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November 2009 - April 2010
June 2006 - March 2013
September 2005 - March 2006
Publications
Publications (30)
Due to climate change, heavy rain events occur more frequently, causing damage in urban and rural areas through flooding. In order to reduce the risk for buildings and infrastructure, measures such as the areal retention of precipitation are necessary.In Austria, around 32% of the total area is used for agriculture and can thus contribute significa...
Over the last decades an increase in urban flash floods due to heavy storm events can be observed. This leads to significant risks and damage to housing and infrastructure. In scope of the RAINMAN project, pilot studies were conducted for several catchments using an integrated 1D-2D hydraulic model. This contribution discusses model sensitivity bas...
Discharges of untreated wastewater from combined sewer overflows (CSOs) can affect hydraulic stress and have significant environmental impacts on receiving water bodies. Common flow rate and water level sensors for monitoring of CSO events are expensive in terms of investment costs, installation, operation and maintenance. This paper presents a nov...
Kurzfassung Durch die Umsetzung der EU-Wasserrahmenrichtlinie kommt der Charakterisierung von Mischwasserüberläufen in Zukunft mehr Bedeutung zu. Messmethoden zur Überwachung von Mischwasserüberläufen wie Wasserstand oder Durchfluss sind teuer in Anschaffung und Betrieb. Der Fokus dieses Beitrags liegt in der Anwendung einer alternativen, kostengün...
Combined sewer overflows (CSOs) can lead to hydraulic stress, oxygen depletion or temporary increase of pollutant concentrations in receiving waters. The implementation of the European Water Framework Directive is pushing towards the characterisation of CSOs. Common measurement methods for CSO monitoring like flow or water level sensors are expensi...
Kurzfassung Der Haupteintrag von Schmutzstoffen an Mischwasserentlastungen in Oberflächengewässer findet durch an Feststoffe adsorbierte Partikel statt. Die Sedimentationsleistung von Mischwasserüber-laufbecken kann daher eine wesentliche Aussage über den Schmutzstoffrückhalt liefern. Im Einzugs-gebiet der Kläranlage Linz-Asten wird rund 60 % der G...
The effluent of waste water treatment plants (WWTPs) as well as combined sewer overflows (CSOs) and stormwater discharges from urban areas and highways represent entry path for micropollutants in surface water bodies. Representative sampling of storm events constitutes the first step to estimate emitted micropollutant loads. The obtained informatio...
River basin wide planning for assessing the ecological and chemical status of surface water bodies calls for integrated modelling of the river and the connected urban water systems. Challenges were identified in the effort to set up such models and in general data availability for such studies. The Austrian interuniversity project IMW3 is dedicated...
While several approaches for global sensitivity analysis (GSA) have been proposed in literature, only few applications exist in urban drainage modelling. This contribution discusses two GSA methods applied to a sewer flow and sewer water quality model: Standardised Regression Coefficients (SRCs) using Monte-Carlo simulation as well as the Morris Sc...
A framework for downscaling precipitation from RCM projections to the high
resolutions in time and space required in the urban hydrological climate change impact
assessment is outlined and demonstrated. The basic approach is that of Delta Change,
developed for both continuous and event-based applications. In both cases, Delta Change
Factors (DCFs)...
The new Guideline 19 on the design of mixed-sewage discharge issued by the Austrian Water and Waste Management Association (ÖWAW) in October 2007 defines the Austrian state of the art in the design of mixed-sewage discharge facilities. This new guideline provides that a so-called minimum level of conveyance efficiency (that is the proportion of pre...
In many countries traditional simple design approaches for combined sewer overflow (CSO) structures and storage tanks are used in general practice, neglecting the significant variability observed in real systems. In this paper, two hydraulic software simulation tools and two stormwater quality model approaches are compared to assess CSO behaviour a...
Over the last three decades, storm-water quality modeling has been used increasingly commonly to describe the general system behavior and assess the pollution loads transferred in and spilled out of combined sewer systems. The calibration of quality models is, in most cases, based on conventionally obtained calibration data, e.g., by automated samp...
Over the last three decades, stormwater quality modeling has been used increasingly commonly to describe the general system behavior and assess the pollution loads both transferred in and spilled out of combined sewer systems. The calibration of quality models is, in most cases, based on conventionally obtained calibration data, e.g. by automated s...
The effect of the simulation time step on parameters in hydrological models is demonstrated and approaches for solving the problem are presented
The paper recalls a phenomenon in hydrological modelling which the main author discovered first in 1980. The study is based on high resolution data from a catchment in Austria operated by TU Graz over more than 30 years. The results are convincing.
It should be noted that the paper was submitted to HESS in November 2009, but rejected immediately b...
Pollutant load modelling for sewer systems is state-of-the-art, especially for the estimation of discharged pollutant loads and development of sewer management strategies. However, conventionally obtained calibration data sets are often not exhaustive and have significant drawbacks. In the Graz West catchment area (Graz, Austria), continuous high-r...
Pollutant load modelling for sewer systems is state-of-the-art, especially for the estimation of discharged pollutant loads and development of sewer management strategies. However, conventionally obtained calibration data sets are often not exhaustive and have significant drawbacks. In the Graz West catchment area (Graz, Austria), continuous high-r...
Hydraulic works and land-use changes usually induce an acceleration of runoff throughout the catchment, which can locally enhance erosion, damage riverine ecosystems and worsen floods. The "Dynamic Slow Down" concept (noted hereafter "DSD") therefore promotes slowing down, using transverse obstacles or small retention works. DSD also encourages ove...
Kurzfassung: Die möglichen Auswirkungen des Klimawandels auf die Siedlungswasserwirtschaft waren Gegenstand vieler Studien in den letzten Jahren. Im EU FP7 Projekt SUDPLAN (www.sudplan.eu) wird ein Decision-Support System entwickelt, das Planer und Betreiber im Umgang mit möglichen Einflüssen durch den prognostizierten Klimawandel auf die städtisch...
EXTENDED ABSTRACT The modelling of rainfall-runoff-transport processes in urban drainage systems is well established and extensively applied and described in the literature (Rauch et al., 2002). The importance of a proper model assessment and a thorough calibration has been highlighted in many scientific studies and is promoted in several publicati...
