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GEOBIA using very high spatial and temporal resolution radar and optical imagery in tracking water level fluctuations in a freshwater reservoir

Abstract : Tracking water level fluctuations is important to the study and management of waterbodies. A geographic object-based image analysis using very high spatial and temporal radar interferometry (Cosmo-Skymed and TerraSAR-X) and optical (Pléiades) imagery is adopted in this study for this purpose. A linear regression model was sufficient to correlate the water surface area of a mildly sloping and unencumbered littoral zone spatial subset (extracted from 14 images) to water surface altitude data from the field. Results are excellent (R² = 0.963 and RMSE = 0.42 m for the unsupervised classification, with over 99% of land and water areas well-classified for radar images and 78.91% for optical images) albeit limited by the need for field data and the presence of a mildly sloping and unencumbered littoral zone. Potential solutions to overcome this limitation are briefly discussed.
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https://hal.inrae.fr/hal-02600902
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 5:36:49 AM
Last modification on : Friday, July 10, 2020 - 10:14:06 AM

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  • HAL Id : hal-02600902, version 1
  • IRSTEA : PUB00043281

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R.N. Simon, T. Tormos, P. A. Danis. GEOBIA using very high spatial and temporal resolution radar and optical imagery in tracking water level fluctuations in a freshwater reservoir. 5th Geographical Object based image analysis, May 2014, Thessaloniki, Greece. pp.4. ⟨hal-02600902⟩

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