383 Works

Long-term preservation of digital content: digital curation

Matthias Töwe

Statistiques d'utilisation: usages au consortium et dans les bibliothèques

Pascalia Boutsiouci & Christian Stutz

Metal and organic content in gully pot mixture

K. Karlsson & M. Viklander
During the cleaning of the gully pot, water has to be added to the gully pot to remove all the sediment. This mixture of gully pot water and sediment, as well as the \342\200\234wash-water,\342\200\235 has to be taken care of. This paper considers the quality of the water phase of this mixture, due to a wide spectrum of metals and organic substances. Three sampling sites were selected according to type of area and traffic intensity....

An analytical model for hydrologic analysis in urban watersheds

P. Rivera, J. Giron\303\241s, J. P. Montt & B. Fern\303\241ndez
ABSTRACT Guo and Adams (1998a, b) presented a methodology to estimate the cumulative distribution function for maximum discharges and total volumes of urban floods based on the rainfall-runoff transformation and the rainfall volume and duration, modeled as independent variables exponentially distributed. Rainfall records in many locations did not show this independency; therefore this model may fail at estimating these distributions. In this paper a new analytical model based on a different characterization of the storms...

New guidelines for planning of real time control for urban drainage systems

M. Sch\303\274tze, U. Haas, M. Scheer & W. Schilling
Recently, the Working Group \342\200\234Real time control\342\200\235 of the German Association for Water, Wastewater and Waste (DWA, formerly: ATV-DVWK) has prepared a guideline document on planning of real time control (RTC) systems for urban drainage catchments. At present, the document is in its consultation phase, its publication as a DWA guideline document is envisaged (in German language) in 2005. This paper summarises its main issues, in order to make the guidelines available to an international...

Socioeconomic impacts on fluvial system an urban watershed in southern Brazil

C. Poleto, G.H. Merten & A.L.L. Silveira
One of the great problems observed in the Brazilian urban watersheds concerns the amount of solid residues, domestic sewerage and sediments that are disposed in the rivers and streams that drain these basins. The present work sought to evaluate these questions through a study of case taken in an urban watershed in the metropolitan region of Porto Alegre, South of Brazil. For this study different procedures have been used, such as field surveys, interviews with...

Technical performance assessment of Inflow effects: experimental urban sewer system in Portugal

M.A. Cardoso, M.C. Almeida & C. David
In separate domestic sewer systems the excess of wastewater volumes in wastewater treatment plants can be due to infiltration into the sewer system from the groundwater, or due to storm water inflows coming from cross connections of storm drains, connected impervious areas and leaking manholes covers. In general, the effects of inflow/infiltration (I/I) are relatively obvious but usually there is no objective information on its quantification, origin and economic impact. The location and detection of...

The integrated unit process design approach for source control and best management practice design

M.M. Quigley, E.W. Strecker, M. Leisenring, W.C. Huber, J. Heaney, N. Weinstein, J. Sansalone & D. Bodine
Research being conducted by the authors under the National Cooperative Highway Research Program project \342\200\234Evaluation of Best Management Practices for Highway Runoff Control\342\200\235 and the Water Environment Research Foundation project \342\200\234Critical Assessment of Stormwater Treatment and Control Selection Issues\342\200\234 seeks to advance the state of the practice of stormwater design through the application of basic scientifically and technically sound engineering principals using a fundamental unit process design methodology. The research findings are being incorporated into...

Comparison between two methodologies for urban drainage decision aid

P.M. Moura, M.B. Baptista & S. Barrraud
The objective of the present work is to compare two methodologies based on multicriteria analysis for the evaluation of stormwater systems. The first methodology was developed in Brazil and is based on performance-cost analysis, the second one is ELECTRE III. Both methodologies were applied to a case study. Sensitivity and robustness analyses were then carried out. These analyses demonstrate that both methodologies bring equivalent results, and present low sensitivity and high robustness. These results prove...

Distribution of phosphorus for particulate

J. Ma, J. Sansalone & P. Veltri
Urban rainfall-runoff transports loads of particulate matter and total phosphorus (TP) from a variety of anthropogenic activities. Discharge of diffuse sources of phosphorus as a leading cause of receiving water eutrophication has received significant attention. Elevated phosphorus concentrations in rainfall-runoff have been commonly identified for many urban land uses. In some cases these phosphorus concentrations can approach levels of untreated wastewater plant influent. Particulate matter is also entrained with phosphorus in urban rainfall-runoff and this...

Highway runoff characteristics in coastal areas \342\200\223 A case study in Aveiro, Portugal

P. A. Antunes & A. E. Barbosa
In the framework of a study for the Portuguese Road Institute, the authors carried out a monitoring study of the IP5 highway, located at the coast line. The TSS and the turbidity values measured in 40 runoff samples were relatively low, resulting from the low potential of the drainage area and surroundings to contribute with solids. Heavy metals results (Fe, Zn, Cu, Pb, Cd and Ni) were in accordance with other studies. It was confirmed...

Performance indicators for rehabilitation end-users field testing results

M.A. Cardoso & R. Matos Almeida
CARE-S - Computer Aided Rehabilitation of Sewer Networks is a project funded by the 5th EU Framework Programme. The project goal is to establish a rational framework for decision-making support on sewer network rehabilitation. CARE-S aims to develop an integrated and systematic methodology for rehabilitation. The final aim is to contribute to improve the structural and functional reliability of the sewer networks. The main deliverable will be a Decision Support System (CARE-S prototype) to assist...

Seasonal flood frequency analysis based on disaggregated urban runoff data

B. V. Matheussen, S. T. Thorolfsson & D. P. Lettenmaier
Current design procedures for urban drainage systems are based on the assumption that it is short duration summer rainfall that produces the highest annual runoff peaks. Despite this several researchers report that in cold climates urban flooding may also happen as a consequence of rain in combination with snowmelt. Because of this we chose to question the assumption of rainfall being the only factor controlling urban flooding in cold climates like in Trondheim, Norway. Through...

Plant-covered retention soil filters (RSF) Fulda Fellenweg for advanced CSO treatment - a ten year field report

F. Frechen, W. Schier & J. Felmeden
Massive improvement of municipal wastewater treatment during the last 20 years has reduced the pollution load of our water bodies significantly. At the same time, pollution load resulting from combined sewer overflows (CSO) increased which made appropriate countermeasures necessary. Up to now, this is usually done by introducing combined wastewater basins in accordance to the German ATV Standard A128 (ATV, 1992), which deals with design and construction of this type of installations. However, the effect...

Assessment of CSO loads \342\200\223 based on UV/VIS spectroscopy by means of different regression methods

M. Hochedlinger, H. Kainz & W. Rauch
The use of UV/VIS-spectroscopy for water quality measurements is based on the solution of the correlation between the surrogate parameter absorbance and the resulting equivalence parameters. The coherence of absorbance and equivalence parameters (CODtot, CODsol, TSS) will be solved in this paper with different regression methods. The correlation of absorbance and concentrations are analysed based on linear regression methods, model tree regressions, multivariate regression methods and support vector machines using sequential minimal optimisation algorithm. For...

Water quality performance of SUDS ponds analysed on a WQI

A. Spitzer & C. Jefferies
Results from a three year water quality (WQ) monitoring in two SUDS ponds are presented and the use of a water quality index (WQI) as a method for determining the WQ performance of Sustainable Urban Drainage Systems (SUDS) is proposed. WQ data were collected at the inlets and outlets of the Halbeath and Linburn ponds, located in adjacent catchments in the Dunfermline Eastern Expansion Area (DEX) in Eastern Scotland. Pond inflows and outflows were analysed...

The DayWater decision support approach to the selection of sustainable drainage systems: A multi-criteria methodology for BMP decision makers

J. B. Ellis, J. C. Deutsch, M. Legret, C.Martin, D. M. Revitt, L. Scholes, H. Seiker & U. Zimmerman
The decision-making process for the selection of Best Management Practice (BMP) systems for stormwater runoff management involves a variety of stakeholders within public and private sectors holding differing powers and opinions regarding the significance they attribute to differing criteria. The paper describes a web-based multi-criteria analysis (MCA) approach being developed within the EU 5th Framework DayWater project (www.daywater.org) to support stakeholder negotiation and the development of mutually acceptable sustainable solutions to the problem of control...

Spatial variability of PAH load of urban wet weather pollution in combined sewers

J. Gasperi, R. Moilleron & G. Chebbo
The OPUR research programme created in Paris an experimental on-site observatory of urban pollutant loads in combined sewer systems in order to characterise the dry and wet weather flows, at different spatial scales. This article presents the first results on the spatial variability of the PAH load during wet weather flow (WWF). At the scale of a rain event, investigations revealed that (i) PAH concentrations were relatively homogenous whatever the spatial scale and were greater...

Winter water quality profiles for a stormwater pond in southern Sweden

A. Semadeni-Davies
Profiles of conductivity, temperature, dissolved oxygen (DO) and pH were made for B\303\244ckasl\303\266v stormwater pond (ca. 1.8 ha, average depth 1.6 m) in V\303\244xj\303\266, south Sweden, over two winters (2001-2 and 2002-3). The first winter had mild and wet conditions while the second was cold and dry. The pond was at least partially ice covered over both winters. Readings were taken at 20 cm vertical intervals approximately every fortnight from December to April at three...

The Flemish CSO monitoring network revisited

R. Bouteligier, G. Vaes & J. Berlamont
In 1998 a combined sewer overflow (CSO) monitoring network was established by the Water division of the Administration of Environment, Nature, Land and Water Management AMINAL (Ministry of Flanders, Department of Environment & Infrastructure). At the end of the measuring campaign 19 CSOs were being monitored. As a result data for five consecutive years are available at a number of CSO locations. This paper presents the results of a research project carried out by the...

Modelling of snowmelt and rainfall runoff - Dynamics of road runoff and suspended solid transport

C. Westerlund, M. Viklander & C. Hernebring
In this paper, a simple model concept is presented to describe the dynamics of road runoff and suspended-solid transport from a small urban catchment in northern Sweden. The study period stretches from March 28 to May 28, 2000, including both snowmelt and rainfall. A modified degree-day method is used to describe the snowmelt and the transport of suspended solids is described by a linear build-up function and a wash-off model. The model was verified through...

Dynamics of the nitrogen transformation in a shallow stream and possible interventions

I. Kabelkova-Jancarkova
This paper presents the assessment of the efficiency of the main biological nitrogen transformation processes in a shallow well-oxygenated river and conditions under which they are active and stabilize. The process dynamics was studied with the help of mathematical modelling of two years on-line data series measured in a reach of the Toess River, Switzerland. The algal nitrogen uptake was very stable and unaffected by most but frequent flood events. Daylight photosynthetic nitrogen uptake stabilized...

A coupled sewer system and WWTP modelling approach to minimise annual discharge: a case study

C. Beck, K. Le Roy & A.-G. Sadowski
Urban rainy weather effluents, in spite of dilution effects, could represent a major cause of pollution for receiving water when directly rejected at CSO\342\200\231s or inducing wastewater treatment plant malfunction, conducting to immediate or cumulative impacts. In this study, we reconsider the operating mode of an activated sludge wastewater treatment plant (WWTP) and the dimensioning of its storm basin, seeking to minimise total rejected flows at annual scale, while maximising rainy weather flows through these...

Treatment of CSO water using floating plant beds

L. Buts, C. Thoeye & G. De Gueldre
A pilot installation treating a combined sewer overflow (CSO) at Bornem, Flanders is built. The construction comprises a presettler and a plug flow treatment zone with floating vegetation elements. The installation is aimed to treat efficiently a so-called two-year overflow event of 2,309 m\302\263 volume and 0.17 m\302\263/s peak flow. During the past three years a number of overflow events were registered. Initially the system performed well, with an observed COD-removal efficiency of 68% and...

Registration Year

  • 2011

Resource Types

  • Event