya-Cheremoshskaya River, which is fragmentarily represented in the modern orography of the Ukrainian Carpathians and is currently not a homogeneous morphological structure. This old river, during the Pliocene period, had an internal flow into the basin of the Siret River, in the direction of its tributary, the Moldova River. It is in this zone that high terrace levels (VIII, IX) are well preserved, the direction of which does not correspond to modern river valleys. The main feature of the channel processes of the rivers in this particular region is the disproportionate size of the bottoms of their valleys in accordance with the modern dimensions of the channels. The second feature is the predominantly alluvial type of channels with a clearly expressed thick bottom pavement, as well as alluvial forms with well-rounded sediments. An important modern element of modern scientific studies of channel processes is the measurement work in the channel to measure the depths of the river channel and the subsequent construction of the transverse profile of the river in certain key areas. The results of these measurements, as well as the graphs of the transverse profiles themselves, are presented in this paper for the Iltsa, Chorny, and Bely Cheremosh rivers. A brief description of the features of the channel processes in the leveling areas is also given. The obtained results make it possible to more reasonably and accurately analyze the flood zones of these rivers during the passage of floods and spring floods. And also, based on a comparison of the graphs of transverse profiles for different periods, it will be possible to more accurately assess the vertical deformations in different parts of the channels of the studied rivers. Thus, for most riverbeds crossing the Vorokhta-Putilsky terraced lowlands, we see atypical hollow expansions of valley bottoms, which indicate local changes in geological and homorphological conditions in these areas, which in turn affects the formation of alluvial type of channels, with quite a large number of deposits of good run-in. This type of channel is more typical of rivers flowing within the foothills and more reminiscent of the free conditions of channel formation. At the same time, when moving to the area of the Skibov Carpathians, the incised type of channel becomes predominant again. It should also be noted that the development of channel macroforms (incised macro-meanders on the rivers Iltsa, Chorny Cheremosh, Rivers) is observed within this lowland, which indicates a complex hierarchy of channel processes in this geomorphological zone. Prospects for the use of results. The obtained results give the starting material for further, deeper, study and determination of the peculiarities of channel processes on the studied mountain rivers: due to the cross-sections it is possible to calculate the channel-forming water flow at given speeds and water levels; repeated leveling, after a certain period of time, will allow to estimate the intensity of vertical and planned deformations in the surveyed areas; it became possible to determine the zones of flooding during high floods by mathematical (calculation) methods, even in the absence of regular observations at the object of research and to estimate the coefficient of stability of the riverbed. Key words: channel processes, mountain rivers, transverse profile, incised channel, vertical deformations
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Wang, Yizhou, Liran Goren, Dewen Zheng, and Huiping Zhang. "Short communication: Forward and inverse analytic models relating river long profile to tectonic uplift history, assuming a nonlinear slope–erosion dependency." Earth Surface Dynamics 10, no. 4 (August 11, 2022): 833–49. http://dx.doi.org/10.5194/esurf-10-833-2022.

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Abstract. The long profile of rivers is shaped by the tectonic history that acted on the landscape. Faster uplift produces steeper channel segments, and knickpoints form in response to changes in the tectonic uplift rates. However, when the fluvial incision depends non-linearly on the river slope, as commonly expressed with a slope exponent of n≠1, the links between tectonic uplift rates and channel profile are complicated by channel dynamics that consume and form river segments. These non-linear dynamics hinder formal attempts to associate the form of channel profiles with the tectonic uplift history. Here, we derive an analytic model that explores a subset of the emergent non-linear dynamics relating to consuming channel segments and merging knickpoints. We find a criterion for knickpoint preservation and merging, and we develop a forward analytic model that resolves knickpoints and long profile evolution before and after knickpoint merging. We further develop a linear inverse scheme to infer tectonic uplift history from river profiles when all knickpoints are preserved. Application of the inverse scheme is demonstrated over the main trunks of the Dadu River basin that drains portions of the east Tibetan Plateau. The model infers two significant changes in the relative uplift rate history since the late Miocene that are compatible with low-temperature thermochronology. The analytic derivation and associated models provide a new framework to explore the links between tectonic uplift history and river profile evolution when the erosion rate and local slopes are non-linearly related.
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Brayall, M., and F. E. Hicks. "Applicability of 2-D modeling for forecasting ice jam flood levels in the Hay River Delta, Canada." Canadian Journal of Civil Engineering 39, no. 6 (June 2012): 701–12. http://dx.doi.org/10.1139/l2012-056.

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Ice jam floods can present an annual threat to communities adjacent to rivers, especially those situated at river confluences, island or deltas. The objective of this study was to determine whether 2-D modeling might be used to predict expected ice jam flood elevations for such multi-channel systems. The Hay River delta was selected as the demonstration site for this study, and 2-D modeling was employed to calculate ice jam flood levels expected for varying inflow discharge conditions. The River2D model was calibrated for historical ice jam profiles covering a range of discharges from 268 to 1000 m3/s and a relationship was developed to predict the flow split down the East and West Channels based on the inflow discharge to the delta. Also, ice jam rating curves were developed at 0.5 km intervals along each channel facilitating the development of an ice jam profile prediction tool for use by the Town of Hay River.
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Growns, Ivor, Iris Wing Tsoi, Mark Southwell, Sarah Mika, Sam Lewis, and Ben Vincent. "The effects of hydrology on macroinvertebrate traits in river channel and wetland habitats." Aquatic Ecosystem Health & Management 24, no. 4 (October 1, 2021): 93–102. http://dx.doi.org/10.14321/aehm.024.04.12.

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Abstract Increased need for freshwater for human uses from the mid-1900s has severely impacted rivers and floodplain wetlands so that they are some of the most seriously degraded environments in the world. Research and monitoring in this area to date has focused on understanding ‘flow-ecology’ relationships, without investigating the mechanisms underlying them. The use of species traits offers a tool for defining mechanistic connections between biotic responses and environmental conditions. We examined nine macroinvertebrate trait categories in both wetlands and channels to determine whether their profiles responded to hydrology in the Gwydir River system in the northern Murray-Darling Basin, Australia. Trait responses were shown for the wetlands but not the river channels. Twelve traits showed positive relationships with the time the wetlands were connected to their river channels. It is unclear the reason(s) why the river channel invertebrate traits did not respond to hydrology. However, the use of environmental flows in the river systems may be important to other aspects of macroinvertebrate assemblages such as their role in food webs to support higher-order consumers.
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Fares, Y. R. "Transient bottom topography changes in alluvial streams." Canadian Journal of Civil Engineering 27, no. 2 (April 1, 2000): 309–18. http://dx.doi.org/10.1139/l99-063.

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The development of a quasi two-dimensional computational model for simulating the transient variations of bed topography profiles in alluvial river channels is reported. The formulation of the model is based on combining the longitudinal flow momentum with the continuity principle of the sediment bed load. The Engelund-Hansen formula is employed in estimating the total sediment bed load along the reach of a river channel. The lateral bed load contribution from the total load is calculated in the same way as in calculating the lateral secondary currents from the main flow velocities. The numerical scheme and the computational procedure used in the study are described in detail. The simulated bed level profiles are verified through comparisons with experimental and field measurements taken from case studies in the literature for different flow conditions, channel characteristics, and sediment properties. The correlation between flow discharge, bed load, boundary friction, and channel slope is discussed. On the basis of the reasonably good comparisons with field data, it may be deduced that the model can be used for predicting the bottom topography variations in river channels.Key words: meandering rivers, bottom topography, sediment transport, bed load, boundary roughness, field measurements, experimental data, computational modelling, finite difference method.
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Yulistiyanto, Bambang, Bambang Kironoto, Bangun Giarto, Mariatul Kiptiah, and Muhammad Lutfi Tantowi. "The Simplified of Suspended Sediment Measurement Method in Natural River (Case study of Kuning River in Yogyakarta, Indonesia)." Journal of the Civil Engineering Forum 5, no. 3 (September 18, 2019): 243. http://dx.doi.org/10.22146/jcef.47061.

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The accumulation of suspended sediment reduces the capacity in the river and deteriorates the water quality. Kuning River in Yogyakarta is one of the main rivers in Yogyakarta, Indonesia, which is currently facing the issue of suspended sediments. To reduce the effect of suspended sediment and determine a preventive measure, hence, it is necessary to study the characteristics of the suspended sediment flow. Therefore, this study aims to investigate the suspended sediment flow characteristics, i.e. the velocity, and the concentration profiles at specific points in the transverse direction of the channel as well as the correlation of the suspended sediment discharge. Thirty (30) profiles of velocity and suspended sediment concentration were measured at six different points along the Kuning River. Opcon probe was used to measure suspended sediment concentration, while the propeller current meter was used to measure mean point-velocity profiles. Results of this study show the suspended sediment discharge ratio, defined as are higher in the middle part of the channel than the one near the edge of the channel. The position of z/B where the values of 1 occurs at z/B = 0,19 and z/B = 0,75, which depend on the irregularity of the channel cross-sections. For practical purposes, the depth-averaged velocity and suspended sediment concentration can be determined from 1, 2 and/or 3 points measurement at y = 0,2D, 0,4D and 0,8D.
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B. Vishnu, Ardra Wilson. "Evaluation of Morphological Changes in the River Bharathapuzha Using DEM Images." International Journal of Current Microbiology and Applied Sciences 10, no. 12 (December 10, 2021): 304–9. http://dx.doi.org/10.20546/ijcmas.2021.1012.035.

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Rivers have been a subject of study by engineers and scientists who have been fascinated by their self-formed geometric shapes and their responses to changes in nature and human interference. Among various types of human interventions, indiscriminate extraction of sand and gravel is the most disastrous one, as it threatens the very existence of the riverine ecosystem. Bharatapuzha is a great victim of illegal sand mining. The mining activity is particularly very high in the stretch between Pattambi and Kuttippuram of Bharathapuzha river. The study was undertaken to assess the morphological changes utilising DEM imageries. The analysis and assessment of satellite imageries were carried out using the ArcGIS 10.3 software. The Elevation Profile add-in toolbar was utilised to create profile graphs by taking sections across the river course in ArcGIS and the morphological changes of the river were calculated by comparing the cross-section profiles for the time period 2000 to 2014. Profile graphs revealed an average change in river bed depth of 0.25 m and an average change of cross-sectional area of about 134.66 m2. The main cross-sectional changes in the river reach of Kuttippuram to Pattambi were channel deepening and channel widening.
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Kimiaghalam, Navid, Masoud Goharrokhi, and Shawn P. Clark. "Estimating cohesive sediment erosion and deposition rates in wide rivers." Canadian Journal of Civil Engineering 43, no. 2 (February 2016): 164–72. http://dx.doi.org/10.1139/cjce-2015-0361.

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Sediment erosion and deposition rates are two of the most important factors that influence fluvial geomorphology. Several experimental devices have been constructed to estimate cohesive sediment erosion rate. However, estimated erosion rates may not be reliable for large rivers due to limited soil sampling and a high dependency of cohesive sediment behaviour on several physical, mechanical, and electrochemical properties of the sediment and eroding fluid. A new methodology has been developed to estimate the erosion and deposition rate of wide rivers using in situ measurements. To test this methodology, an acoustic Doppler current profiler was used to collect bathymetry and velocity profiles over a study area along the Red River in Winnipeg, Canada. Sediment concentration profiles along an 8.5 km reach of the river were measured several times under different flow conditions. Finally, an advection–dispersion equation was numerically solved using measured and calculated streamwise dispersion coefficients, flow and channel characteristics to calculate net erosion and deposition over the study area. Moreover, an exponential relationship was obtained between the river discharge and longitudinal dispersion coefficient for the Red River.
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Li, Yanyan, Guishan Yang, Bing Li, Rongrong Wan, Weili Duan, and Zheng He. "Quantifying the effects of channel change on the discharge diversion of Jingjiang Three Outlets after the operation of the Three Gorges Dam." Hydrology Research 47, S1 (July 5, 2016): 161–74. http://dx.doi.org/10.2166/nh.2016.016.

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The Jingjiang Three Outlets (JTO) are the water-sediment connecting channels between the Yangtze River and the Dongting Lake. The discharge diversion of the JTO plays a dominant role in the flood control of the middle–lower Yangtze River, Dongting Lake evolution, and ecological environment. After the operation of the Three Gorges Dam (TGD), the river channels downstream experienced dramatic channel changes. To study the influences of the channel change on the discharge diversion, the authors analyzed the channel changes by water level–discharge rating curves and cross-sectional channel profiles in 1980–2014. Hence, changes in the water level with the same discharge and the decline of discharge diversion at the JTO were noted. Channel incision caused the water level with the same discharge to greatly decrease in the upper Jingjiang River. The water level with the same discharge significantly increased at the JTO as a result of the channel deposition. The channel changes contributed approximately 37.74% and 76.36%, respectively, to the amount and ratio of discharge diversion decreases after the TGD operation. The channel changes serve as the primary factor in facilitating the decrease in the discharge diversion ratio, but not the main factor for the decreased amount of the discharge diversion.
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Lawrence, Susan, James Grove, Peter Davies, Jodi Turnbull, Ian Rutherfurd, and Mark Macklin. "Historical dredge mining as a significant anthropomorphic agent in river systems: A case study from south-eastern Australia." Holocene 31, no. 7 (March 25, 2021): 1158–74. http://dx.doi.org/10.1177/09596836211003272.

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Bucket dredging to mine and extract gold and tin from rivers is a global industry that has had a range of negative effects on physical environments. These include the destruction of riparian soil profiles and structures, artificial channel straightening and loss of in-stream biodiversity. In this paper we evaluate the immediate effects and long-term consequences of bucket dredging on rivers in Victoria and New South Wales during the period 1900–1950. High quality historical sources on dredge mining are integrated with geospatial datasets, aerial imagery and geomorphological data to analyse the scale of the dredging industry, evidence for disturbance to river channels and floodplains and current land use in dredged areas. The study demonstrates that the environmental impact of dredging was altered but not reduced by anti-pollution regulations intended to control dredging. An assessment of river condition 70–100 years after dredge mining ceased indicates that floodplains and river channels continue to show the effects of dredging, including bank erosion, sediment slugs, compromised habitat and reduced agricultural productivity. These findings have significant implications for river and floodplain management.
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Dissertations / Theses on the topic "River channel profiles"

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Skinner, Kevin Shaun. "Geomorphological post-project appraisal of river rehabilitation schemes in England." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324063.

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Robert, Andre. "Statistical modelling of sediment bed profiles and bed roughness properties in alluvial channels." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292244.

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Khalil, Kamal. "Water surface profile modelling for Pinjarra flood diversion channel and economic evaluation." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/2455.

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Shire of Murray has concerns regarding the negative impact that a 100 year flood could have on existing structures built before 1997. The increase cost in construction due to landfill has an adverse effect on development in Pinjarra. Feasibility of constructing a diversion channel at upstream of Murray River to attenuate the flood level from 1 in 100 year ARI to 1 in 50 year ARI, was investigated by Kiong (2003). The Murray River Water Surface Profile along three kilometres south of Greenlands Road was modelled. Flood damages on each flood occurrence were assessed and Average Annual Damage (AAD) was calculated. The AAD is used to estimate the monetary benefit against the construction cost of the diversion channel. Groundwater along Greenlands and Fauntleroy Drains was also modelled to determine the viable depth of the designed channel, as well as the analysis of backwater. The proposed channel is designed at different scenarios (invert level at breakout point, culvert or causeway design, and diversion channel variations). The benefit cost ratio of the proposed diversion channel is calculated. Other mitigation options are suggested including detention basins for structural measure, or building a new flood-proof township for non-structural measure.
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Khalil, Kamal. "Water surface profile modelling for Pinjarra flood diversion channel and economic evaluation." Curtin University of Technology, Department of Civil Engineering, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17589.

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Shire of Murray has concerns regarding the negative impact that a 100 year flood could have on existing structures built before 1997. The increase cost in construction due to landfill has an adverse effect on development in Pinjarra. Feasibility of constructing a diversion channel at upstream of Murray River to attenuate the flood level from 1 in 100 year ARI to 1 in 50 year ARI, was investigated by Kiong (2003). The Murray River Water Surface Profile along three kilometres south of Greenlands Road was modelled. Flood damages on each flood occurrence were assessed and Average Annual Damage (AAD) was calculated. The AAD is used to estimate the monetary benefit against the construction cost of the diversion channel. Groundwater along Greenlands and Fauntleroy Drains was also modelled to determine the viable depth of the designed channel, as well as the analysis of backwater. The proposed channel is designed at different scenarios (invert level at breakout point, culvert or causeway design, and diversion channel variations). The benefit cost ratio of the proposed diversion channel is calculated. Other mitigation options are suggested including detention basins for structural measure, or building a new flood-proof township for non-structural measure.
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Persio, Andrew Franklin. "Assessment of changes in the water-surface profile of the lower canyon of the Little Colorado River, Arizona." Thesis, The University of Arizona, 2004. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0124_sip1_w.pdf&type=application/pdf.

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Eddleman, James L. "Elevation, Longitudinal Profile, And Schmidt Hammer Analysis Of Strath Terraces Through Capitol Reef National Park, Utah: Bedrock Channel Response To Climate Forcing?" Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd936.pdf.

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Kriechbaumer, Thomas. "Field-based measurement of hydrodynamics associated with engineered in-channel structures : the example of fish pass assessment." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11315.

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The construction of fish passes has been a longstanding measure to improve river ecosystem status by ensuring the passability of weirs, dams and other in- channel structures for migratory fish. Many fish passes have a low biological effectiveness because of unsuitable hydrodynamic conditions hindering fish to rapidly detect the pass entrance. There has been a need for techniques to quantify the hydrodynamics surrounding fish pass entrances in order to identify those passes that require enhancement and to improve the design of new passes. This PhD thesis presents the development of a methodology for the rapid, spatially continuous quantification of near-pass hydrodynamics in the field. The methodology involves moving-vessel Acoustic Doppler Current Profiler (ADCP) measurements in order to quantify the 3-dimensional water velocity distribution around fish pass entrances. The approach presented in this thesis is novel because it integrates a set of techniques to make ADCP data robust against errors associated with the environmental conditions near engineered in-channel structures. These techniques provide solutions to (i) ADCP compass errors from magnetic interference, (ii) bias in water velocity data caused by spatial flow heterogeneity, (iii) the accurate ADCP positioning in locales with constrained line of sight to navigation satellites, and (iv) the accurate and cost-effective sensor deployment following pre-defined sampling strategies. The effectiveness and transferability of the methodology were evaluated at three fish pass sites covering conditions of low, medium and high discharge. The methodology outputs enabled a detailed quantitative characterisation of the fish pass attraction flow and its interaction with other hydrodynamic features. The outputs are suitable to formulate novel indicators of hydrodynamic fish pass attractiveness and they revealed the need to refine traditional fish pass design guidelines.
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Frank, John Augustine. "The community profile changes of Black River Falls, Wisconsin a mining impacted rural city /." 1985. http://catalog.hathitrust.org/api/volumes/oclc/13309770.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1985.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 223-225).
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Hložek, Martin. "Regionální morfologické rozdíly údolní sítě Jizerských hor." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-305370.

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This Master thesis focuses on a river network characteristics in the Jizerské hory Mts., northern Bohemia. This part of the Czech Republic represents an area, which was during Tertiary and Pleistocene affected by neotectonic movements. Therefore, 30 longitudinal profiles of selected rivers were constructed to determine areas influenced by tectonics most intensively. These profiles were classified into four categories according to shape of profile curve. Also valley cross sections were made on five selected rivers. Additionally, the Jizera and Jizerka rivers were studied to assess changes of their streams in the period of 19382012. On the north-western (the Jeřice river catchment) and northern (the Smědá river catchment) slopes of the Jizerské hory Mts., areas most affected by neotectonic movements were detected. Tectonically controlled valley cross sections are distinctive on the Smědá, Jizera and Kwisa rivers. On the Jizerka and Jizera rivers, lateral erosion rate ranges up to 0,5 m/year.
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Mearce, Trevor. "Along-strike changes in the active tectonic configuration of the northwestern Himalaya: insights from landscape morphology, erosion rates, and river profiles." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8892.

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Geodetic models suggest that much of the convergence across the Himalaya (~20 mm yr-1) is taken up on the Main Himalayan Thrust, the main decollement beneath the Himalayan orogenic wedge. In Central Nepal and the majority of Northwest India, several geomorphic, geophysical and seismological datasets indicate that this decollement has a mid-crustal ramp that continues uninterrupted for hundreds of kilometers along strike from Nepal in the east to Uttarakhand in the west. In this study, I use spatial analyses of elevation, relief, channel steepness indices, and basin-wide erosion rates from cosmogenic 10-Be concentrations to outline a potential large-scale change in the active fault configuration between the Main Himalayan Thrust and Main Boundary Thrust near longitude 77°E in the Northwestern Indian Himalaya. The physiography in the areas to the east of 77ºE appears similar to that observed along much of the Himalaya where topographic relief, erosion rates, and river channel steepness (ksn <200) remain relatively low in the areas to the south of a line known as the Physiographic Transition-2. North of the Physiographic Transition-2, these metrics increase sharply within a 30-km zone due to higher rock uplift rates above a mid-crustal ramp on the decollement or an unidentified out-of-sequence thrust fault that soles to the decollement. Either of these models are perceivable with a duplex growing by underplating of the Indian plate into the Himalayan orogenic wedge contributing to higher rock uplift rates north of the Physiographic Transition-2. To the west of 77ºE, however, the landscape morphology indicates the Main Boundary Thrust makes a northward bend coinciding with the along-strike termination of the Physiographic Transition-2 and an arc-perpendicular Bouguer gravity anomaly reflecting a trough on the Indian plate near longitude 77°E. These data suggest that the Main Boundary Thrust merges along strike with the ramp or with an emergent fault soling into the Main Himalayan Thrust at this location, potentially marking a significant change in tectonic configuration along the Himalayan arc.
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Book chapters on the topic "River channel profiles"

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Sklar, Leonard, and William E. Dietrich. "River longitudinal profiles and bedrock incision models: Stream power and the influence of sediment supply." In Rivers Over Rock: Fluvial Processes in Bedrock Channels, 237–60. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm107p0237.

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Pazzaglia, Frank J., Thomas W. Gardner, and Dorothy J. Merritts. "Bedrock fluvial incision and longitudinal profile development over geologic time scales determined by fluvial terraces." In Rivers Over Rock: Fluvial Processes in Bedrock Channels, 207–35. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm107p0207.

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Tinkler, Keith J., and John Parish. "Recent adjustments to the long profile of Cooksville Creek, an urbanized bedrock channel in Mississauga, Ontario." In Rivers Over Rock: Fluvial Processes in Bedrock Channels, 167–87. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm107p0167.

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Weissel, Jeffrey K., and Michele A. Seidl. "Inland propagation of erosional escarpments and river profile evolution across the southeast Australian passive continental margin." In Rivers Over Rock: Fluvial Processes in Bedrock Channels, 189–206. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm107p0189.

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Howard, Alan D. "Long profile development of bedrock channels: Interaction of weathering, mass wasting, bed erosion, and sediment transport." In Rivers Over Rock: Fluvial Processes in Bedrock Channels, 297–319. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm107p0297.

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Doffo, Nelso C., María Celeste Bonacci, and María Jimena Andreazzini. "Tectonic Influence on Channel Pattern and Longitudinal Profile Concavity in the Middle-Low Reach of the San Bartolome River, Province of Córdoba, Argentina." In Advances in Geomorphology and Quaternary Studies in Argentina, 92–119. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66161-8_5.

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Bialik, Robert J., Mikołaj Karpiński, and Agnieszka Rajwa. "Discharge Measurements in Lowland Rivers: Field Comparison Between an Electromagnetic Open Channel Flow Meter (EOCFM) and an Acoustic Doppler Current Profiler (ADCP)." In Achievements, History and Challenges in Geophysics, 213–22. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07599-0_12.

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"Landscape Influences on Stream Habitats and Biological Assemblages." In Landscape Influences on Stream Habitats and Biological Assemblages, edited by Christian E. Torgersen, Colden V. Baxter, Hiram W. Li, and Bruce A. McIntosh. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569766.ch23.

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<em>Abstract.</em>—Longitudinal analysis of the distribution and abundance of river fishes provides a context-specific characterization of species responses to riverscape heterogeneity. We examined spatially continuous longitudinal profiles (35–70 km) of fish distribution and aquatic habitat (channel gradient, depth, temperature, and water velocity) for three northeastern Oregon rivers. We evaluated spatial patterns of river fishes and habitat using multivariate analysis to compare gradients in fish assemblage structure among rivers and at multiple spatial scales. Spatial structuring of fish assemblages exhibited a generalized pattern of cold- and coolwater fish assemblage zones but was variable within thermal zones, particularly in the warmest river. Landscape context (geographic setting and thermal condition) influenced the observed relationship between species distribution and channel gradient. To evaluate the effect of spatial extent and geographical context on observed assemblage patterns and fish–habitat relationships, we performed multiple ordinations on subsets of our data from varying lengths of each river and compared gradients in assemblage structure within and among rivers. The relative associations of water temperature increased and channel morphology decreased as the spatial scale of analysis increased. The crossover point where both variables explained equal amounts of variation was useful for identifying transitions between cool- and coldwater fish assemblages. Spatially continuous analysis of river fishes and their habitats revealed unexpected ecological patterns and provided a unique perspective on fish distribution that emphasized the importance of habitat heterogeneity and spatial variability in fish–habitat relationships.
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Borghei, S., A. Nazari, and A. Daemi. "Scouring profile at channel junction." In Hydraulics of Dams and River Structures, 327–32. CRC Press, 2004. http://dx.doi.org/10.1201/b16994-46.

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Pagliara, S., M. Palermo, and D. Roy. "Scour profiles downstream of wood structures in vegetated channels." In River Flow 2020, 1645–52. CRC Press, 2020. http://dx.doi.org/10.1201/b22619-231.

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Conference papers on the topic "River channel profiles"

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Koseki, H., A. Yorozuya, S. Kudo, Y. Iwami, and T. Kitsuda. "Development of a system to measure bed forms and vertical velocity profiles in a river channel." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-244.

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Burge, Leif M., Laurence Chaput-Desrochers, and Richard Guthrie. "Practical Applications of Bed Scour Calculations: Two Case Studies." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33744.

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Pipelines can be exposed at water crossings where rivers lower the channel bed. Channel bed scour may cause damage to linear infrastructure such as pipelines by exposing the pipe to the flow of water and sediment. Accurate estimation of depth of scour is therefore critical in limiting damage to infrastructure. Channel bed scour has three main components: (1) general scour, (2) bed degradation, and (3) pool depth. General scour is the temporary lowering of the channel bed during a flood event. Channel bed degradation is the systematic lowering of a channel bed over time. Pool depth is depth of pools below the general bed elevation and includes the relocation of pools that result from river dynamics. Channel degradation is assessed in the field using indicators of channel incision such as channel bed armoring and bank characteristics, through the analysis of long profiles and sediment transport modelling. Pool depth is assessed using long profiles and channel movement over time. The catastrophic nature of bed lowering due to general scour requires a different assessment. A design depth of cover is based on analysis of depth of scour for a given return period (eg. 100-years). There are three main steps to predict general scour: (1) regional flood frequency analysis, (2) estimation of hydraulic variables, and (3) scour depth modelling. Typically, four scour models are employed: Lacey (1930), Blench (1969), Neill (1973), and Zeller (1981), with the average or maximum value used for design depth. We provide herein case studies for potential scour for pipeline water crossings at the Little Smoky River and Joachim Creek, AB. Using the four models above, and an analysis of channel degradation and pool depth, the recommended minimum depth of cover of 0.75 m and 0.142 m, respectively, were prescribed. Variability between scour models is large. The general scour model results varied from 0.45 m and 0.75 m for the Little Smoky River and 0.16 m to 0.51 m for Joachim Creek. While these models are more than 30 years old and do not adequately account for factors such as sediment mobility, they nevertheless do provide usable answers and should form part of the usual toolbox in water crossing scour calculations.
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Guo, Y., D. E. Bullock, I. L. Pioro, and J. Martin. "Measurements of Sheath Temperature Profiles in Bruce LVRF Bundles Under Post-Dryout Heat Transfer Conditions in Freon." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89621.

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An experimental program has been completed to study the behaviour of sheath wall temperatures in the Bruce Power Station Low Void Reactivity Fuel (shortened hereafter to Bruce LVRF) bundles under post-dryout (PDO) heat-transfer conditions. The experiment was conducted with an electrically heated simulator of a string of nine Bruce LVRF bundles, installed in the MR-3 Freon heat transfer loop at the Chalk River Laboratories (CRL), Atomic Energy of Canada Limited (AECL). The loop used Freon R-134a as a coolant to simulate typical flow conditions in CANDU® nuclear power stations. The simulator had an axially uniform heat flux profile. Two radial heat flux profiles were tested: a fresh Bruce LVRF profile and a fresh natural uranium (NU) profile. For a given set of flow conditions, the channel power was set above the critical power to achieve dryout, while heater-element wall temperatures were recorded at various overpower levels using sliding thermocouples. The maximum experimental overpower achieved was 64%. For the conditions tested, the results showed that initial dryout occurred at an inner-ring element at low flows and an outer-ring element facing internal subchannels at high flows. Dry-patches (regions of dryout) spread with increasing channel power; maximum wall temperatures were observed at the downstream end of the simulator, and immediately upstream of the mid-bundle spacer plane. In general, maximum wall temperatures were observed at the outer-ring elements facing the internal subchannels. The maximum water-equivalent temperature obtained in the test, at an overpower level of 64%, was significantly below the acceptable maximum temperature, indicating that the integrity of the Bruce LVRF will be maintained at PDO conditions. Therefore, the Bruce LVRF exhibits good PDO heat transfer performance.
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Kammereck, Andreas, Kent Ryan, and Tammy Jacobson Moore. "Managing Risk at Pipeline River Crossings in Changing Regulatory Settings." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33627.

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Recent high profile exposure and rupture of pipelines at river crossings in the United States (U.S.) has raised the awareness of riverine hazards and the corresponding risks of operating pipeline river crossings. The decadal tendencies for rivers to change vertically (i.e. scour and deposition) and horizontally (i.e. channel migration) increases the risk to ageing pipeline systems. The corresponding cost of the consequences from potential exposures, damages or even ruptures at river crossings has re-defined the risk regime for planning, permitting, designing, installing, operating, and regulating river crossings. Pipeline systems installed decades ago frequently did not incorporate state of the art hydrotechnical engineering approaches, and did not address long-term channel scour and erosion dynamics, instead setting sagbends and burial depths relative to active (i.e. short term) channel conditions and not planning for long-term geomorphic trends. Planning for river crossing routing assessments now include increasing awareness of how riverine systems function. Hydrotechnical studies incorporate hydrologic, hydraulic, and fluvial geomorphic assessments and investigations, as well as environmental, social, and land inputs to the planning, permitting, design and construction processes. Recent high profile damage, exposure, and in some cases rupture of pipelines in river crossings has brought these issues into the public domain. Pipeline regulatory agencies and congressional oversight in the U.S. has responded to recent pipeline incidents in dynamic riverine conditions with increased permit planning, design and operation requirements. This paper will discuss the ways changing rivers are resulting in increasing challenges for pipeline operators, and discusses how Williams Northwest Pipeline (NWP) has implemented several practical mitigation measures to proactively address river crossing risks.
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Seo, Il, and Jaehyun Shin. "Overview of the transverse velocity profiles and application to meandering channels." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-40.

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Pastor-Martín, Candela, Loreto Antón, and Carlos Fernández-González. "MATLAB-BASED TOOL FOR DRAINAGE NETWORK ORDERING BY HORTON AND HACK HIERARCHIES." In 1st Congress in Geomatics Engineering. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/cigeo2017.2017.6607.

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This work presents a new MATLAB-based tool designed for network extraction and drainage network orderings by Horton and Hack hierarchies. Most GIS software offers only topological network orderings, based on joining segments, such as Stahler or Shreve, providing segments between junctions but not entire streams. Differently, Hack and Horton orderings allow organizing a drainage network in a hierarchy, identifying the parent segment over the child segment, giving as a result a drainage network where the value of a river remains unchanged from the mouth upstream to the headwater, allowing extracting entire streams. Horton and Hack hierarchies ease the interpretation of a drainage system compared to Strahler and Shreve. To extract the drainage network, this tool uses TopoToolbox 2 functions, to compute the prior steps of the channel network extraction and channel network ordering processes, and develops new functions. To sort a network, this tool allows selecting the parameter that defines the network hierarchy. This parameter is the so-called hierarchy attribute and could be the distance upstream, which refers to the distance between a junction upstream to the headwater, or the upstream accumulation, which is the accumulation at the junction. In addition to these mandatory parameters, the tool offers a set of optional parameters which turns it into a competitive alternative to generate a highly tailored ordered drainage network. The continuous channel network provided by the tool facilitates the use of other multiple applications for landscape analysis, such as the extraction longitudinal profiles or basin analysis through geomorphic indices.http://dx.doi.org/10.4995/CIGeo2017.2017.6607
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Schiller, Rafael Vergara, Marcelo Caire, Pedro Henrique Affonso Nóbrega, Elizabeth Passano, and Halvor Lie. "Vortex Induced Vibrations of Deep Water Risers: Sensitivity to Current Profile, Shear and Directionality." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24141.

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Slender offshore structures such as risers experience vortex induced vibrations (VIV) when they are exposed to currents and accumulate significant fatigue damage through that process. VIV will depend on several structural properties of the riser and on the current profile that the structure is exposed to. In deep water regions, risers will be subject to intricate circulation systems that impose currents profiles which may vary in intensity, shear and direction throughout the water column. The increased complexity of currents will make the prediction of VIV more difficult and represents a clear challenge to the Oil and Gas Industry. The objective of this study is to investigate how selected properties of a current profile affect the development and excitation of VIV for a deep water tensioned riser. We employ a semi-empirical frequency-domain program to perform a series of numerical sensitivity analyses where the riser model is subject to current profiles that vary in complexity and include uniform profiles, linearly-sheared profiles and more realistic profiles that represent offshore boundary current regimes from SE Brazil. We address the sensitivity of the VIV response to current intensity, shear and directionality. Our results demonstrate that those properties of the current profile have significant influence on the range of VIV modes that are excited and on the VIV response. Overall, uniform profiles produced the largest responses and the linearly-sheared profiles demonstrated the large range of VIV modes that can be excited. The realistic profiles also excited a broad range of VIV modes and variations between the profiles produced changes in the VIV response. This study highlights the need to further understand how complex current profiles in the offshore region affect VIV development in comparison to simpler profiles that are recurrent in model test conditions.
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MOLDOVAN, Aurelian Cosmin, and Raul SILAGHI. "The Morphological Impact of the Colibița Hydrotehnical System on the Bistrita Ardeleana Riverbed." In Air and Water – Components of the Environment 2021 Conference Proceedings. Casa Cărţii de Ştiinţă, 2021. http://dx.doi.org/10.24193/awc2021_08.

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Large dams, as well as conventional hydrotechnical constructions with the role of breaking the drainage slope (waterfalls or bottom sills), flood mitigation or with the role of protection against floods (shore defences) have a profound impact on the environment. Due to these constructions, the ecosystems on the Bistrița Ardeleană river have undergone changes or even established new ones. This paper wants to highlight the morphological changes of the Bistriţa riverbed by analysing the transversal profiles made between 1972 and 2015. The profiles were made in the flow measurement section at two hydrometric stations, one being located in the upstream part of the river basin and the other before the Bistrița river flows into the Șieu river. By comparing the results obtained from the profiles made before the Colibița hydrotechnical system was started or completed with the data obtained from the profiles after the commissioning of the Colibița hydropower plant, we managed to highlight that the Bistrița Ardeleană riverbed registered several negative effects in terms of morphologically both vertically and horizontally. We also found that the riverbed downstream of the dam there is a phenomenon called hydraulic paving.
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Tasaka, Yuji, Yasushi Takeda, Kaoru Yokoyama, and Shinya Kojima. "Environmental Flow Field Measurement by Ultrasonic Velocity Profiling." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37071.

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Ultrasonic velocity profiling (UVP) was applied to an environmental flow attempting an efficient measurement of river flow with higher accuracy in comparison with current measurement methods. Applicability of the method on measurement of an open channel flow was confirmed in a laboratory experiment; namely, the cross sectional velocity distribution of the channel was measured; the flow rate was obtained by integrating the velocity distribution; this showed high accuracy, around 4% in relative error. The method detecting the bottom position of the channel from a single velocity profile was also established and was demonstrated by various boundary conditions at the bottom of the channel. Actual river measurements were performed at a creek flowing out of a small pond in the campus of Hokkaido University; the width of the creek is approximately 1700 mm. Measured velocity distribution at a cross section of the river represents well the flow field. The bottom position of the river detected by the established method corresponds to that measured by a ruler excluding a place covered by waterweed. The flow rate determined by integrating the velocity distribution is in good agreement with that estimated by a weir mounted at the inlet of the river.
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Goncharov, Evgenii A., Kirill V. Arbuzov, and Natalya A. Bulygina. "CHANGE OF RADIATION PARAMETERS ALONG A LANDSCAPE PROFILE IN THE MAJDAN RIVER POOL OF THE ULLYANOVSK REGION." In Treshnikov readings – 2021 Modern geographical global picture and technology of geographic education. Ulyanovsk State Pedagogical University named after I. N. Ulyanov, 2021. http://dx.doi.org/10.33065/978-5-907216-08-2-2021-11-13.

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The article presents the results of assessing the contribution of technogenic and terrigenic radionuclides to the formation of the dose rate of gamma radiation for geosystems of the small river basin.
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Reports on the topic "River channel profiles"

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Harris, Kathleen, and Travis Dahl. Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : HEC-RAS BSTEM analysis of the Atchafalaya River. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45174.

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This report documents the bank erosion modeling performed under Task 6 (HEC-RAS Sediment Modeling) of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers System Technical Assessment. The objectives of the bank erosion modeling effort were to compare the relative impact various flow scenarios might have on bank retreat on a stretch of the Atchafalaya River between Simmesport, LA, and the Whiskey Bay Pilot Channel. The effort included compilation of field and soil boring data, selection of bank retreat sites, creation of representative soil profiles for the reach, calibration of soil parameters to measured retreat rates, and modeling bank retreat and volume of material eroded under various flow scenarios. This modeling effort was intended for scenario comparison and should not be used as a prediction of exact rates of bank erosion. The study found that varying the amount of flow entering the Atchafalaya River from the Mississippi River could increase dramatically or significantly reduce the extent of bank erosion, relative to the current management scenario.
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Copeland, Ronald, and James Lewis. Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers: Mississippi River HEC-6T model. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45160.

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The HEC-6T 1D numerical sedimentation model was used to evaluate the long-term and system-wide sedimentation effects of modifying the operation schedule at the Old River Control Complex (ORCC). The changes evaluated were the increase and decrease of the percentages of flow diverted from the Mississippi River at the ORCC and the modification of the distributions through the four ORCC structures. Also evaluated were dredging scenarios that removed sediment from the bed of the Mississippi River at the ORCC. Sedimentation effects for several operation and dredging scenarios were compared to a Base Condition that represented the existing operation protocols. The predictive simulations extended for 50 years. The model was used to calculate and compare sand transport past various gages along the Mississippi River and in the Outflow Channel. Dredging volumes at the deep-draft crossings and in Southwest Pass and above Head of Passes were compared. Differences in water-surface profiles in the vicinity of ORCC were determined.
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Simms, Janet, Benjamin Breland, and William Doll. Geophysical investigation to assess condition of grouted scour hole : Old River Control Complex—Low Sill Concordia Parish, Louisiana. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41863.

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Geophysical surveys, both land-based and water-borne, were conducted at the Old River Control Complex‒Low Sill, Concordia Parish, LA. The purpose of the surveys was to assess the condition of the grout within the scour region resulting from the 1973 flood event, including identification of potential voids within the grout. Information from the ground studies will also be used for calibration of subsequent marine geophysical data and used in stability analysis studies. The water-borne survey consisted of towed low frequency (16-80 MHz) ground penetrating radar (GPR), whereas the land-based surveys used electrical resistivity and seismic refraction. The GPR survey was conducted in the Old River Channel on the upstream side of the Low Sill structure. The high electrical conductivity of the water (~50 mS/m) precluded penetration of the GPR signal; thus, no useful data were obtained. The land-based surveys were performed on both northeast and southeast sides of the Low Sill structure. Both resistivity and seismic surveys identify a layered subsurface stratigraphy that corresponds, in general, with available borehole data and constructed geologic profiles. In addition, an anomalous area on the southeast side was identified that warrants future investigation and monitoring.
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Burns, L. E. Project report, interpretation maps, EM anomalies, stacked multi-channel profiles, and other products of the airborne geophysical survey for the Southern Dishna River, Fox Hills, and Beaver Creek survey areas, Iditarod, Ophir, and Holy Cross quadrangles, western Alaska. Alaska Division of Geological & Geophysical Surveys, March 2015. http://dx.doi.org/10.14509/27326.

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McParland, D., R. McKillop, and A. Blais-Stevens. Adjustments in channel planform and longitudinal profile at proposed pipeline crossings of Smoky River, Deep Valley Creek, and Little Smoky River, northwestern Alberta. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/308339.

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Hudson, Austin, Hans Moritz, and Jarod Norton. Sediment mobility, closure depth, and the littoral system – Oregon and Washington coast. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45346.

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Forty years ago, the depth of closure concept was introduced to provide a systematic, process-based approach to evaluate seasonal changes in cross-shore profiles and sediment mobility in the nearshore. This study aims to extend that theory by directly considering wave-asymmetry in the nearshore environment. This technical note introduces a methodology to calculate wave induced dispersal of dredged material placed in nearshore sites and summarizes analyses validating the approach using data from the South Jetty Site at the Mouth of the Columbia River. This investigation highlights the notion of a cross-shore gradient in nearshore placement effectiveness of dredged material that can assist project managers plan and execute sustainable sediment management practices at coastal inlets.
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