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Showing 1 to 13 of 13 for “"Water quality modelling"”.
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Water quality modelling of eutrophied reservoirs in South Africa
… about the increase in eutrophication-related water quality problems during the early 1970's. The first step taken to control eutrophication was introduction of an effluent phosphate standard that limited the phosphorus concentration in effluents being discharged in certain sensitive catchments …
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Water quality modelling of a grossly polluted stream using continuous monitoring.
The development of a statistical water quality model for a grossly polluted stream in an industrial environment, is examined. The data used for model development was obtained from a continuous water quality monitoring station (WQMS), which recorded five quality determinands each quarter hour. The …
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Hydrodynamic and water quality modelling of Chicago Area Waterway System (CAWS)
Chicago Area Waterway System (CAWS) is a highly branched network of natural rivers and man-made canals. The total length of CAWS including rivers and canals is about 250 kms (156 miles). Although not very long CAWS is famous for the engineering feat that reversed the flow of Chicago River (CR), an …
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Water quality modelling for recreational use in the Kallang River Basin, Singapore
Singapore's Active, Beautiful, and Clean Waters Programme (ABC) aims to provide functional use of its water bodies to the public. The Kallang River Basin, being part of the ABC Programme, will be used for recreational purposes such as dragon boating and other water sports. In order to provide safe …
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Evaluation of water quality in urban drinking water distribution networks: a case study in Johannesburg, South Africa
… of South Africa (RSA) access to drinking water is a constitutionally guaranteed human right. The supply of safe drinking water to consumers is a legal requirement and the numerical limits for drinking water quality are described in SANS 241:2015. However, in 2023 over 30% of RSAs Water …
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Testing the use of the BASINS PLOAD model to simulate the quality of stormwater runoff from the Kuils River catchment, Cape Town
The interaction between land use and water quality in urban catchments is closely linked. As pollutants accumulate on land surfaces they are carried in runoff. This has led to increasing concerns that stormwater is responsible for adversely affecting the quality of freshwater resources. Total …
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Modelling the Water Quality of the Patos Lagoon, Brazil
A two-dimensional depth integrated finite element modelling suite comprising the flow model TELEN4AC-2D and the water quality model WQFLOW-2D has been calibrated to simulate the physics and chemistry of the Patos Lagoon and Estuary system in southern Brazil for the investigation of nutrients, …
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An analysis of hydraulic, environmental and economic impacts of flood polder management at the Elbe River
… are used for the controlled storage of flood water so as to lower peak discharges of large floods. Consequently, the flood hazard in adjacent and downstream river reaches is decreased in the case of flood polder utilisation. Flood polders are usually dry storage reservoirs that are typically …
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Head-dependent modelling and optimisation of water distribution systems
The construction, operation and maintenance of water distribution systems (WDSs) involve a huge capital investment and it is essential to design and manage them in a cost effective way. The optimisation approaches (e.g. evolutionary algorithms) for optimal design or operation of WDSs require …
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Linking biophysical models and life cycle assessment to evaluate environmental tradeoffs of urban water infrastructure design
Water, a limited resource even on our hydrous planet, has always been inextricably tied to the rise and fall of cities and human infrastructure. Clean, plentiful water drives our food and energy production, provides transport, and keeps humans and the environment healthy. Integrated urban water …
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Numerical modelling of solute transport processes using higher order accurate finite difference schemes. Numerical treatment of flooding and drying in tidal flow simulations and higher order accurate finite difference modelling of the advection diffusion equation for solute transport predictions.
The modelling of the processes of advection and dispersion-diffusion is the most crucial factor in solute transport simulations. It is generally appreciated that the first order upwind difference scheme gives rise to excessive numerical diffusion, whereas the conventional second order central …
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Parameter estimation of urban drainage models
… areas into impervious areas increases the stormwater runoff quantity dramatically. One way of minimising urban flooding is to convey stormwater to receiving waters through stormwater drainage systems, which has been practised in the past. This practice is currently changing and the current …