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<p>This document is the final report to the thesis executed by Henrik Granlund at the University of Linköping. The thesis is a practical assignment which includes an extension of the currently existing modelling tool GOAT. The extension regards to a integration of the internet based security database, the SHIELDS SVRS. The report goes through an overview of how GOAT is designed and later also the parts that has been extended. There after follows a summary and discussion about the work.</p>

Originally presented as the author's Thesis (doctoral)--Universität Innsbruck, 1984/85. / Includes bibliographical references (p. [113]-115) and indexes.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1934. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Originally presented as the author's Thesis (doctoral)--Universität Innsbruck, 1984/85. / Includes bibliographical references (p. [113]-115) and indexes.

Thesis--Halle-Wittenburg. / Vita.

No description available.

The Shield&rsquo / s Diagram has been the key stone for the description of initiatial motion of a particle in open channel flow. Data in Shield&rsquo / s study and further studies are collected in channels. However, the approximation of these data for the case of withdrawal of sediment or clean water through bottom outlets has not been confirmed. Furthermore, two phase models run to simulate the phenomenon so far have used brine and water combination. In this study, an experimental attempt is made to study the behavior of deposits subject to withdrawal from a bottom outlet where there are not enough parameters to calculate the bottom shear stress and consequently the dimensionless parameters generally used for the description of initiation of motion. The experimental set up used for this purpose is a 1 m long and 0.35 m wide channel such that at the downstream of the channel there is a horizontal slit representing the bottom outlet. During the experiments, fresh water and sand with D50 = 0.298 mm and D50 = 0.912 mm are used. Two different widths of the slit, namely 0.35 m and 0.0875 m are investigated. Based on the observations of the incipient motion of the sediment, the findings in the form of a relationship among the discharge through the bottom outlet, and some other relevant parameters are reported. In addition, a comparison of these data with the literature by the help of some newly defined dimensionless parameters for the description of the initiation of motion is included.

Bed load transport measurements were made in a small urban stream in Decatur, GA, from which thresholds for motion were calculated using methodologies from the published literature. These methodologies are discussed in terms of their limitations and assumptions. Mobility frequencies were calculated for single grains of each grain size fraction to illustrate the transition from size selective transport to equal mobility. In general, urban streams behave differently than many gravel rivers in non-urban settings because of differences in the availability and character of sediment sources and altered flow hydrographs. This comparison allows for discussion about the way sediment is transported in urban streams versus typical gravel-bed, armored channels.