General Hydrodynamic Model for Sewer/Channel Network Systems

Ji, Zhong

doi:10.1061/(asce)0733-9429(1998)124:3(307)

Cited by 55 publications

(33 citation statements)

References 6 publications

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“…However, the smaller time step needed for explicit methods may limit the use of such models for complex river and pipe networks. The Preissmann method and slot technique are therefore often adopted for flows in open channel and closed conduits under different flow conditions [47][48][49].…”

Section: Brief Review Of Methods and Modelsmentioning

confidence: 99%

Integrated River and Coastal Flow, Sediment and Escherichia coli Modelling for Bathing Water Quality

Huang

Falconer

Lin

2015

Water

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Due to the increasing economic and cultural value of bathing waters and the shellfish industry in the UK and worldwide, water quality in estuarine and coastal waters has attracted considerable public attention in recent years. To obtain accurate predictions of the concentration distributions of faecal indicator organisms (FIOs) in coastal waters for better management of bathing water compliance, it is necessary to build an integrated modelling system to predict the complete diffuse and point source inputs from river and catchment basins. In the present paper, details are given of the development of such an integrated modelling system for simulating the transport and decay processes of FIOs, from catchment areas upstream from the coastal region, in which a distributed catchment module, a 1D river network module and a 2D estuarine and coastal module are linked dynamically by boundary inputs and outputs. Extensive measured data from the catchments, river networks and estuaries have been collated to determine the model parameters. Verification results of the distribution of water levels, flows and velocities, and suspended sediment and Escherichia coli concentrations, at controlled monitoring sites are presented, which show that the integrated model predictions generally agree well with the measurements, although locally appreciable errors can occur. The model results also highlight the importance of including the flux of FIOs via sediments being an important factor in terms of assessing the quality of bathing waters. The main factors influencing the relatively high concentration values in the bathing region are analysed, based on the model predictions and measured data, with four categories of FIO concentration levels being reviewed. OPEN ACCESSWater 2015, 7 4753

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Section: Brief Review Of Methods and Modelsmentioning

confidence: 99%

Integrated River and Coastal Flow, Sediment and Escherichia coli Modelling for Bathing Water Quality

Huang

Falconer

Lin

2015

Water

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“…GSSHA TM incorporates the SuperLink storm drainage model (Ji 1998) to simulate either subsurface storm drainage networks or the tile drain networks commonly used in agricultural fields. In the case of storm drainage networks, drop inlets are included in specified grid cells.…”

Section: Flood Analysismentioning

confidence: 99%

Opportunity-driven hydrological model development in US Army research and development programs

Downer

Ogden

Martin

et al. 2012

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The US Army has compelling needs for making hydrological forecasts. These range from tactical predictions of water levels and soil moisture, to strategic protection of both Army and civilian assets and environmental resources. This paper discusses the history of hydrological model development by the US Army Corps of Engineers (USACE) as influenced by changes in needs and technologies. It concludes with a description of the Gridded Surface/Subsurface Hydrologic Analysis (GSSHA™) model, a two-dimensional, structured-grid, physics-based hydrological, hydrodynamic, sediment and nutrient/contaminant transport model, developed over the past two decades, that is currently used by the USACE. The surface hydrology of the USA has been divided by the US Geological Survey into 21 major geographic domains that contain either the drainage area of a major river or the combined drainage areas of a series of rivers of similar character developed in one geographic province. Eighteen of the regions occupy the land area of the conterminous USA. Alaska, the Hawaiian Islands and Puerto Rico are separate domains. This approach provides a framework for the hydrological modelling discussed in this paper for sites within six of these regions. That the physics-based GSSHA modelling capability has so far been applied with success gives confidence in its more widespread application.

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“…However, few vulnerability assessment studies investigate the vulnerability of the entire drainage systems [41], especially the comparative analysis of the vulnerability for pipe networks which have different layouts, such as tree and loop drainage systems. Though loop drainage systems are not common, there are still many loop networks in reality [34,36,[42][43][44]. For example, Yongwon et al (2015) stated that "loops are easily found in urban catchments not just for water supply pipe networks, but also for stormwater drainage pipe networks" [42], and investigated the behavior of a fully looped network for a given rainfall event using the Storm Water Management Model.…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

et al. 2017

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Vulnerability analysis of urban drainage networks plays an important role in urban flood management. This study analyzes and compares the vulnerability of tree and loop systems under various rainfall events to structural failure represented by pipe blockage. Different pipe blockage scenarios, in which one of the pipes in an urban drainage network is assumed to be blocked individually, are constructed and their impacts on the network are simulated under different storm events. Furthermore, a vulnerability index is defined to measure the vulnerability of the drainage systems before and after the implementation of adaptation measures. The results obtained indicate that the tree systems have a relatively larger proportion of critical hydraulic pipes than the loop systems, thus the vulnerability of tree systems is substantially greater than that of the loop systems. Furthermore, the vulnerability index of tree systems is reduced after they are converted into a loop system with the implementation of adaptation measures. This paper provides an insight into the differences in the vulnerability of tree and loop systems, and provides more evidence for development of adaptation measures (e.g., tanks) to reduce urban flooding.

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General Hydrodynamic Model for Sewer/Channel Network Systems

Cited by 55 publications

References 6 publications

Integrated River and Coastal Flow, Sediment and Escherichia coli Modelling for Bathing Water Quality

Integrated River and Coastal Flow, Sediment and Escherichia coli Modelling for Bathing Water Quality

Opportunity-driven hydrological model development in US Army research and development programs

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

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