- KonferenzbeitragModelling the Hydrodynamics and Water Quality of the Vltava River Reservoir Cascade(Informatics for Environmental Protection - Networking Environmental Information, 2005) Růžička, Martin; Hejzlar, Josef; Jarošík, Jiří; Hřebíček, J.; Ráček, J.Mathematical modelling is an efficient tool for evaluation of impacts of human activities and environmental changes on water quality in rivers and reservoirs. This contribution describes simulations of water quality in the Vltava River reservoir system, namely cascade of reservoirs Hněvkovice, Orlík, Kamýk, Slapy, Štěchovice, and Vrané. The twodimensional water quality model CE-QUAL-W2 was used for this task over years 2000 to 2003. Sensitivity analysis, calibration, and evaluation of the model were done. The model gave good results in particular for hydrodynamics, water temperature, and conservative constituents because of good quality of available hydrological and meteorological input data. The accuracy of results was strongly depended on the quality of input data and sampling frequency. Minor problems occurred in water quality simulations based on monthly input data in periods with fluctuating discharges.
- KonferenzbeitragEuropean Energy System Models for the Analysis of Interdependencies Among Relevant Markets(Informatics for Environmental Protection - Networking Environmental Information, 2005) Perlwitz, Holger; Cail, Sylvain; Möst, Dominik; Rentz, Otto; Hřebíček, J.; Ráček, J.In the last decade, the European energy supply sector has faced far-reaching structural changes such as market liberalisation and stronger environmental laws that have led to new market structures and a new competitive environment. The ongoing discussion on emission reduction targets and climate change mitigation strategies threatens to cause new modifications for energy supply companies. This paper presents two PERSEUS-CERT3 model upgrades which focus on the interdependencies among decisive developments in the energy market, especially in the context of emission reduction strategies. These are, on the one hand, a more detailed representation of the European gas supply sector and, on the other hand, a sophisticated representation of demand side measures to increase energy efficiency.
- KonferenzbeitragNumerical Modelling and Analysis of Water Free Surface Flows∗(Informatics for Environmental Protection - Networking Environmental Information, 2005) Dabaghi, Fadi; El Kacimi, Abdellah; Kada Kloucha, Chakib; Mezali, Farouk; Nakhle, Bassam; Hřebíček, J.; Ráček, J.Various environmental engineering applications related to water resources involve unsteady free surface flows. A full 3D models based on Navier-Stokes equations are a good description of the physical features concerning several phenomena as for example lake eutrophication, transport of pollutant, flood in rivers, watershed, etc. However these models are characterized by an important computational effort, that we aim to reduce in some case by the help of 2D models or by appropriate coupling models of different dimensions and by the use of the parallel algorithmic trough HPCN facilities. In this work, we present an overview of some approximations methodologies and techniques for an efficient numerical modelling of water free surface problems in a finite element context.
- KonferenzbeitragThe Hydrological IT Framework of the Federal Waterways and Shipping Administration, Germany(Informatics for Environmental Protection - Networking Environmental Information, 2005) Michl, Christian; Steinmann, Frank; Reineke, Anja; Hřebíček, J.; Ráček, J.The Federal Waterways and Shipping Administration (WSV) in Germany provides as main tasks the safe and easy of inland and coastal shipping transport. To assure these main tasks information technology (IT) solutions and their operation are playing a major role. As central IT support and development section the Federal Waterway and Research Institute with their Information Technology Division are in charge for these developments. Beginning in the year 2000 the hydrological IT framework was redesigned to generate a structured data flow combining the elements of data acquisition, data processing and data distribution providing a standardised intranet solution and an e- Government application. The data acquisition using different telemetric systems as well as on- and offline components were standardised introducing a simultaneous online data transfer system which is connected to regional hydrological data storages. The regional hydrological data storages are grouped in three Citrix Metaframe terminal server farms split in seven server locations and providing the hydrological application software. For the data acquisition the WISKI workbench systems of the Kisters AG is used; existing of different modules for data validation, standardised reporting, stage and flow regulations, tidal and stream flow analysis. Using the Citrix Secure Gateway technology and web interface the internet access for the operation of the system is guaranteed and all components can be used from variable access. Server balancing and WISKI backup database servers provide a high working performance and security. The regional hydrological data storages provide the raw and analysed data to a central hydrological information system for the flood and storm tide warning service, e-Government applications, archiving of historical data and further distribution services.
- KonferenzbeitragApplication of GIS Analysis and CRES DSS for Optimal Design of Combustion Facility for Biomass(Informatics for Environmental Protection - Networking Environmental Information, 2005) Boukalová, Zuzana; Heller, Jakub; Kořán, Petr; Malamatenios, Charalambos; Petříková, Vlasta; Hřebíček, J.; Ráček, J.Design of facilities for conversion of biomass into heat or electrical energy requires detailed preparatory spatial analysis of the area concerned. Within a case study of 5th FP research project ENERGY FOREST (NNE5-2002- 00049) in Chomutov district (Czech Republic), a pilot application of integrated GIS analysis and CRES DSS decision support system (developed within another project) was performed to identify total amounts of available biomass and to design the combustion (steam turbine technology) facility in terms of its optimal placement and installed power. Suitable energy crops and expected yearly energy yields were calculated on the base of GIS analysis of the concerned territory using an integrated parameter of soil productivity for each cadaster of the district. Several alternatives of the conversion unit design were tested for various scenarios of biomass supplies and different locations of the facility. Economical parameters of each alternative were taken as crucial factors for selection of optimal facility design. Other factors like environmental protection, landuse, agricultural traditions and techniques, accessibility of terraine and others were taken into consideration for assessment of the amount of the biomass available, which was, in spatial form, an input parameter for testing of various alternatives.
- KonferenzbeitragAnalysis of Residential Heat Consumption and Building Data(Informatics for Environmental Protection - Networking Environmental Information, 2005) Krüger, Birgitta; Kleemann, Manfred; Hřebíček, J.; Ráček, J.
- KonferenzbeitragAir Quality Management Via the Forecasting Models(Informatics for Environmental Protection - Networking Environmental Information, 2005) Holnicki, Piotr; Kałuszko, Andrzej; Hřebíček, J.; Ráček, J.The paper addresses the possible applications of air pollution forecasting models for supporting decisions concerning regional strategy of emission abatement or the real-time emission control. The approach is based on the integration of a dynamic, air pollution forecasting model with the respective optimization techniques. The first problem (static optimization) consists in the optimal selection of emission reduction technologies within a given set of power plants. The second problem is formulated as on-line minimization of an environmental cost function, by the respective modification of emission level in the controlled sources, according to the changing meteorological conditions. The formulation of the gradient optimization algorithm is based on the necessary optimality conditions for the problem. The test computations have been performed for the above tasks, basing on the set of the major power plants in the industrial region of Upper Silesia (Poland).
- KonferenzbeitragDevelopment of an Agent-based Model to Analyse the Effect of Renewable Energy on Electricity Markets(Informatics for Environmental Protection - Networking Environmental Information, 2005) Genoese, Massimo; Sensfuß, Frank; Weidlich, Anke; Möst, Dominik; Rentz, Otto; Hřebíček, J.; Ráček, J.In this paper we present a bottom-up modelling approach of electric power and CO2-certificate markets including a detailed modelling of renewables using agent-based simulation: The PowerACE model. It has been developed at the Institute for Industrial Production, the Chair for Information Management and Systems (University of Karlsruhe) and the Fraunhofer Institute for Systems and Innovation Research. The market players of the German electricity market are modelled as independent entities. It is well suited to consider different strategies of market players and testing different market mechanisms.
- KonferenzbeitragOpenMI: A Standard Interface for Linking Environmental Models(Informatics for Environmental Protection - Networking Environmental Information, 2005) Gavardinas, Costas; Fotopoulos, Fotis; Gijsbers, Peter; Moore, Roger; Hřebíček, J.; Ráček, J.Modelling environmental process interactions has always been a challenge. Most attempts have resulted in domainspecific, case-tailored models representing the interaction of a small group of processes. From this work, it is now clear that there is little chance of building a single model or modelling system that will adequately represent the full range of processes. Α number of teams have developed frameworks, which have provided a more generic solution to the linking problem but still tend to be domain specific and lack the flexibility that is ideally required. HarmonIT, a European Union co-funded research project bringing together developers from all over Europe, has now developed a solution to the problem by designing and implementing a standard interface for linking mathematical models; it and the supporting software are called the Open Modelling Interface & Environment (the OpenMI). The paper describes the interface and explains the principles upon which it works. It also gives an overview of the environment that has been built to facilitate the linking and running of linked models.
- KonferenzbeitragUtilization of Mathematical Modeling for Self-purification of Tajan River and Its Impact on Caspian Sea (Mazandaran Province, North of I.R. Iran)(Informatics for Environmental Protection - Networking Environmental Information, 2005) Mehrdadi, Nasser; Bagvand, A.; Ghobady, M.; Hřebíček, J.; Ráček, J.The Caspian Sea is the largest (in surface area) land locked body of water in the world. The Caspian Sea is a rich source of natural resources and raw materials hosting a unique variety of living species and a developed natural examine system. The area of the Caspian Sea is 386400 km2. Five countries share the 7000 km coastline of the Caspian Sea. Water quality monitoring programs are undertaken to provide information to answer question relating to the management of water bodies and their catchments. They may be a single exercise to examine a particular issue or they may be on going monitoring programs to ensure that acceptable water quality is maintained. Self purification processes must be considered in the management of aquatic systems, particularly in the context of different standards, on water quality, which emphasizes the conservation or restoration of good ecological quality. Tajan River has a Shahid Rajaee Dam, which is located about 25 km south of Sari the Capital City of Mazandaran province. The minimum discharge regulated by the authorities of Dam in Tajan River as reported is 5 m3/sec. The effluent from Sari treatment plant after three years will be around 0.17 m3/sec. and after 20 years will be around 1.03 m3/sec. The dilution of treated wastewater in Tajan River after 23 years will be 1:5. This amount of Wastewater entering Tajan River will give an additional flow to the farmers to use for agricultural purposes or discharge to the Caspian Sea. Annual maximum and minimum rainfalls in Sari in ten (10) years from 1989 to 1999 are 1004 mm and 456 mm respectively. To design and implement monitoring programs for Tajan River water factors such as frequency of sampling, analytical methods site selection and criteria for water use area, was defined, accordingly. Monitoring station was selected as upstream of the River, Inside Sari City and downstream close to Caspian Sea (Delta). Samples were collected in 500-ml Sterilized bottles on a monthly basis for physical, chemical and microbiological analysis. Sampling and analyses were carried out in accordance with the Standard methods. The Results of water quality at different sampling location shows moderate range of 7.6 to 8.2 pH. Total dissolved Solids (TDS) were in the range of 350 mg/l to1100 mg/l hence at Delta up to 10800 mg/l. Maximum Value for BOD and COD were 18 mg/l and 53 mg/l maximum value of Nitrates is 2.6 mg/l the results show that the river quality is in moderate range. Based on collected data from different water quality monitoring stations, mathematical model used to assess the efficacy of self purification of Tajan River. The trend of results shows the river is in moderate condition.