420 Works

USEtox® 2.0 Documentation (Version 1.00)

Peter Fantke, Marian Bijster, Michael Zwicky Hauschild, Mark Huijbregts, Olivier Jolliet, Anna Kounina, Violaine Magaud, Manuele Margni, Tom E. McKone, Ralph K. Rosenbaum, Dik Van De Meent & Rosalie Van Zelm

Communication Technologies Support to Railway Infrastructure and Operations

Aleksander Sniady
GSM-Railways (GSM-R), which is state-of-the-art railway mobile communication technology, is gradually replacing legacy analogue radio systems. Although GSM-R is an unquestionable achievement in terms of European railway interoperability, from a telecommunication point of view, it is an obsolete technology. In the research work presented in this thesis, GSM-R technology is analysed and its main shortcomings are identified, namely: lack of capacity, limited data transmission capabilities, and inefficiency in radio resource usage. Due to these significant...

A general algorithm for the development of control algorithms for RTC of sewer systems

M. Sch\303\274tze, J. Alex & M. Ogurek.
Despite the large number of publications on the topic of real time control (RTC) of urban drainage systems, there are, however, only few indications on how a control algorithm for a particular case study is actually determined. Often, this involves an time-consuming and costly heuristic procedure, based on the expertise and intuition of the person carrying out such study. This paper presents a generic procedure for the set up of RTC strategies. Essentially RTC control...

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...

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...

Pollution based real time control of a combined sewer overflow structure

K. Klepiszewski
Real time control processes in combined sewer systems are normally based on measurements of the hydraulic load conditions in the system. Dependent on the conditions, the flow in the system is adjusted to optimise the utilisation of available storage volume, to reduce discharged volume and pollutant loads into receiving water courses, and to support the operation of waste water treatment plants. Moreover, if the focal point of interest is the reduction of emitted pollutant loads...

A new overflow measurement device

H. Brombach & G. Weiss
A new broad-crested type of a wing-shaped overflow weir was developed and calibrated to meet the needs of monitoring combined sewer overflows in urban drainage systems. The main problem with existing sharp-crested weirs are hysteresis and inaccuracy at low overflow heads. The airfoil type weir shows a very broad measurement range from Qmin/Qmax of about 1/10,000. Rating curves calibrated in the hydraulic laboratory with and without upstream scumboards are introduced. The weir profile is bent...

Enhancement of oil retention and biodegradation in pervious pavements and infiltration systems

T. Puehmeier, D. De Dreu, J.A.W. Morgan, A. Shuttleworth & A. P. Newman
This paper reports recent developments in oil trapping and oil biodegrading systems in pervious pavements and in infiltration systems used in conjunction with non-pervious surfaces. The advances made in the technology and operation of pervious surfaces fitted with an integrated oil water separator will be described. This involves a newly developed, floating mat system which serves to interact with any oil which, in the event of a large spill, passes through the initial oil retaining...

The stormwater ambassador program - A community education partnership between schools and local government

G. Mashiah & H. TyasTunggal
The Stormwater Ambassador program is an environmental education partnership between schools and local government which supports students selected by their schools as \342\200\234ambassadors\342\200\235 to promote stormwater and water cycle awareness within the community. Ambassadors learn about the catchment which they live in and related water issues during workshops held each school term, and then develop and implement ideas promoting community awareness. Ambassadors\342\200\231 activities have included regular newspaper columns and community newsletters, school assembly presentations, drain...

Advanced stormwater runoff characterization

M. Kayhanian
During the past seven years the California Department of Transportation has developed an extensive stormwater characterization program to evaluate the physical, chemical and biological quality of the runoff from their representative facilities. Initially the program has utilized many laboratories and environmental consultants who may not have necessarily used the same method of sample collection, quality assurance and quality control, data reporting and data validation standards. Faced with this deficiency, a set of standard protocols and...

Random number generator or sewer water quality model ?

P. Willems
Integrated urban drainage modelling and environmental impact assessment require sewer emission models to be linked with submodels for treatment infrastructure and receiving rivers. The uncertainty in current water quality modelling is, however, huge, and environmental impact assessment looses more and more credibility. Based on an integrated modelling case for a combined sewer \342\200\223 WWTP \342\200\223 river system, it is shown in the paper that the integrated model does not produce more accurate results in comparison...

Comparison of infiltration flows at three types of infiltration facilities in serial rainfall events with different characteristics

M. Murakami, H. Furumai, F. Nakajima, H.K.P.K. Jinadasa & R.K. Aryal
Infiltration facilities function for the groundwater recharge, retention of non-point pollutants as well as the reduction of stormwater peak flow in urban areas. Although there have been several simulation researches focusing on reduction of stormwater peak flow by introduced infiltration facilities, limited simulations have been done to estimate the water balance and discuss the characteristics of infiltration flows. In this study, runoff quantity simulation was carried out to compare the contribution of infiltration volume for...

Optimization of sediment trap configuration using CFD modelling for Indian drainage systems

K. Gupta, P. Mehta, T. Thinglas, S.J. Tait & V. Stovin
The flow capacity of urban stormwater drainage channels in major cities of India are gradually being reduced due to increased quantities of solid waste being introduced into these systems. During low flows, the solid waste forms deposits within these open drainage channels. These must be regularly cleaned to ensure that the drains function at an optimal hydraulic capacity in order to limit overflows. This places a significant burden on the operators of these systems. The...

Analysis of one year weather radar data for use in a rainfall runoff model

M. Jessen, T. Einfalt & C. Golz
One year of continuous rainfall measurements from weather radar and raingauges have been analysed and prepared for use in a hydrological rainfall runoff model. A major effort of data quality control (quality check and data correction) was required to produce reliable data. The employed corrections included data modifications because of the occurrence of ground clutter, beam blockage and bright band. The corrected and adjusted data compared well on raingauge stations not used for the adjustment...

Characteristics of washed-off pollutants and dynamic EMCs in a parking lot and a bridge during storms

K. Lee-Hyung, K. Lim & S. Ko
ABSTRACT Since the water quality has been recognized as a big issue in drinking water sources, the Ministry of Environment, Korea, are designing the TMDL program for major large rivers. In order to settle the TMDL program successfully, nonpoint pollutants causing from various landuses should be controlled. Especially paved areas such as parking lots and bridges are stormwater intensive landuses because of high imperviousness and high pollutant mass emissions from vehicular activity. Vehicle emissions from...

Experience feedback on best management practices for urban stormwater drainage: An assessment of their performance and perception

C. Martin, Y. Ruperd, M. Jauner & M. Legret
Reliance upon "Best Management Practices" (BMPs) is becoming increasingly widespread in the field of stormwater source control. The main objective inherent in the use of such stormwater solutions is to prevent against flooding and sanitary problems within urban areas. A wide array of stormwater source control solutions exists, and the choice of one versus another often depends on a large number of criteria related to the hydraulic, technical, environmental, operations & maintenance, social and economic...

Full scale testing of enhanced local treatment of CSOs enabling a cost-efficient implementation of the EU Water Framework Directive

N.K. Andersen, P. Hallager, A. Laustsen, J.B. Nielsen, N.T.D Kristensen, P. Nordemann, W. Rauch, G.G. Nielsen & K. Arnbjerg-Nielsen
There is a definite need for full-scale applications on which to judge the efficiency of novel processes for local treatment of combined sewer overflows (CSO). Three full-scale facilities are constructed to study typical types of CSO discharges: 1) Discharges from small upstream catchments to small watercourses, 2) Discharges from larger catchments to larger surface water, and 3) Discharges to marine coastal waters where bathing is permitted. The paper outlines the proposed technologies and discusses the...

Computer Aided Rehabilitation of Water Networks (CARE-W)

S. S\303\246grov & W. Schilling
CARE-W is a computer based system for water network rehabilitation planning. It provides fundamental instruments for estimating the current and future condition of water networks, i.e. performance indicators, selecting and ranking of rehabilitation projects and long-term investment needs. The procedure for selection and ranking of projects is supported by tools for prediction of network failures and calculation of water supply reliability. The research project CARE-W was finished in 2004 and is now available for practical...

Performance of a High-Rate Sedimentation Process for Combined Sewerage Treatment in Wet Weather

K. Suzuki, T. Fujihashi, S. Kosanda, H. Hinuma & R. Hata
A novel high-rate sedimentation process has been developed for directly treating combined sewer overflows (CSOs). This was done using a test facility at an actual wastewater treatment plant in Tokyo. Pilot test results, carried out 13 times, from December 2002 to July 2003 in wet weather, suggested that the process was suitable for treatment of CSOs. The performance of the process was favorable at 50 m3/(m2 ∙h) up to 880 mg/L influent TSS, removing between...

On the selection of rainfall-runoff algorithm in Canada

D. Hansen, S. Ranade & C. R. Hansen
Choice of rainfall-runoff algorithm is obviously a central aspect of urban drainage design. Although it is known that the size and imperviousness of the watershed have a bearing on the choice of algorithm, there is in Canada little evidence that any one algorithm is strongly preferred by most practitioners for application to a given design setting, and less evidence of any one algorithm being broadly specified in Canadian municipal regulations. If a given algorithm is...

Agil Stage-Gate®: Ny model for udviklingsprojekter i mellemstore virksomheder

Tomas Vedsmand, Kasper Edwards, Nicoline Hvidt, Michael Nielsen & Jens Kristian Jørgensen

Stormwater inflow prediction using radar rainfall data compressed by principal component analysis

K. Katayama, K. Kimijima, O. Yamanaka, A. Nagaiwa & Y. Ono
This paper proposes a method of stormwater inflow prediction using radar rainfall data as the input of the prediction model constructed by system identification. The aim of the proposal is to construct a compact system by reducing the dimension of the input data. In this paper, Principal Component Analysis (PCA), which is widely used as a statistical method for data analysis and compression, is applied to preprocessing radar rainfall data. Then we evaluate the proposed...

Dynamic least-cost optimisation of wastewater systems remedial works requirements

Z. Vojinovic, D. Solomatine & R. K. Price
In recent years there has been increasing concern for wastewater system failure and identification of optimal set of remedial works requirements. So far, several methodologies have been developed and applied in asset management activities by various water companies worldwide but often with limited success. In order to fill the gap, there are several research projects that have been undertaken in exploring various algorithms to optimise remedial works requirements but mostly for drinking water supply systems...

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