Synergistic Approach of Remote Sensing and GIS Techniques for Flash-Flood Monitoring and Damage Assessment in Thessaly Plain Area, Greece

Water

Emmanouil Psomiadis¹  Melpomeni Zoka¹  KonstantinosX. Soulis¹  Nicholas Dercas¹ 

[1] Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, 75 Iera Odos st., Athens 11855, Greece;

关键词: Landsat 7;    Sentinel-2;    Sentinel-1;    GIS modeling;    DEM;    water indices;    flash-flood mapping;    damage evaluation;   

DOI  :  10.3390/w11030448

来源: DOAJ

【 摘 要 】

This paper describes the synergetic use of earth observation satellites optical and radar data with a high-resolution digital elevation model (DEM) to detect flooded areas and explore the impacts of a flood event. A flash flood episode took place in May 2016, in the central-eastern part of West Thessaly (Central Greece). Landsat-7 ETM+ and a Sentinel-1 SAR images were acquired. For Landsat-7, several water indices were applied and for the Sentinel-1 a threshold method was implemented. Elevation data were also used to improve the delineation of the inundated areas, and to estimate flood water depth. Furthermore, Sentinel-2 images were utilized so as to record the land use/cover of the flooded area. The inundated areas and the affected cultivations were delineated with high precision, and the financial effects were evaluated.

【 授权许可】

Unknown