Thornton Creek Water Quality Channel, Urban Water Quality, and Environmental Benefits

2008 ◽  
Author(s):  
Greg Giraldo ◽  
Masako Lo ◽  
Melanie Davies ◽  
Erich Ellis
Keyword(s):  
Water Quality ◽  
Environmental Benefits ◽  
Urban Water ◽  
Urban Water Quality ◽  
Creek Water ◽  
Creek Water Quality

The influence of rainfall time resolution for urban water quality modelling

2010 ◽  
Vol 61 (9) ◽  
pp. 2381-2390 ◽  
Author(s):  
Gabriele Freni ◽  
Giorgio Mannina ◽  
Gaspare Viviani
Keyword(s):  
Water Quality ◽  
Temporal Resolution ◽  
Rainfall Data ◽  
Urban Water ◽  
Water Quality Modelling ◽  
Quality Model ◽  
Discharge Data ◽  
Urban Water Quality ◽  
Quality Aspects ◽  
The Impact

The objective of this paper is the definition of a methodology to evaluate the impact of the temporal resolution of rainfall measurements in urban drainage modelling applications. More specifically the effect of the temporal resolution on urban water quality modelling is detected analysing the uncertainty of the response of rainfall–runoff modelling. Analyses have been carried out using historical rainfall–discharge data collected for the Fossolo catchment (Bologna, Italy). According to the methodology, the historical rainfall data are taken as a reference, and resampled data have been obtained through a rescaling procedure with variable temporal windows. The shape comparison between ‘true’ and rescaled rainfall data has been carried out using a non-dimensional accuracy index. Monte Carlo simulations have been carried out applying a parsimonious urban water quality model, using the recorded data and the resampled events. The results of the simulations were used to derive the cumulative probabilities of quantity and quality model outputs (peak discharges, flow volume, peak concentrations and pollutant mass) conditioned on the observation according to the GLUE (Generalized Likelihood Uncertainty Estimation) methodology. The results showed that when coarser rainfall information is available, the model calibration process is still efficient even if modelling uncertainty progressively increases especially with regards to water quality aspects.

Road traffic impact on urban water quality: a step towards integrated traffic, air and stormwater modelling

2013 ◽  
Vol 21 (8) ◽  
pp. 5297-5310 ◽  
Author(s):  
Masoud Fallah Shorshani ◽  
Céline Bonhomme ◽  
Guido Petrucci ◽  
Michel André ◽  
Christian Seigneur
Keyword(s):  
Water Quality ◽  
Road Traffic ◽  
Urban Water ◽  
Urban Water Quality ◽  
Traffic Impact

scholarly journals An integrated approach for urban water quality assessment

2011 ◽  
Vol 64 (7) ◽  
pp. 1519-1526 ◽  
Author(s):  
A. S. Beenen ◽  
J. G. Langeveld ◽  
H. J. Liefting ◽  
R. H. Aalderink ◽  
H. Velthorst
Keyword(s):  
Water Quality ◽  
Drainage System ◽  
Water Quality Assessment ◽  
Integrated Approach ◽  
Urban Drainage ◽  
Urban Water ◽  
Sewer System ◽  
Urban Drainage System ◽  
Urban Water Quality ◽  
Receiving Water

This paper introduces an integrated approach for the assessment of receiving water quality and the relative contribution of the urban drainage system to perceived receiving water quality problems. The approach combines mass balances with relatively simple receiving water impact models. The research project has learned that the urban drainage system is only one of the determining factors with respect to receiving urban water quality problems. The morphology of the receiving waters and the non-sewer sources of pollution, such as waterbirds, dogs, or inflow of external surface water might be equally important. This conclusion underlines the necessity to changes today's emission based approach and adopt an integral and immission based approach. The integrated approach is illustrated on a case study in Arnhem, where the receiving water quality remained unsatisfactory even after retrofitting a combined sewer system into a separated sewer system.

scholarly journals Regulatory and Resource Management Practices for Urban Watersheds: The Florida Experience

2012 ◽  
Vol 22 (4) ◽  
pp. 418-429 ◽  
Author(s):  
Richard O. Carey ◽  
George J. Hochmuth ◽  
Christopher J. Martinez ◽  
Treavor H. Boyer ◽  
Vimala D. Nair ◽  
...  
Keyword(s):  
Water Quality ◽  
Resource Management ◽  
Atmospheric Deposition ◽  
Management Practices ◽  
The United States ◽  
Nutrient Concentrations ◽  
Septic Systems ◽  
Urban Watersheds ◽  
Urban Water ◽  
Urban Water Quality

Urban water quality management is becoming an increasingly complex and widespread problem. The long-term viability of aquatic ecosystems draining urban watersheds can be addressed through both regulatory and nutrient and water management initiatives. This review focuses on U.S. regulatory (federal, state, and local) and management (runoff, atmospheric deposition, and wastewater) impacts on urban water quality, specifically emphasizing programs in Florida. Because of rapid population growth in recent decades, and projected increases in the future, appropriate resource management in Florida is essential. Florida enacted stormwater regulations in 1979, before the U.S. Environmental Protection Agency (USEPA) amended the Clean Water Act (CWA) to regulate stormwater discharges. However, in the United States, more research has been conducted on larger structural best management practices (BMPs) (e.g., wet ponds, detention basins, etc.) compared with smaller onsite alternatives (e.g., green roofs, permeable pavements, etc.). For atmospheric deposition, research is needed to investigate processes contributing to enhanced deposition rates. Wastewater (from septic systems, treatment plants, and landfills) management is especially important in urban watersheds. Failing septic systems, elevated nutrient concentrations in discharged effluent, and landfill leachate can all potentially degrade water quality. Proposed numeric nutrient criteria from the USEPA and innovative technologies such as bioreactor landfills are emergent regulatory and management strategies for improved urban water quality.

scholarly journals Characterization and Modeling of Urban Water Quality in the City of Calgary, Canada

2017 ◽  
Vol 08 (08) ◽  
pp. 513-530
Author(s):  
Dhiraj Shrestha ◽  
Jianxun He
Keyword(s):  
Water Quality ◽  
Urban Water ◽  
Urban Water Quality ◽  
The City
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