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TU Berlin

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Hyd³Flow: Coupling of Hydrological, Hydro-Numerical and Hydroinformatic Modeling Systems to Improve Flood Forecasting

Project head
Dipl.-Ing. C. Lange (Projektkoordinator), Prof. Dr.-Ing. R. Hinkelmann

Scientific assistant
Dipl.-Ing. Y. Om

Project period

01.06.09 - 31.05.11
Arbeitsgemeinschaft industrieller Forschungsvereinigungen „Otto von Guericke“ (AIF), Berlin
Project partner
Ingenieurgesellschaft Prof. Dr. Sieker mbH, Hoppegarten, smile consult GmbH, Hannover
Cooperation of Project Hyd³Flow

Motivation and Objective

The use of various modeling systems has grown steadily in recent years in water resources management, hydraulic engineering and environmental technology, both in academia and in engineering administration it has become an indispensable tool for planning, dimensioning and calculation tasks. This results from the interaction of the development of simulation techniques, probing and data processing methods and the rapidly growing computer or hardware performance, generally by falling prices.

A large current and future application of such modeling systems deals with the simulation of flood events and the consequential flood forecasting. The reasons for the application are the extreme flood events in the past recent years and the coming into force of the European Flood Directive in late 2007. Features of implementing this European Flood Directive are flood risk assessments to identify areas that are at potentially significant to flood risk, by 2011, flood hazard maps and flood risk maps, by 2013 and flood risk management plans by 2015 must be established, which will be an essential component of the modeling systems.

Since the mid-nineties, the nationwide legal boundaries of the flood waters first and second order are being calculated on the basis of model calculations and being revised. Investigations are usually carried out at federal level or district levels, which mean that the standards are different in the provinces. The protection against flooding within urban areas, for example, by backlog in the sewer is uniform ruled in the DIN EN 752 - but with much lower standards than in the surface waters. Then again, for flooding from drainage in exterior regions (e.g. sites below farmland) there are no standards. It is difficult to convey this distinction with regards to the cause of floods to concerned citizens. The way towards a unified approach in respect to the river basin level, as required by the European Water Framework Directive, is still far away, so that in the future there will be large processing requirements needed.

Working Schedule

For the first time in the applied project, hydrological, hydro-numerical and hydro-informatic modeling systems should be so interrelated that the above problems or deficits can be eliminated. No such product is currently available, neither on the national nor on the international market.

The basic idea is to first define an extended water main on which a two-dimensional hydro- numerical simulation is carried out. The territorial limits of the water network are determined from a simplified pre-calculation, (e.g. HQ300, HQ500) with an extreme event. The entire areas of the associated catchment in which the outflows are formed to be a hydrological rainfall-runoff model (possibly with the calculated approach to river and tributary streams) are connected directly with the water and the sewerage system. The connection of the modeling system will controlled and analyzed by means of a newly developed common practice-oriented user interface.

Photo Toolbar of the coupled modeling of hydrology and hydro-numeric

Work Package: Prof. Dr. Sieker

  • Developing and defining of the requirements for the pre-and post-processing to combine the modeling systems
  • NA-modeling using selected test areas
  • Hydro-numerical modeling of the sewer system
  • Coupling calculations
  • Check the results for plausibility, verification, working out of the competitive advantages
model of a network

Work Package: FG Wasserwirtschaft und Hydrosystemmodellierung

  • Developing and defining of the requirements for the pre-and post-processing to combine the modeling systems
  • Extensive hydro-numerical modeling
  • Coupling calculations (hydrology/hydro-numerics)
  • Check the results for plausibility, verification
Results of hydro-numeric modeling

Work Package: Smile Consult GmbH, Hannover

  • Development of pre- and post-processing (interfaces for data input and output, creating and setting of initial and boundary conditions for model validation, modeling systems used for linking and intuitive user experience)
  • Site modeling
  • Development of software-technical model linkages (interfaces)
  • Coupling calculations
  • Check the results for plausibility, verification, working out of the competitive advantages
Site modeling at Postprocessing

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