Hidrológiai Közlöny 1998 (78. évfolyam)

3. szám - Zilahy András: Elárasztott területek felmérése multiszenzoros távérzékeléssel

156 HIDROLOGIAI KÖZLÖNY 1998. 78. É'v'F. 2. SZ. 7 Irodalom Biggin, D.S.; Blyth. K. (1996): A contparíson of ERS-1 salellile radar and aerial photograpliy for river flood mapping, Journal of Water andEnvironrueutal Management. 1996. vol. 10.no. l.p. 59 Boni. G.; Couti. M.. Dietrich. S.; Lanza. L.: Marzano. F.S.; Muguai, A.'. Panegrossi, G.: Siceardi. F. (1996): Multisensor obsenations during the flood evem of 4-6 November, 1994 over Northern Italy. Reniote Sensing Reviews. 1996. vol. 14. p. 91-117 Giacomelli. A.; Maucini. M.; Rosso. R. (1995): Assessment offlooded areas front ERS-1 PRI data: an application to the 1994 flood in Northern Italy. Phys. Chem. Earth. 1995. vol. 20.no. 5-6, p. 469-474 Imlioff, M.L.; McCandless. S.W. (1988): Flood boundary delineation through clouds and vegetarion iising L-band space-borne radar: a potential new tool for disea.se vector programs, Acta Astrouautica. 1988. vol. 17.no. 9. p. 1003-1007 Planet. W.G. (editor) (1988): Data extraction and calibration of TIROS-N/NO.U radiometers, NO.Í4 Technical Memorandum NESS 107-Rev. 1. U.S. Department of Couimerce. 1988 Rajau. M.S. (1991): Reniote sensing and geographical information system for nattiral resource management. Asian Developuient Bank. Manila (Phillippines). 1991 Rao. R.S. (1994): Role of reniote sensing in flood management - the May 1990 cyclone, International Journal of Reniote Sensing. 1994. vol. 15, no. 8.p. 1557-1558 Ulaby. F.T.: Moore. R.K.: Fang. A.K. (1988): Microwave reniote sensing, l 'olunie 1, Addison-Weslev Publ. Co.. Reading. Mass. USA. 1981 Wang. Y.: Koopmans. B. N.: Polli. C. (1995). The 1995 flood in tlie Netherlands nionitored from space - a multi-sensor approach. Interuational Journal of Reniote Sensing. 1995. vol. 16. no. 15. p 2735-2739 — (1991): SPOTuser's handbook. C.N.E.S. and SPOT Image. 1991 — (1992): ERS-1 system, European Space Agency, ESA SP-1146. 1992 — (1993): ERS-1 ttser handbook. European Space Agoicy. ESA SP1148. Revision 1. 1993 — (1993): Reniote sensing note. Japan Association ou Remote Sensing. OS. University ofTokyo. Japan. 1993 — (1994) : JERS-1 data users handbook. Earth Observation Center, NASDA. Japan. 1994 — (1995): 1MIHRSAT Muminated - Your guide to products and senices. RADARSAT Int.. 1995 Valamint különbűző dokiunoitiunok az Internetről. A kézirat beérkezeti: 199~. november 2Z ZILAHY ANDRÁS: okleveles villamosmérnök, doktorandusz a Budapesti Műszaki Egveteui Építőmérnöki Karán, a Vízgazdálodási Tanszéken. 1996-1998 közt a japán művelődésügyi minisztérium ösztöndijával a University oJ Tokyo, Faculty ofEngineering. Department of Civil Engineering, Institute of Industrial Science, Laboratoiy for Hydrologv and Water Resources Engineering hallgatója. Japánban.. Abstract: During üoods. the assessmejit of tlooded areas is otteu restricted by bad weather. by the interruption of telecommunicatiou aud/or ü ansportatiou systems. or by other luifavorable conditions. Tlie assessment of inundated areas is required quickly (a) to euable the planniug of emergencv relief and repairs to conimunications. trausportation and otlier services and (b) for the production of river Dood risk niaps. By their nature. most Uoods occiu- in bad \\ eather conditions. which can severely restrict tlie tusé of aircratt. and exteusi\'e cloud cover precludes tlie use of most eaitli observing sateüites. whidi rel v ou operating at optical waveleugth. The synthetic aperture radar (SAR) can peuetrate clouds and darkness. and therefore it is an ellieient tool for flood mapping. Hiis paper introduces the multisaisor approadi of remote sensing - the simultaneous aualysis of imagcs obtained by different sensors - in case of flood assessment. In most apphcations. the initial conditions are mapped with tlie use of a higli-resolution image taken by an optical seusor (Landsat. SPOT. etc ). and during the Üood eveut. the available images (from meteorological, optical or radar platfornis) are analyzed in a suitable computer software svstem. otteu combined with a geographical information svstem (GIS). Depending ou the methods used. diifereut classiűcatious with vary ing results can be prepared. Results of different aualysis show Üiat the inundated areas are usually underestűnated. mainlv because of insufficieut image-resolutiou. but proper cornparisous are diffieult to make. because groiuid truth measuremeuts are otteu missing. Another difficulty in the aualysis is the infrequeut overpasses of satelhtes o\ er the tlooded areas. With the advent of new satellites that can cover the Earth more frequeutly. and sensors designed directly to measure hydrological parameters. space technologv can be used for flood assessment and for monitoring other natural phenouiena more otten. more accurately and hopefiilly operatiouallv in more and more river basins. Keywords: flood monitoring, multisensor remote .sensing. synthetic aperture radar