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Suche nach „[Wolfgang] [Dorner]“ hat 175 Publikationen gefunden
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    TC Freyung

    Vortrag

    Wolfgang Dorner, et al.

    Design eines Location-based Services unter Berücksichtigung von Indoor- und Outdoor-Funktionalität

    AGIT, Salzburg, Österreich

    2011

    TC Freyung

    Vortrag

    Wolfgang Dorner, et al.

    Geodaten in der Strömungsmodellierung – eine hydrotechnische Bewertung der Ermittlung und Zuweisung von Rauigkeitsbeiwerten

    Oral Presentation

    2009

    TC Freyung

    Hochschulschrift

    Wolfgang Dorner

    Environmental economic aspects of river basins and their catchment

    Identification and quantification of flood related land use externalities

    2009

    Abstract anzeigen

    This thesis investigates a common problem of land use impacts on flood damage costs on a catchment scale. It does this through a particular case study, to quantify the technical upstream-downstream dependencies and highlights the externalities through hydroeconomic analysis of flood damages and mitigation costs. The substantive content of the project is cross disciplinary. Peak and volume of river flows are functions of the catchment surface characteristics. This means that any impacts to the run-off regime (for example surface sealing or river training) could affect people and land users in the lower catchment. Thus, upstream activities can cause higher flood peaks, and also entail higher damages downstream. These damages are either borne by the affected parties or they are mitigated by state financed flood defence works or offset with financial compensation. These costs are usually not included in the economic considerations of the upstream land user who is partially causing them. In economic terms, these effects are referred to as unidirectional externalities. This means that a producer can export parts of his production costs to third parties and these are not included in the price of the product. The Herzogbach is a small tributary of the Danube River in Lower Bavaria. It is located in a rural area, dominated by intensive farming practices. Two villages (Bachling and Buchhofen) in the headwaters and middle section of the catchment and one city (Osterhofen) in the lower catchment were analysed to determine the impact of upstream land use practices on the flood situation. A combination of hydrological and hydraulic modelling provided the core data to allow the interpretation of economic data, using methods of cost damage estimation. A hydrological model of the catchment provided hydrograph simulations based on (a) a regionalisation approach, (b) hydrologic flood routing and (c) hydrologic reservoir routing. A two dimensional stream flow model was then used to convert the hydrographs into flood levels, to simulate the run-off in settled areas and determine the flood affected areas, flood levels and flow velocities. Estimates for flood damages or mitigation costs resulting from different hydrological scenarios were compared. The scenarios are based on different land uses and allow economic externalities to be estimated. It was found that intensive farming and river training increase the peaks, shape and volume of flood waves in comparison to extensive land use, grassland or forest. In the study area, especially river training reduced the detention effect of the river bed and the natural flood plain. These significant changes to the natural run-off regime directly affect land use in the lower catchment through flood damages and increased flood risk, and by reducing the effectiveness of planned or existing flood protection works. The thesis concludes with linked technical and economic findings which indicate a rich potential new area for research - “hydroeconomics”. The published literature shows few people have worked in this cross disciplinary area. The technical finding is that changes to land use, especially in agriculture, can increase the flood damages in downstream settlements or increase the cost of flood mitigation works significantly. From an economic point of view, this is a unidirectional externality which should be considered in catchment and flood management. Possible solutions could include the control of land use and instruments such as separate waste water fees for rainwater and sewage or run-off certificates.

    TC Freyung

    Vortrag

    Wolfgang Dorner

    Experimental Graphic Semiology - Riskcatch

    2009

    TC Freyung

    Vortrag

    Wolfgang Dorner, et al.

    GIS-Unterstützung zur Umsetzung der Hochwasserrahmenrichtlinie – Überlegungen zur Datenhaltung und erste Versuche der Übertragung der Ergebnisse der Lärm- und Luftrichtlinie

    Oral Presentation

    2009

    TC Freyung

    Zeitschriftenartikel

    S. Fuchs, K. Spachinger, Wolfgang Dorner, J. Rochmann, K. Serrhini

    Evaluating cartographic design in flood risk mapping

    Environmental Hazards, vol. 8, pp. 52-70

    2009

    Abstract anzeigen

    In order to mitigate flood hazards and to minimize associated losses, technical protection measures have been additionally and increasingly supplemented by non-technical mitigation, i.e. land-use planning activities. This is commonly done by creating maps which indicate such areas by different cartographic symbols, such as colour, size, shape and typography. Hazard and risk mapping is the accepted procedure when dealing with natural hazards and is therefore required in the European Member States in order to meet the demands of the European Flood Risk Directive. However, available information is sparse concerning the impact of such maps on different stakeholders, i.e. specialists in flood risk management, politicians and affected citizens. The lack of information stems from a traditional approach to map production which does not take into account specific end-user needs. In order to overcome this information shortage the current study used a circular approach such that feedback mechanisms originating from different perception patterns of the end user would be considered. Different sets of small-scale as well as large-scale risk maps were presented to different groups of test persons in order to (1) study reading behaviour as well as understanding and (2) deduce the most attractive components that are essential for target-oriented communication of cartographic information. Therefore, the method of eye tracking was applied using a video-oculography technique. This resulted in a suggestion for a map template which fulfils the requirement to serve as an efficient communication tool for specialists and practitioners in hazard and risk mapping as well as for laypersons. Taking the results of this study will enable public authorities who are responsible for flood mitigation to (1) improve their flood risk maps, (2) enhance flood risk awareness and, therefore, (3) create more disaster-resilient communities.

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, et al.

    Geodaten in der Strömungsmodellierung – eine hydrotechnische Bewertung der Ermittlung und Zuweisung von Rauigkeitsbeiwerten

    Angewandte Geoinformatik 2009, Heidelberg

    2009

    ISBN: 978-3879074808

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    S. Fuchs, Wolfgang Dorner, et al.

    Flood risk map perception through experimental graphic semiology

    Flood Risk Management

    2009

    Abstract anzeigen

    Flood risk map perception through experimental graphic semiology S. Fuchs Institute of Mountain Risk Engineering, University of Natural Resources and Applied Life Sciences, Vienna, Austria W. Dorner & K. Spachinger Department of Civil Engineering, University of Applied Sciences, Deggendorf, Germany J. Rochman & K. Serrhini UMR CNRS 6173, University of Tours, Tours, France The procedure of risk assessment emerged as an appropriate tool to analyse the impacts resulting from natural hazards. However, despite from a considerable amount of approaches and guidelines, only little work has been carried out with respect to the harmonisation of risk mapping, the information necessary, and the required quantification of possible impacts on decision-makers. A particular gap exists with respect to the perception of information provided in risk mapping for different stakeholder groups. Within the RISKCATCH project, risk maps were created for catchments located in the Alps and the related forelands. Based on the assessment of historical and possible future development of hazard, values at risk and vulnerability, these maps were created on different scales using scenario technique. The information cre- ated was evaluated by presenting the maps to several stakeholder groups, above all political decision makers, practitioners and laypersons from European countries, using the method of graphic semiology. As a result, pos- sible improvements in design and content of such information were deduced. The respective hydrological processes (precipitation, land use, geomorphology) and the rivers (structure, flood plain and flood defence) were analysed on a regional and temporal scale for three catchments in the Austrian Alps and two catchments in the German alpine foreland. Existing data of synthetic floods derived from hydrological models in combination with stream routing was linked with data of real flood and debris flow events to analyse the relations between precipitation and the development of hazards in the river system. Based on the modelling results of defined design events, the associated damage potential was assessed. Multi- temporal data on damage of previous inundations and data on the associated damage potential in the test sites was collected and edited for the use within a GIS-environment. The elements at risk—which were defined as those buildings within the test sites located in endangered area—were analysed with respect to their spatial location and extension using GIS. Intersecting this information, risk maps were generated on different scales in order to analyse possible improvements in information content and design. To quantify risk perception, the maps were presented to a group of stakeholders from different European countries. The method used was based on the approach of experimental graphic semiology, reversing the tradi- tional communication pattern from transmitter to receiver. Starting from receiver, the maps were presented to the test persons using an ophthalmic device for the record of eye movements during picture reading. The test was accompanied by a specific survey; hence, the cognitive perception of risk maps was evaluated. All maps were presented to the test persons for a relatively short time period to identify the most attractive components of each map. The eye movements were subsequently statistically analysed in order to assess patterns of visual perception for each map and to study the reading behaviour for text elements included in the maps. The visual strategies of each test person were quantified. The study resulted in guidelines of how to include information on natural hazard risk for different stakehold- ers, in particular with respect to visual information contained in risk maps. Thus, the results of the study can be used by administrative bodies for communication strategies within the concept of integral risk management, in particular with respect to non-structural flood mitigation. Keywords : Flood risk management, risk mapping, experimental graphic semiology, European research

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, et al.

    GIS-Unterstützung zur Umsetzung der Hochwasserrahmenrichtlinie – Überlegungen zur Datenhaltung und erste Versuche der Übertragung der Ergebnisse der Lärm- und Luftrichtlinie

    Angewandte Geoinformatik 2011, Berlin; Offenbach

    2009

    ISBN: 978-3879075089

    DigitalHochschulleitung und -einrichtungenInstitut für ExistenzgründungTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Thomas Bartscher, Wolfgang Dorner, Reinhard Höpfl

    Development of Rural Areas through Higher Education Institutions - The case of the University of Applied Sciences Deggendorf and regional development in the District Deggendorf

    Bologna Handbuch der European University Association

    2009

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    K. Spachinger, Wolfgang Dorner, et al.

    Flood Risk and Flood hazard maps – Visualisation of hydrological risks

    IOP Conference Series: Earth and Environmental Science

    2008

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, et al.

    Integration von Computermodellen im Hochwasserrisikomanagement

    Angewandte Geoinformatik 2011, Berlin; Offenbach

    2008

    ISBN: 978-3879075089

    Bauingenieurwesen und UmwelttechnikElektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    S. Fuchs, Rudolf Metzka, K. Spachinger, Wolfgang Dorner, et al.

    Development of flood risk in mountain catchments and related perception (RISKCATCH)

    CRUE Funding Initiative on Flood Risk Management Research

    2008

    Elektrotechnik und Medientechnik

    Vortrag

    S. Fuchs, K. Serrhini, Wolfgang Dorner, K. Spachinger

    Development of land use, related vulnerability and the interpretation of risk maps by different user groups

    INTERPRAEVENT, Dornbirn, Österreich

    2008

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    K. Serrhini, S. Fuchs, K. Spachinger, Wolfgang Dorner

    Evaluation of risk perception using experimental graphic semiology

    Geophysical Research Abstracts, vol. 10

    2008

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    K. Serrhini, J. Rochman, S. Fuchs, Wolfgang Dorner, K. Spachinger

    Sémiologie graphique expérimentale et cartographie du risque d’inondation

    Actes de l’Atelier "Systèmes d’Information et de Décision pour l’Environnement", Cemagref, Fontainebleau, Frankreich

    2008

    Elektrotechnik und Medientechnik

    Vortrag

    Wolfgang Dorner, et al.

    Integration von Computermodellen im Hochwasserrisikomanagement

    2008

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, et al.

    Integrated modelling and the impacts of water management on land use

    IOP Conference Series: Earth and Environmental Science

    2008

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, et al.

    Proving the ecosystem value through hydrological modelling

    IOP Conference Series: Earth and Environmental Science

    2008

    Bauingenieurwesen und UmwelttechnikElektrotechnik und Medientechnik

    Zeitschriftenartikel

    Wolfgang Dorner, M. Porter, Rudolf Metzka

    Are floods in part a form of land use externality?

    Natural Hazards and Earth System Sciences, vol. 8, no. 3, pp. 523-532

    2008

    DOI: 10.5194/nhess-8-523-2008

    Abstract anzeigen

    Peak and volume of river flows are functions of the catchment surface characteristics. This means that any impacts to the run-off regime (for example surface sealing and river training) could affect people and land users in the lower system. The costs of flood defence or compensation of damages are usually not included in the economic calculation of the upstream land owner or land user. In economic terms these effects are referred to as unidirectional externalities. This paper presents a methodology to identify externalities related to land use and run-off and describes the relevant cause-effect relations and how they can be modelled. The Herzogbach is a small tributary of the Danube River in Lower Bavaria. It is located in a rural area, dominated by intensive farming practices. A combination of hydrological and hydraulic modelling provided the core of the project methodology to allow the interpretation of economic data. Comparisons of damage estimates resulting from different hydrological scenarios based on different land uses, and flood mitigation costs were used to show the economic significance of human impacts.