Evaluation of EO data for rainfall-runoff processes in the Bela River catchment

摘要

The paper is based on the University's internal grant project (IGS2005/548/05) "Land classification on the bases of their spectral characteristics using earth observation data with higher resolution".The River Bela catchment is situated in the northwest part of Moravia (Czech Republic) -^sJeseniky Montains, close to the border with Poland (to the north), and flows into Nysa River (a tributary of Odra). It is 55.2 km long with a basin area of 395.9 km~2 (270.9 km~2 and 125.0 km~2) and discharges between 1.35 m~3/s in dry summer periods and more than 70 m~3/s in wet autumn or spring periods. Its upstream mountain basin ends close to the Czech-Polish border when the river reaches the plain area. The Bela/Biala River represents a typical torrential character river characterized by episodes of a high flood risk followed by periods of low precipitations and small discharges. The absolutely maximal discharge observed during the 1997 flood event reached 490 m3/s.The main aim of the project was to analyse LANDSAT ETM + data in comparison with CORINE LC 2000 nomenclature, to evaluate the suitability of ERS-2 (PRI) data as ancillary data with a different information basis than LANDSAT ETM + , and to promote decision support processes in the water management domain.We prepared a classificatory system acceptable for land cover evaluation in terms of rainfall-runoff characteristics. The classificatory system constitutes from CORINE nomenclatures and it was used for comparison with classified LANDSAT ETM +. For visual interpretation we interconnected LANDSAT and ERS-2.