APPLICATION OF EO DATA IN FLOOD FORECASTING FOR THE CRISURI BASIN, ROMANIA

摘要

Considering the necessity to improve the means and methods to forecast, assess and monitor flooding, the paper presents the capabilities offered by remotely sensed data and GIS techniques. Although satellite sensors cannot measure the hydrological parameters directly, optical and microwave satellite data supplied by the new European and American orbital platforms like the EOS-AM "Terra" and EOS-PM "Aqua", DMSP, Quikscat, SPOT, ERS, RADARSAT, Landsat7 can supply information and adequate parameters to contribute to the improvements of hydrological modeling and warning.rnThe basic concepts of the creation of products useful for the forecast assess and monitor the flood events can be summarized in the following stages:rn1. preparation of the EO data: radiometric, geometric correction and other basic image processing;rn2. combination of the interpretation techniques: automated and photo-interpretation tools, as well as radiometric techniques;rn3. multi-sensor approach: make the analysis process easier and provide the opportunity to improve the quantity and quality of the information obtained;rn4. multi-temporal approach: gives the possibility to monitor low frequency (land modification) and high frequency phenomena (evolution of the floods boundaries);rn5. integrated approach: the high level products are based on the EO derived information combined with other ancillary data, hydrologic/hydraulic models outputs using the GIS facilities.