Sub-system based on hydrological modeling and GIS technology for flood management NATO SfP project 987016

1. Sub-system based on hydrological modeling and GIS technology for flood management (NATO SfP project 987016) Valentina UNGUREANU1, Gheorghe STANCALIE2, Viorel Alexandru STANESCU1, Ciprian CORBUS1 1 National Institute of Hydrology and Water Management, Bucharest, Romania 2 National Institute of Meteorology and Hydrology, Bucharest, Romania

2. MONITORING OF EXTREME FLOOD EVENTS IN ROMANIA AND HUNGARY USING EO DATA ROMANIA

3. Study area: the transboundary basins of CRISUL ALB and CRISUL NEGRU Rivers

4. The sub-system for flood management in the Romanian � Hungarian transboundary area - Components - Images database - Images from meteorological satellites and EO data GIS database - A relational structure of different thematic info-layers Hydrological forecast model - VIDRA model

5. The sub-system for flood management in the study area- Utility - Normal periods: Evaluation and cartography of the flood hazard zones; Calculate certain hydrographic basin features necessary to determine initial parameters of the hydrological model; Validation of hydrological modeling-based flood risk assessment using the inventory of the flooding events already observed by the earth observation facilities. In case of a meteorological warning: Evaluation of the soil moisture and snow cover; Assessment of the flood impact, location of the potentials zones affected by flooding and for the potential damage evaluation (combined with the forecasted hydrographs). Post-crisis: Analysis and damage assessment; Determination of the size of the flood-prone area.

6. GIS database in the Crisul Alb and Crisul Negru Basins

7. Hydrological model VIDRA Snow melting model (degree-day method); Effective rain calculation model (deterministic reservoir model � interception, depression, unsaturated zone and saturated zone reservoirs); Transfer model (Unit hydrograph); Routing model (Muskingum transfer function); Attenuation model of the runoff through: reservoirs, lateral polders and derivation channels (Puls method); Forecasting updating (CORA procedure).

8. Updating CORA procedure

9. Input data meteorological variables, hydrological variables, characteristics of the river basin, characteristics of the hydrographic network and the characteristics of the hydraulic structures that influence the runoff. Hydrological model VIDRA

10. VIDRA softwer The softwer chain version 1.0 on PC will include 10 programs: a managing interface for the program assembly, two main programs: HIDRA � computed hydrographs and COMPUNEREA � wawes mitigation 8 programs for the creation and updating of the input data files (4 for model parameters and 4 for variable input data � precipitation, discharges, HU type etc).

11. A central platform and information server will be installed in the NIMH, Bucharest for information and data distribution. The data storage via distributed databases will facilitate a fast and sustainable access to the information required for flood monitoring and for the generation of statistically significant large data records. The use of the forecasted hydrograph will permit the assessment of the flood impact, the location of the potentials zones affected by flooding and the evaluation of potential damages. The final products will be maps easily to understand by the end-users. The proposed structure guarantees effective data management and exchange facilities. The internet gateway will also makes possible the rapid distribution and collection of information. We intend to standardize products and to distribute the results of the project via the central network internet interface. The sub-system for flood management in the Romanian � Hungarian transboundary area

12. The impact of the expected results with respect to the situation in ROMANIA