RADARSAT Imaging of the 1997 Czech Republic Flood

  1. N. D. Smith7 and
  2. J. Rogers8
  1. L. Halounová1,
  2. R. Dixon2,
  3. H. Pokrant2,
  4. D. Strnad3,
  5. R. van Wyngaarden4,
  6. V. Koláø5 and
  7. I. Cícha6

Published Online: 17 MAR 2009

DOI: 10.1002/9781444304213.ch6

Fluvial Sedimentology VI

Fluvial Sedimentology VI

How to Cite

Halounová, L., Dixon, R., Pokrant, H., Strnad, D., van Wyngaarden, R., Koláø, V. and Cícha, I. (1999) RADARSAT Imaging of the 1997 Czech Republic Flood, in Fluvial Sedimentology VI (eds N. D. Smith and J. Rogers), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304213.ch6

Editor Information

  1. 7

    Department of Geosciences, 214 Bessey Hall, University of Nebraska, Lincoln, NE 68588-0340, USA

  2. 8

    Cape Town, South Africa

Author Information

  1. 1

    Faculty of Civil Engineering, CTU Prague, Thákurova 7, Prague 6, Czech Republic

  2. 2

    Natural Resources, Remote Sensing Centre, Manitoba, Canada

  3. 3

    MGE DATA, Vrchlického 60, Prague, Czech Republic

  4. 4

    Geomatics International, Burlington, Ontario, Canada

  5. 5

    Water Research Institute of T.G. Masaryk, Prague, Czech Republic

  6. 6

    Czech Geological Survey, Prague, Czech Republic

Publication History

  1. Published Online: 17 MAR 2009
  2. Published Print: 7 OCT 1999

ISBN Information

Print ISBN: 9780632053544

Online ISBN: 9781444304213

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Keywords:

  • RADARSAT imaging of 1997 Czech Republic flood;
  • area of flood;
  • image processing and interpretation;
  • colour composite (RGB) of three images distinguishing permanent and flood water immediately;
  • RADARSAT imagery

Summary

Very intensive rainfall at the beginning of July 1997 caused extensive flooding in the eastern part of the Czech Republic. On Friday, 4 July, a low-pressure system, which originated in northern Italy, tracked northeast to the Moravia region of the Czech Republic. This system brought extreme rainfall as it moved to the southeast of Poland and Silesia on the morning of 6 July. Over a 5-day period the total rainfall for one-third of Moravia (10 000 km2) was 500 mm. The average rainfall for the Czech Republic is 600 mm yr. This event caused 100–400-yr discharges in regional streams. On Tuesday, 8 July, the first RADARSAT image was ordered and the satellite imaged the northern part of Moravia on 10 July. An additional four images were ordered to archive intermediate stages of the flood. Areas of flooding were determined on all images. Delineation of flooded areas in post-flood images was possible owing to high radar sensitivity to the high soil-moisture contents. Changes in soil moisture, detectable over thousands of square kilometres, can also serve in studies of soil permeability or hydrogeological conditions, if imaged at successive time intervals.