TY - CHAP A1 - Chua, Lloyd H. C. A1 - Merting, Frank A1 - Holz, Klaus-Peter T1 - Numerical Simulation and Web-based GIS System for Flooding Processes T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - The accessibility to accurate, real-time information is vital in times of flooding. The availability of such information is important not only to mitigate the losses due to flood damage but more importantly, the saving of human lives as well. This paper presents the results of an engineering study on flood inundation, with the aim of providing (i) accurate information (for e.g. escape routes, flood arrival times etc.); and (ii) accessibility to this information via the internet. A case study was carried out for the Polder Mehrum area, which is situated along the River Rhine in Germany. The study investigates the inundation process resulting from a dyke breach. Inundation is first simulated using a two-dimensional hydrodynamic model, solving the shallow water equations using the finite element method.Next, the computed results from the hydrodynamic model and other essential information including infrastructure, land-use etc. are combined in a GIS-based digital terrain model, using a commercially available GIS software, ArcGIS.This information is then put on a web server and the data made available via the internet. We use the ArcIMS software for distributing the GIS data and applications over the internet. ArcIMS supports both HTML and Java client viewers which greatly enhances the performance of many operations. In addition, advantage can also be taken of new wireless technology, like hand held P.C.s, which would greatly increase the mobility of users while at the same time, maintaining the same level of access to information. It is envisaged that this methodology would allow the relevant authorities better real-time access to vital information which would aid in developing emergency and evacuation plans. On a local level, such information can also be used as an educational tool for citizens. This study forms part of a wider project investigating flood management in the polder areas along the Rhine. KW - flood Inundation KW - dyke breach KW - GIS KW - Internet Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Bazartseren, Bunchingiv A1 - Holz, Klaus-Peter T1 - Data Reduction for Coastal Morphological Study Using a Wavelet Transform T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - A possibility of compressing coastal morphological data by a wavelet transform was investigated. This was motivated by our intention to use Artificial Neural Networks (ANN) to simulate or predict the evolution of coastal morphology. ANN models for the above purpose should use the bathymetry measurements through a number of cross shore profiles for simulation or prediction, which consequently would cause the dimensionality dilemma in the input space. Therefore, a wavelet transform was chosen as an alternative method for a data compression.Wavelet analysis is a signal processing technique, which captures the time varying frequencies. A profile data is transformed into coefficients of high or low frequency components for different level of wavelet decomposition tree, from which the original profile can be restored back. The data reduction is realized, when the low frequency component coefficients after some level of wavelet decomposition would represent the profile. Thus, depending on the complexity of the profile shape and level of the decompositions, it is possible to reduce the data points of the profile several times.The reconstruction of the original data from up to the fourth level of approximation coefficients was reasonably accurate and at the same time the profile data was reduced to a permissible number as input to the ANN model for prediction. The reconstruction error will further be compared to those of Principal Component Analysis. The study has proven the wavelet transform to be a possible alternative of data reduction for the considered case. KW - wavelet transform KW - coastal morphology KW - data reduction Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Brüggemann, Bernhard Markus A1 - Liang, Shin-Jye T1 - Distributed Numerical Simulation utilizing Shared Information Bases T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - To support collaborative simulation processes on common hydro-science and -engineering projects in research and education, distributed numerical simulation environments are needed. For single task in collaborative working processes on water related engineering, a number of hydroinformatics tools have been developed. These hydroinformatics tools integrate geographical information systems (GIS), visualization, net communication, database management systems and numerical simulation software. Examples are tools usable for dynamic interactive WWW-documents, distributed and interactive visualization tools and the online linkage of WWW-applications to GIS-modules.Advanced numerical simulation environments serving completely distributed working processes demand a distributed www-based information management to allow the online information sharing. Therefore, the traditional principle of information exchange has to be extended by the principle of information sharing. Dedicated WWW-based tools for online editing input information of simulation software (such as topography editors, initial and boundary condition editors), online controlling simulation software and online visualization and documentation of simulation results are needed. Within a joint German-Taiwanese research project, a prototype of a distributed numerical simulation environment based on a common shared information base is developed and applied in water related engineering projects in research and education.In the contribution to the conference, the concept of distributed numerical simulation environments, focussing on the shared information base as core component, will be explained. Its application in 2D hydrodynamics will be shown on examples from river and coastal engineering. The societal impacts of the new information sharing paradigm compared to the traditional information exchange approach will be explained and demonstrated. KW - distributed numerical simulation KW - information sharing KW - collaborative engineering KW - WWW-Tools Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Hildebrandt, Gerald A1 - Holz, Klaus-Peter T1 - Shared Management and Processing of Heterogeneous Information Resources in Distributed Hydroengineering Projects T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - Modern hydroengineering projects demand for complete access to available information resources, which are often heterogeneous and distributed. KW - WWW-based KW - Information Management KW - collaborative engineering KW - Ontology Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Bethers, Uldis A1 - Holz, Klaus-Peter A1 - Berzins, V. A1 - Sennikovs, Juris T1 - Approach for Providing Input Data Series Required in Prognostic Simulations T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - The mathematical modelling of almost any natural process is highly sensitive with respect to the model input data. The issue of the input data series for the prognostic morphodynamic nearshore calculations is addressed in the paper. Non-linear morphodynamic response to the windwave-waterlevel forcing requires providing nearly-natural input data series for performing forecast simulations. Further, the quantifying of the severeness of the provided data sets is essential to distinguish typical and critical prognostic scenarios.A closed approach is proposed aiming to replace widespread praxis of using "representative" KW - mathematical modelling KW - prognostic simulations KW - wind-wave-waterlevel Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Schönefeldt, Karen A1 - Holz, Klaus-Peter T1 - Web Based Flood Information System for Urban Areas T2 - Advances in hydro-science and -engineering, volume V, proceedings of the 5th International Conference on Hydro-Science and -Engineering, Warsaw University of Technology, Faculty of Environmental Engineering, Warsaw, Poland, September 18 -20, 2002 N2 - For the management of disastrous flood events in rivers a variety of measures from warning to protection and eventually rescue has to be taken. Involved in these measures are experts from crisis management as well as members from supporting organisations, stakeholders and finally the citizens. All involved partners have to communicate to find proper decisions during the management of crisis situations. The process will be facilitated if education and training beforehand raise awareness to the risk potential in the area.Management of flood situations becomes, beside technical matters, a problem of information handling and dissemination. Conventional technologies are overcome. The emerging Information and Communication Technology (ICT) offers new potential and might even influence existing concepts at many sites.The paper deals with results from analysis of existing warning and crisis management systems at three sites. It aims at the design of an innovative solution utilising ICT as far as reasonable. The findings are integrated into a pilot software system adapted to the particular situation as given for the city of Frankfurt/Oder in the downstream part of the River Oder. The software solution is based on Internet accessible services for information distribution and collection, for warning risk prone citizens and for administrating rescue and protection services and materials. Flexibility is supported by utilisation of mobile communication technology. In the paper the software concept will be outlined, the covered features briefly described and the structure of information outlined. The software installed at Frankfurt/Oder will allow demonstration of the system within the Internet environment. KW - information management KW - communication support KW - ICT KW - flood management KW - Internet services Y1 - 2002 SN - 83-90617-77-3 CY - Warschau ER - TY - CHAP A1 - Bazartseren, Bunchingiv A1 - Holz, Klaus-Peter T1 - Improving the Performance of a Neural Network by Smoothening its Input Signal T2 - Hydroinformatics 2002, proceedings of the Fifth International Conference on Hydroinformatics, Vol. 1, Cardiff, UK, July 1st - 5th 2002 N2 - The article reports an attempt to obtain a better generalization of neural network model by smoothening its input signal. The considered case is a river runoff modelling at the outlet of a high-altitude lake. For the test location, the dominant peak of the annual hydrograph is induced by snow melt in the late spring. The summer rainfall has a less significance to the streamflow and the variability of daily runoff is very low, due to a regulating effect of the lake. The ANN model derived the daily average runoff quite accurately, with small inconsistencies in the output, using only a few input variables. To improve the model performance, the time series of air temperature was smoothened by a wavelet transform and Savitzky-Golay algorithm to compare with the normal procedure of moving window averaging. After using the smoothened data by different techniques, a noticeable improvement has been attained in the quality of the output of the individual ANN models, while the accuracy of the solutions were comparable. KW - neural networks KW - wavelet transform KW - Savitzky-Golay filter KW - runoff modelling Y1 - 2002 SN - 1-8433-9022-1 SP - 743 EP - 748 PB - IWA CY - London ER - TY - CHAP A1 - Bazartseren, Bunchingiv A1 - Hildebrandt, Gerald A1 - Holz, Klaus-Peter T1 - Hydroinformatic Web application and Web service for real-time water level presentation and short-term prediction T2 - Environmental communication in the information society, proceedings of the 16th International Conference Informatics for Environmental Protection, Vol. 2, September 25 - 27, 2002, University of Technology, Vienna, Austria N2 - Modern urbanization tends to cause a fast response time between a heavy precipitation and consequent runoff processes in a river basin. Therefore, it is even more essential nowadays to enable citizens to have a rapid and flexible access to information on the prevention or restoration measures in cases of flood, on the basis of the cutting edge advances of the Information and Communication Technology (ICT). The paper contains a description of a real-time Web application and service for water level observation, processing, presentation and a short term prediction of a river water level in the area of interest. The Artificial Neural Networks (ANN) are implemented for cost-effective water level prediction for a short horizon. On the whole, the Web applications and services should form a part of a publicly accessible Web based flood crisis management system. KW - Web application KW - Web service KW - real-time water level presentation KW - short-term prediction Y1 - 2002 SN - 3-9500036-7-3 SP - 604 EP - 610 PB - ISEP, International Society for Environmental Protection CY - Vienna ER - TY - CHAP A1 - Bazartseren, Bunchingiv T1 - Runoff Modelling at the Outlet of a High-Altitude Lake Using Neural Networks T2 - Junge Wissenschaftler forschen, 13. Forum Bauinformatik, München 2001 Y1 - 2001 SN - 3-18-316904-5 SP - 268 EP - 275 PB - VDI-Verlag CY - Düsseldorf ER - TY - CHAP A1 - Chua, Lloyd H. C. A1 - Merting, Frank A1 - Holz, Klaus-Peter ED - Falconer, R. A. T1 - River Innundation modelling for risk analysis T2 - River basin management, proceedings International Conference on River Basin Management, Cardiff, Wales, UK, September 2001 Y1 - 2001 SN - 1-85312-876-7 PB - WIT Press CY - Southampton [u.a.] ER - TY - CHAP A1 - Hildebrandt, Gerald A1 - Brüggemann, Bernhard Markus A1 - Holz, Klaus-Peter ED - Dillenbourg, Pierre T1 - Distributed Research and Education Platforms in Engineering - Experience from Hydroengineering Examples T2 - European perspectives on computer-supported collaborative learning, proceedings of the first European conference on computer-supported collaborative learning, March 22-24, 2001, Universiteit Maastricht, the Netherlands Y1 - 2001 SN - 90-5681-097-9 ER - TY - THES A1 - Alzoobi, Abed T1 - Objektorientierte Modellierung der Kosten in Hochbauprojekten KW - Objektorientierte Modellierung KW - Kosten KW - Hochbauprojekte Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-000000460 ER - TY - CHAP A1 - Molkenthin, Frank A1 - Holz, Klaus-Peter ED - Jun, Byong-Ho T1 - Generalised Information Systems for Physical State Variables in Hydroscience T2 - Water engineering for the future, Vol. 1., Abstracts of XXXI IAHR Congress, Coex, Seoul, September 11 - 16, 2005 Y1 - 2005 SN - 89-87898-25-3 SP - S. 107 PB - Korea Water Resources Association CY - Seoul ER - TY - CHAP A1 - Brüggemann, Bernhard Markus A1 - Holz, Klaus-Peter T1 - Quadtree based Hydroinformatics Simulation System - A Component-Oriented Finite Volume Toolkit Water Equations Y1 - 2004 ER - TY - CHAP ED - Schley, Frank ED - Weber, Lars T1 - Forum Bauinformatik 2005 - Junge Wissenschaftler forschen Y1 - 2005 SN - 3-934934-11-0 PB - BTU, Lehrstuhl Bauinformatik CY - Cottbus ER - TY - CHAP A1 - Bazartseren, Bunchingiv A1 - Holz, Klaus-Peter ED - Jun, Byong-Ho T1 - Short Term Prediction of Beach Morphology Using Artifical Neural Networks T2 - Water engineering for the future, Vol. 1., Abstracts of XXXI IAHR Congress, Coex, Seoul, September 11 - 16, 2005 Y1 - 2005 SN - 89-87898-25-3 SP - S. 112 PB - Korea Water Resources Association CY - Seoul ER - TY - GEN A1 - Holz, Klaus-Peter A1 - Chua, Lloyd H. C. T1 - Hybrid Neural Network - Finite Element River Flow Model T2 - Journal of Hydraulic Engineering Y1 - 2005 SN - 0733-9429 VL - 131 IS - 1 SP - 52 EP - 59 ER - TY - CHAP A1 - Schley, Frank A1 - Brüggemann, Bernhard Markus A1 - Holz, Klaus-Peter A1 - Rackwitz, F. A1 - Savidis, S. A. ED - Rivard, Hugues T1 - Multilevel Information Management between diverse Domain Models in Geotechnical Engineering T2 - Building on IT, XIth International Conference on Computing in Civil and Building Engineering, Joint International Conference on Computing and Decision Making in Civil and Building Engineering, Montreal, Canada, June 14 - 16, 2006 Y1 - 2006 SN - 2-921145-57-X SN - 2-921145-58-8 CY - Montreal ER - TY - CHAP A1 - Weber, Lars A1 - Holz, Klaus-Peter ED - Rivard, Hugues T1 - ANN Representation of FE for Groundwater Flow Simulation T2 - Building on IT, XIth International Conference on Computing in Civil and Building Engineering, Joint International Conference on Computing and Decision Making in Civil and Building Engineering, Montreal, Canada, June 14 - 16 Y1 - 2006 SN - 2-921145-57-X SN - 2-921145-58-8 SP - 106 CY - Montreal ER - TY - CHAP A1 - Holz, Klaus-Peter A1 - Schley, Frank A1 - Savidis, S. A. A1 - Rackwitz, F. A1 - Mejstrik, M. ED - Rüppel, Uwe T1 - Berücksichtigung von Ausnahmefällen bei der kooperativen Bearbeitung von Projekten des konstruktiven Tiefbaus T2 - Vernetzt-kooperative Planungsprozesse im Konstruktiven Ingenieurbau Y1 - 2007 SN - 978-3-540-68102-1 SP - 25 EP - 26 PB - Springer CY - Berlin [u.a.] ER -