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QUANTIFYING INSTREAM SEDIMENT TRANSPORT IN SEVERAL REACHES OF THE UPPER BRAZOS RIVER BASIN, TEXAS.

QUANTIFYING INSTREAM SEDIMENT TRANSPORT IN SEVERAL REACHES OF THE UPPER BRAZOS RIVER BASIN, TEXAS.
Author:
Publisher:
Total Pages:
Release: 2008
Genre:
ISBN:

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The focus of this research was the clarification of discrepancies found within the historic suspended sediment record for the Upper Brazos River, specifically at South Bend and Seymour, TX, as well as quantifying sediment transport dynamics within the upper basin. Flow duration curves constructed for the Brazos River indicate that both Seymour and South Bend experience similar high and low flow regimes, with the magnitude of the flow being the only difference. Contemporary samples at Seymour and South Bend produced specific sediment yields of 70 t km-2 yr-1 and 62 t km-2 yr-1 respectively. Heavy rainfall within the upper basin region of the Brazos River typically produces negative hysteresis within the sediment discharge. These concentrations are greater as discharge is dropping, this occurs in this reach of the Brazos because most of the sediment supplied to the river is from distant upstream reaches rather than immediately up river and proximal to the gaging station.


Sediment Transport and the Geomorphic Evolution of the Coastal Trinity River, TX

Sediment Transport and the Geomorphic Evolution of the Coastal Trinity River, TX
Author: Jasmine Mason
Publisher:
Total Pages: 334
Release: 2018
Genre:
ISBN:

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This dissertation uses field observations to understand how changes in sediment transport affect the geomorphic evolution of the coastal Trinity River in Texas. I focus on the main channel of the river along the transition from quasi-uniform flow conditions into gradually varying flow. To begin, I will use elevation data in conjunction with stratigraphic analysis to suggest that scroll bars represent levee deposition along the inner bank of the river channel (Chapter 2). Because their channel-ward edge marks the transition from bed-material transport processes that are associated with the point bar and the proximal overbank deposits of the floodplain, they can be considered the geomorphic edge of the active channel form. Chapters three and four then focus on changes within the active channel through a range of time scales. Separate measurements of inner and outer bank volumetric change and migration show that river banks are capable of migrating independently over short time scales, but migrate compensationally over longer periods. The fifth chapter discusses the observation of a new scale of self-organization in bed topography that occurred along the base of the channel during a historic flood in 2015 (which was captured by the time-lapse lidar used in chapters 3 and 4). Repeat depth surveys show that 12 km long wavelength trains of dunes, spread out over an average of 12 river bends, advected and deformed downstream throughout the 55 day flood. These bedform groups are interpreted as an expression of prolonged washout that occurred over an initially spatially variable bedform field. Remaining questions and suggestions for future research directions are provided in the final chapter. Altogether, this dissertation represents a body of work that spans multiple temporal and spatial scales, and provides the community with a better understanding of how gradually varied flow affects sediment transport and geomorphology. In addition, it provides a foundation for future research that can illuminate important details about fluvial processes in general.


Final Report

Final Report
Author: University of Texas at Arlington
Publisher:
Total Pages:
Release: 1977
Genre: River sediments
ISBN:

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Tools in Fluvial Geomorphology

Tools in Fluvial Geomorphology
Author: G. Mathias Kondolf
Publisher: John Wiley & Sons
Total Pages: 570
Release: 2016-06-13
Genre: Science
ISBN: 0470684054

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Fluvial Geomorphology studies the biophysical processes acting in rivers, and the sediment patterns and landforms resulting from them. It is a discipline of synthesis, with roots in geology, geography, and river engineering, and with strong interactions with allied fields such as ecology, engineering and landscape architecture. This book comprehensively reviews tools used in fluvial geomorphology, at a level suitable to guide the selection of research methods for a given question. Presenting an integrated approach to the interdisciplinary nature of the subject, it provides guidance for researchers and professionals on the tools available to answer questions on river restoration and management. Thoroughly updated since the first edition in 2003 by experts in their subfields, the book presents state-of-the-art tools that have revolutionized fluvial geomorphology in recent decades, such as physical and numerical modelling, remote sensing and GIS, new field techniques, advances in dating, tracking and sourcing, statistical approaches as well as more traditional methods such as the systems framework, stratigraphic analysis, form and flow characterisation and historical analysis. This book: Covers five main types of geomorphological questions and their associated tools: historical framework; spatial framework; chemical, physical and biological methods; analysis of processes and forms; and future understanding framework. Provides guidance on advantages and limitations of different tools for different applications, data sources, equipment and supplies needed, and case studies illustrating their application in an integrated perspective. It is an essential resource for researchers and professional geomorphologists, hydrologists, geologists, engineers, planners, and ecologists concerned with river management, conservation and restoration. It is a useful supplementary textbook for upper level undergraduate and graduate courses in Geography, Geology, Environmental Science, Civil and Environmental Engineering, and interdisciplinary courses in river management and restoration.


Final Report

Final Report
Author: Syed R. Qasim
Publisher:
Total Pages: 93
Release: 1976*
Genre: River sediments
ISBN:

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Trinity River Bottom Sediment Reconnaissance Study. Phase I. Plan of Work

Trinity River Bottom Sediment Reconnaissance Study. Phase I. Plan of Work
Author: Syed R. Qasim
Publisher:
Total Pages: 107
Release: 1976
Genre:
ISBN:

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Phase I Trinity River Bottom Sediment Reconnaissance Study was conducted to develop a plan of work in order to determine the physical and chemical quality of the bottom sediments in the Trinity River. This plan includes selection of sampling sites that represented the following: typical land use, point and nonpoint source discharges, velocity profiles and sediment transport, suitable landmarks, geological formations, existing USGS gauging stations, existing TWQB sediment monitoring stations and accessibiliy. Chemical analyses were conducted in the laboratory on filtered and unfiltered river water, filtered and unfiltered elutriates using river water, and bottom sediment. Findings are included in the accompanying volume of appendices; charts, formulas, diagrams and tables relating to Final Report, Trinity River Bottom Sediment Reconnaissance Study-Phase I-Plan of Work. (Author).