Characterisation of flood inundated areas and delineation of poor drainage soil using ERS-1 SAR imagery
✍ Scribed by MOUSSA BADJI; SYLVIA DAUTREBANDE
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 652 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0885-6087
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✦ Synopsis
Recent years have been marked by a continuous availability of spatial SAR data since the launch of the European remote sensing satellite (ERS-1) in 1991. Consequently, remote sensing techniques now oer an opportunity to map ¯ood inundation ®elds caused by river over¯ow or waterlogging in environments characterized by frequent cloud cover. Indeed, inundation ®elds can clearly be seen on ERS-1 SAR images taken during ¯ooding periods. However, such an identi®cation can be constrained by the similarity in behaviour between water surfaces and other features of the landscape such as extended asphalt areas, permanent water bodies and less illuminated slopes. For consistent ¯ood inundation extent mapping a more robust approach is required. This is provided by a conceptual ¯ood inundation index that is physically sound in relation to radar imaging. Moreover, this index has proved to be useful for highlighting soils located within inundation ®elds and having signi®cantly dierent internal drainage. The results achieved in the framework of the research must be seen in the context of intensive use of remote sensing data to support decision methods for sustainable management of land and water resources. Such decision support methods could be provided by river hydraulic models aimed at assessing environmental eects of inundation ¯oods and at early ¯ood warning systems.