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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>World Environmental and Water Resources Congress 2017: Hydraulics and Waterways and Water Distribution Systems Analysis</title>
      <link>https://trid.trb.org/View/1557603</link>
      <description><![CDATA[Selected papers from the World Environmental and Water Resources Congress 2017, held in Sacramento, California, May 21–25, 2017. Sponsored by the Environmental and Water Resources Institute of ASCE. This collection contains 67 peer-reviewed papers from the Hydraulics and Waterways Council and the Water Distribution Systems Analysis Committee. Topics include: modeling and assessment of water distribution systems; modeling hydraulics of water systems; sediment transport simulation; and erosion assessment and control. This proceedings will be of interest to practitioners as well as government and academic professionals, providing the latest case studies, research, and public policy information.]]></description>
      <pubDate>Fri, 30 Nov 2018 17:06:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/1557603</guid>
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      <title>Evaluating the Success of Meeting Design Objectives on Previously Constructed OOS Stream Stability Projects</title>
      <link>https://trid.trb.org/View/1530311</link>
      <description><![CDATA[The ability to detect failure or impending failure of a stream stabilization project or its components is important to assuring that the bridge will be protected during high flow events. The objectives of this project were to assess the degrees of success of stream channel transition designs through bridge reaches and the suitability of these projects to transport sediment through the bridge opening. In addition to creating a methodology for assessing existing transitions, a methodology was developed that guides the design type selection process at new bridges or new channel transition projects. This process uses a rapid channel stability assessment to initially assess a site for instabilities that need to be addressed by the design. Two design checks are included as part of the method. The first check is the V/Vc analysis for assessing general trends in sediment mobilization through the bridge opening. Due to the use in this study of one dimensional HEC-RAS models to provide inputs for channel depth and velocity, the V/Vc results provide only an average-based mobilization. The second design check is the Failure Modes and Effects Analysis. This requires the designer to systematically analyze all the potential failure modes of the design and to consider solutions that reduce the risk priority numbers of design components. Incorporating these checks in the design process should help increase the likelihood of a successful channel transition design. Several observations and recommendations were made based on field observations at a limited number of sites, comparisons of imagery, and analyses described in this report.]]></description>
      <pubDate>Mon, 13 Aug 2018 22:28:59 GMT</pubDate>
      <guid>https://trid.trb.org/View/1530311</guid>
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      <title>Culvert Designs for Aquatic Organism Passage: Culvert Design Practices Incorporating Sediment Transport</title>
      <link>https://trid.trb.org/View/1409697</link>
      <description><![CDATA[The design of culverts to accommodate aquatic organism passage (AOP) requires an understanding of organism habitat requirements, swimming ability and migration needs, as well as an understanding of how a culvert design will perform in a specific geomorphic context. This report documents existing reports on culvert design for AOP in Minnesota and nationally. The review is designed to build upon the work of Hansen et al. 2009 and 2011 to: 1) summarize current aquatic organism passage practices, 2) summarize aquatic organism passage needs for Minnesota species, 3) discuss the importance of roughness or streambed sediment within a culvert in different systems (high, medium, or low slope) in single and multiple barrel systems, and 4) summarize physical experiments of sediment transport and geomorphic processes through culverts.]]></description>
      <pubDate>Wed, 08 Jun 2016 14:55:26 GMT</pubDate>
      <guid>https://trid.trb.org/View/1409697</guid>
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      <title>Maintenance Dredging Required after Port Extensions at Walvis Bay</title>
      <link>https://trid.trb.org/View/1388895</link>
      <description><![CDATA[Walvis Bay, the major port of Namibia, is earmarked for extensions. The extension of the entrance channel and the port can increase the maintenance dredging cost considerably, and if not correctly planned could impact negatively on the nearby Walvis Lagoon. An improved layout for the extended port is recommended taking into account the sediment transport regime. The future maintenance dredging rate for the extended port is determined to be 720,000 m3/year compared with the 200,000 m3/year for the existing commercial and fishing harbours. The future general cargo quays could be located so as to minimise the influx of sediment into the Walvis Lagoon. It is shown that the water exchange to the lagoon will not be significantly affected.]]></description>
      <pubDate>Wed, 27 Jan 2016 17:12:40 GMT</pubDate>
      <guid>https://trid.trb.org/View/1388895</guid>
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      <title>The art of screening : effectiveness of slit screens</title>
      <link>https://trid.trb.org/View/1277684</link>
      <description><![CDATA[]]></description>
      <pubDate>Mon, 18 Nov 2013 10:28:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/1277684</guid>
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      <title>Stream Stability at Highway Structures, Fourth Edition</title>
      <link>https://trid.trb.org/View/1142358</link>
      <description><![CDATA[This document provides guidelines for identifying stream instability problems at highway stream crossings. It is an update of the third edition published in 2001. The HEC-20 manual covers geomorphic and hydraulic factors that affect stream stability and provides a step-by-step analysis procedure for evaluation of stream stability problems. Stream channel classification, stream reconnaissance techniques, and rapid assessment methods for channel stability are covered in detail. Quantitative techniques for channel stability analysis, including degradation analysis, are provided, and channel restoration concepts are introduced. Significant new material in this edition includes chapters on sediment transport concepts and channel stability in gravel bed streams, as well as expanded coverage of channel restoration concepts.]]></description>
      <pubDate>Wed, 11 Jul 2012 08:44:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/1142358</guid>
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      <title>Numerical Modeling of Wind-Waves and Its Effect on Sediment Transport. An Investigation of Spectral Terms</title>
      <link>https://trid.trb.org/View/1117621</link>
      <description><![CDATA[The interaction between wind waves and sediment movement at shores is a complex process, and its understanding is important. An accurate wave forecasting can result in better estimates of sediment movement along beaches. In addition, it will provide opportunities for improved planning and taking appropriate safety measures against the extreme events. A number of numerical models for wind-wave prediction are available which use inherent physics for wind-wave evolution. These models perform better for deep water predictions but still lack full understanding of balance of sources terms in finite water depth. An enhanced understanding of these terms will result in better estimation of sediment transport on beaches. The present study provides increased insight into the variation of two important source terms; non-linear wave-wave interactions and bottom friction which have significant effect on sediment transport. The non-linear wave-wave interactions have positive and negative signature and is the least understood term in wind-wave evolution. The bottom friction is always negative and withdraws energy from the spectrum. Thus, this study has provided better understanding of these two terms, and shows that together these affect the development of peak of the spectrum and hence wave energy. Consequently, because of their importance it will affect sediment balance at the shore.]]></description>
      <pubDate>Wed, 25 Apr 2012 13:35:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/1117621</guid>
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    <item>
      <title>Enhancement of FDOT’s SERF Device and a Study of Erosion Rates of Rock, Sand, and Clay Mixtures using FDOT’s RETA and SERF Equipment</title>
      <link>https://trid.trb.org/View/1113112</link>
      <description><![CDATA[The primary cause of bridge failure in the United States is scour, or erosion of bed material around the bridge’s foundations. Over the years, equations and predictive methods have been developed to predict erosion depths around a bridge’s substructure. The most effective of these predictive methods for situations where cohesive material, or earth material that is composed of clayey or rock-like elements, is present require the input of a parameter known as a sediment transport function. A sediment transport function is simply a relationship between flow conditions and erosion rate of the bed material in the absence of the structure. Theoretical methods exist for predicting sediment transport functions, but they are difficult to compute. Current design standards recommend measuring sediment transport functions in a laboratory. Until now, there has been some question as to how to do this properly. Work in this report helps to answer this question.]]></description>
      <pubDate>Thu, 18 Aug 2011 16:07:37 GMT</pubDate>
      <guid>https://trid.trb.org/View/1113112</guid>
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      <title>Operation Manual for the Sediment Erosion Rate Flume (SERF), Second Edition</title>
      <link>https://trid.trb.org/View/1113111</link>
      <description><![CDATA[This document is to be read in conjunction with the final report for this project entitled "Enhancement of FDOT's SERF Device and a Study of Erosion Rates of Rock, Sand, and Clay Mixtures using FDOT's RETA and SERF Equipment."  This brief manual provides discussion, procedures, and descriptions for testing in the Sediment Erosion Flume Device (SERF).]]></description>
      <pubDate>Thu, 18 Aug 2011 16:07:37 GMT</pubDate>
      <guid>https://trid.trb.org/View/1113111</guid>
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    <item>
      <title>Two-dimensional modeling of sediment transport and bed morphology to identify shoaling reduction alternatives near Matanzas Inlet in St. Johns County, Florida</title>
      <link>https://trid.trb.org/View/927160</link>
      <description><![CDATA[This study describes the field measurements and MIKE21 numerical modeling of tides, waves, sediment transport, and bed morphological changes in the Intracoastal Waterway (ICWW) near Matanzas Inlet in St. Johns County, Florida. The model results generally agree well with measured water levels, current speeds, current direction, and observed morphological patterns in the area. The models applications provided the means to (1) understand the transport of sediments and formation of the shoals in the ICCW, (2) identify various alternatives that could reduce ICCW shoaling rates, and (3) evaluate the performace and the associated cost and frequency of maintenance dredging for alternatives that show potential to reduce the ICCW shoaling. Model results show flood slows as it flows south around the northern tip of Rattlesnake Island. This rapid decrease in flow velocity explains the observed sediment deposition (shoaling) in the ICWW. Model results show basins located in the north arm of Matanzas River and north of Fort Matanzas will likely reduce shoaling in the ICWW and reduce maintenance dredging from the current once every three years to once every four years. A dune breach that opened another outlet to the ocean during the period of this study likely had minimal impact on shoaling at the ICWW. Copyright 2010 ASCE.]]></description>
      <pubDate>Thu, 28 Oct 2010 07:01:48 GMT</pubDate>
      <guid>https://trid.trb.org/View/927160</guid>
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    <item>
      <title>Temporal Scales for Live-Bed Scour at Abutments</title>
      <link>https://trid.trb.org/View/921390</link>
      <description><![CDATA[Live-bed scour at a vertical-wall abutment is experimentally investigated with specific attention paid to the conceptual issues concerning the temporal development of local scour phenomenon. First explored are the time scales for the initial rising phase of the time variation of scour depth. An appropriate identification of such scales and of their normalizing parameters makes it possible to recognize a quantitative dependency of nondimensional time scales on flow intensity. Second, the time scales for the subsequent fluctuations around a mean equilibrium value are considered. Experimental results indicate that the quasiperiodical fluctuations of scour depths do not always correspond to those of bed forms. A conceptual model is outlined to explain this aspect.]]></description>
      <pubDate>Fri, 16 Jul 2010 11:36:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/921390</guid>
    </item>
    <item>
      <title>Design Guidance for Low-Water Crossings in Areas of Extreme Bed Mobility, Edwards Plateau, Texas</title>
      <link>https://trid.trb.org/View/902774</link>
      <description><![CDATA[The purpose of this report is to present results from a combination of field and laboratory investigations of mobility of gravel to cobble sized materials in Texas streams on the Edwards Plateau. The Texas Department of Transportation (TxDOT) uses low-water crossings for many of the roadways in the region, particularly where the streams are ephemeral. When the streambed mobilizes, instances of roadway loss of service, either by deposition of large amounts of bed materials or by structural failure associated with streambed mobilization are relatively common. The objectives of the project were to determine the mechanics of streambed mobilization and develop design guidelines (approaches) to mitigate damage associated with streambed mobilization events. Numerical models were developed and a geographic information system (GIS) approach was used to demonstrate how area subject to streambed mobilization can be identified through application of these tools. Physical models were used to demonstrate the mechanics of streambed mobilization and test current design solutions. The physical model identified the mechanics for culvert “self-clearing” and that a porous roadbed results in changes to the flow dynamics that affect bedload deposition in the low-water crossing area. An offset three-culvert design was identified by TxDOT engineers as an alternative to the more-common box culvert.]]></description>
      <pubDate>Fri, 23 Oct 2009 16:16:11 GMT</pubDate>
      <guid>https://trid.trb.org/View/902774</guid>
    </item>
    <item>
      <title>Bed-Load Sediment Transport on Large Slopes: Model Formulation and Implementation within a RANS Solver</title>
      <link>https://trid.trb.org/View/871710</link>
      <description><![CDATA[Standard bed-load sediment-transport formulas are extended using basic mechanical principles to include gravitational influence on large slopes of arbitrary orientation. The resulting sediment fluxes are then incorporated into a morphodynamics model in a general-purpose, 3-D, finite-volume, Reynolds-averaged Navier–Stokes code. Major features are: 1) the downslope component of weight is combined with the fluid stress to form an effective bed stress (similar to the work of Wu, 2004); 2) the critical effective stress is reduced in proportion to the component of gravity normal to the slope; 3) a simple flux-based model for avalanching is implemented as a numerical means of preventing the local slope from exceeding the angle of repose; 4) an entirely vectorial formulation of bed-load transport is developed to account for arbitrary surface orientation; and 5) methods for reducing numerical instability in the morphodynamics equation are described. Sample computations are shown for scour and accretion in a channel bend and for the movement of sand mounds on erodible and nonerodible bases.]]></description>
      <pubDate>Tue, 21 Oct 2008 08:49:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/871710</guid>
    </item>
    <item>
      <title>The day after we stop dredging : a world without sediment plumes?</title>
      <link>https://trid.trb.org/View/866158</link>
      <description><![CDATA[]]></description>
      <pubDate>Thu, 07 Aug 2008 12:35:58 GMT</pubDate>
      <guid>https://trid.trb.org/View/866158</guid>
    </item>
    <item>
      <title>Modeling Vessel-Generated Currents and Bed Shear Stresses</title>
      <link>https://trid.trb.org/View/863499</link>
      <description><![CDATA[Adaptive Hydraulics (ADH) is a computational fluid dynamics package that solves the Navier-Stokes equations and shallow water (depth-averaged Navier-Stokes) equations on two- and three-dimensional computational meshes for overland flow, sediment transport, and groundwater problems. The capability to model the hydrodynamic effects of vessels moving through a two-dimensional flow field has been added to ADH. Using empirical relations developed by Maynord (2000), the bed shear stresses induced by a barge bow and towboat propeller may also be calculated, which, in turn, can be used to predict sediment transport. Guidelines have been developed for sufficient mesh refinement near the vessel and appropriate values for the mesh adaption parameters in ADH. To demonstrate the new modeling capability, this report describes in detail a study of the effects of a vessel sailing through a stretch of the Illinois Waterway near Kampsville, IL. The vessel-induced shear stresses are also reported for the Kampsville study.]]></description>
      <pubDate>Thu, 17 Jul 2008 09:25:18 GMT</pubDate>
      <guid>https://trid.trb.org/View/863499</guid>
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