Improved dynamics modelling for drainage sediment prediction and management
type: CreativeWork
description: The study reported in this thesis aims to further knowledge of sediment behaviour and provides engineers with appropriate tools and methods to facilitate proactive sediment management. The techniques developed during this investigation are therefore able to predict the locations and quantities of sediment deposits through improved sediment transport methods and offer a strategy of sediment control using sediment traps where appropriate. To facilitate these methods, a number of the previous shortcomings of drainage sediment modelling required to be addressed. Most notably these included: single particle size limitation, impractical processing times; the use of purely granular analysis; and no feedback between sediment and hydraulic models. A programme of data collection was devised to develop and test the techniques of this investigation, focussing on sediment processes in sewer pipes and sediment traps. The data collected included, suspended and near bed transport rates, long-term sediment bed development and sediment trap filling patterns. These data and previous data sets were then used in the development of analytical methods for the prediction of sediment behaviour. Field tests were also undertaken to assess the performance of an alternative form of sediment trap using partial covers. These tests highlighted the importance of good site selection for sediment traps as no improvement in trap performance could be achieved at a poor trap location through the alteration of trap form. The resulting sediment transport models were typically developed using a combination of the historical and new short-term data sets, and were then verified using newly collected long- term data. Models were developed for rapid hydraulic simulation, sediment location prediction, sediment erosion, sediment movement, sediment deposition and trap filling. The current limitations of sediment modelling were addressed through a number of innovations which have built on the experience of CIRIA r…
abstract: The study reported in this thesis aims to further knowledge of sediment behaviour and provides engineers with appropriate tools and methods to facilitate proactive sediment management. The techniques developed during this investigation are therefore able to predict the locations and quantities of sediment deposits through improved sediment transport methods and offer a strategy of sediment control using sediment traps where appropriate. To facilitate these methods, a number of the previous shortcomings of drainage sediment modelling required to be addressed. Most notably these included: single particle size limitation, impractical processing times; the use of purely granular analysis; and no feedback between sediment and hydraulic models. A programme of data collection was devised to develop and test the techniques of this investigation, focussing on sediment processes in sewer pipes and sediment traps. The data collected included, suspended and near bed transport rates, long-term sediment bed development and sediment trap filling patterns. These data and previous data sets were then used in the development of analytical methods for the prediction of sediment behaviour. Field tests were also undertaken to assess the performance of an alternative form of sediment trap using partial covers. These tests highlighted the importance of good site selection for sediment traps as no improvement in trap performance could be achieved at a poor trap location through the alteration of trap form. The resulting sediment transport models were typically developed using a combination of the historical and new short-term data sets, and were then verified using newly collected long- term data. Models were developed for rapid hydraulic simulation, sediment location prediction, sediment erosion, sediment movement, sediment deposition and trap filling. The current limitations of sediment modelling were addressed through a number of innovations which have built on the experience of CIRIA r…
author: Fraser, Alasdair
language: eng
date published: 2005-8
date modified: 2026-07-24T00:50:23Z
provider: Abertay University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Abertay Dundee