6,061 Works

Quantification of sewer exfiltration - a review

M. Rutsch, J. Rieckermann & P. Krebs
One of the goals of the APUSS project (Assessing Infiltration and Exfiltration on the Performance of Urban Sewer Systems) is to assess sewer exfiltration, in order to support cities and operators to define problem-oriented rehabilitation strategies. In this paper, we review various methods currently used for the estimation of exfiltration and discuss data needs and applicability for rehabilitation planning. Although, each approach has its individual advantages and drawbacks, we identified pressure tests and tracer methods...

Using decision analysis to determine optimal experimental design for monitoring sewer exfiltration with tracers

J. Rieckermann, M. E. Borsuk & W. Gujer
The tracer methods developed to assess exfiltration from sewers in the European project APUSS (Assessment of the Performance of Sewer Systems) have a high degree of freedom with regard to the choice of tracer and the dosing strategy. These can lead to very different degrees of uncertainty in the measured exfiltration ratio. In this study, we demonstrate how to select an optimal experimental design using decision analysis, which accounts for this uncertainty and its associated...

Application of case-based reasoning to support the management of experimental constructed wetlands treating gully pot liquor

M. Scholz & B. H. Lee
The aim was to predict the treatment efficiencies for gully pot liquor of experimental vertical-flow constructed wetland filters containing Phragmites australis (Cav.) Trin. ex Steud. (common reed) and filter media of different adsorption capacities. Six out of twelve filters received inflow water spiked with metals. For two years, hydrated nickel and copper nitrate were added to sieved gully pot liquor to simulate contaminated primary treated storm runoff. For those six constructed filters receiving heavy metals,...

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....

Sampling for representative micropollutant loads in sewer systems

C. Ort & W. Gujer
Most commercially available auto-sampling devices do not support a continuous flow-proportional sampling mode, which would conceptually be the best for collecting representative composite samples. Instead different discrete sampling modes are available. Household chemicals can show considerable random short-term variations. With the anticorrosive benzotriazole, relating to a middle-frequent household activity, we show that, besides an accurate flow meter, mainly three factors are decisive for the representativeness of a substance\342\200\231s average load: the substance\342\200\231s load pattern, the...

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...

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...

Experimental investigation of continuous deflective separation for particle fractions transported by rainfall-runoff

J.Y. Kim, S. Pathapati, S. Ganguly, W. Bartler & J. Sansalone
This study examined the event-based performance of continuous deflective separation (CDS) for removal of particle fractions transported in actual rainfall-runoff from a 1088-m2 source area paved urban watershed. Four independent rainfall-runoff events were examined and the entire volume of runoff and particulate matter from each event was treated by the continuous deflective separator at the full-scale treatment facility located on I-10 over City Park Lake in Baton Rouge, Louisiana, USA. Significant removal (> 90 %)...

Development of the San Diego creek natural treatment system

E. Strecker, P. Mangarella, N. Brandt, T. Hesse, K. Rathfelder & M. Leisenring
A Natural Treatment System (NTS) Master Plan that includes a watershed-wide network of constructed wetlands was evaluated for treatment effectiveness of dry weather base flows and runoff from smaller more frequent storms in a 120 square mile (311 km2) urban watershed. The goal of the \342\200\230regional retrofit\342\200\231 wetland network is to serve as an integral component in watershed-wide Best management Practices (BMPs) for compliance with pollutant loading limits (TMDLs) requiring discharge limits of sediments, nutrients,...

Matching the critical portion of the flow duration curve to minimize changes in modeled excess shear

C.A. Rohrer & L.A. Roesner
Hydrologic and hydraulic modeling in the USEPA Stormwater Management Model (SWMM) were used to examine the effectiveness of typical stormwater management practices in reducing the potential for stream erosion. Fifty-year continuous simulations were used to produce flow duration curves and stream erosion rates for a variety of critical shear stress values representative of both cohesive and non-cohesive sediments. An excess shear stress erosion potential index was used to evaluate changes in erosion between undeveloped conditions...

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...

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...

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...

Physical effects of wet weather discharges on aquatic habitats - Present knowledge and research needs

L.A. Roesner, B.P. Bledsoe & C.A. Rohrer
This study explores the current state of knowledge with respect to the effects of wet weather flows from urban areas on the physical character of aquatic habitat. It identifies knowledge gaps with respect to our ability to define the cause-effect relationships, examines the comprehensiveness of the data used in support of the published literature in the subject area, and makes a qualitative determination of the usefulness of those data for further analysis to increase our...

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...

Alternative engineering solutions for water pollution minimization from urban drainage systems - The case of Rio de Janeiro, Brazil

& Jord\303\243o E.P.
Tropical climate countries use separate, instead of combined sewer systems. However, legal and illegal sewage connections to the urban drainage system result into local water resources pollution. This paper discusses the problem causes, and shows local, alternative and original solutions that have been adopted in recent years for its minimization in Rio de Janeiro State. It presents practical examples of engineering solutions, emphasizes their applicability, advantages and disadvantages, as a contribution for the theme discussion...

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...

Assessing the impact of infiltration and exfiltration in sewer systems using performance indicators: case studies of the APUSS project

M.A. Cardoso, V. Prigiobbe, M. Giulianelli, E. Baer, J. De B\303\251n\303\251dittis & S.T. Coelho
The structural quality and functional efficiency of sewer systems are key parameters to guarantee the transfer of domestic, commercial and industrial wastewater to treatment plants without infiltration nor exfiltration. Infiltration of groundwater is particularly detrimental to treatment plant efficiency, while exfiltration of wastewater can lead to groundwater contamination. The APUSS project associating universities, SMEs and municipalities in 7 European countries, developed new methods and techniques to assess and quantify infiltration and exfiltration (I/E) in sewer...

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...

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...

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...

Quality of stormwater runoff from paved surfaces of two production sites

I. Gnecco, C. Berretta, L.G. Lanza & P. La Barbera
In order to investigate stormwater pollutant loads associated with different anthropic activities and the related pollutant build-up and wash-off processes, two pilot sites have been equipped in the Liguria Region (Italy) for monitoring first flush water quality in a gas station and an auto dismantler facility. TSS, COD, HCtot and heavy metals in dissolved form (Zn, Pb, Cu, Ni, Cd, Cr) have been analyzed during the monitoring campaign (started in February 2004). Stormwater flow and...

Registration Year

  • 2022
    310
  • 2021
    543
  • 2020
    283
  • 2019
    563
  • 2018
    40
  • 2017
    14
  • 2016
    2
  • 2015
    4
  • 2014
    259
  • 2013
    1

Resource Types

  • Text
    4,039
  • Dataset
    946
  • Event
    746
  • Collection
    86
  • Audiovisual
    68
  • Other
    51
  • Software
    43
  • Report
    34
  • Image
    24
  • Dissertation
    23
  • Preprint
    1

Affiliations

  • Technical University of Denmark
    112
  • Hellenic Centre for Marine Research
    4
  • London School of Hygiene & Tropical Medicine
    2
  • Centro de Investigación Biomédica en Red, Enfermedades Neurodegenerativas
    2
  • Aarhus University
    2
  • University of East Anglia
    2
  • Aalborg University
    2
  • Centre for Environment, Fisheries and Aquaculture Science
    2
  • Autonomous University of Barcelona
    2
  • Nagasaki University
    2