LIST OF CONTENTS/SOMMAIRE 1 Introduction ............................................................................................................................................... 7 2 Available ancillary data ............................................................................................................................ 7 3 Calibration – Validation periods ............................................................................................................ 10 4 Derive discharge from altimeters (RD-alti) ............................................................................................
12 4.1 Context ........................................................................................................................................... 12 4.2 Bayesian-based Rating Curve (RC) estimation ............................................................................ 13 4.2.1 Bayesian approach ................................................................................................................... 13 4.2.2 WSE data type ........................................................................................................................... 15 4.2.3 Method 1 – Bayesian estimation using overlapping dataset – preferred approach ...........
16 4.2.4 Method 2 – Bayesian estimation using quantile-based matching – alternative approach . 18 4.3 Uncertainties ................................................................................................................................. 19 5 Derive discharge from river-width (RD-width) ....................................................................................... 20 5.1 River width estimation using optical satellite imagery ............................................................... 20 5.2 River discharge estimation using river width ..............................................................................
21 6 Derive discharge from multispectral images (RD-multispec) .............................................................. 23 6.1 Context ........................................................................................................................................... 23 6.2 Reflectance indices definition ...................................................................................................... 23 6.3 Multi-mission reflectance time series .......................................................................................... 24 6.4 River discharge estimation from reflectance indices .................................................................
27 6.4.1 Calibrated Approach ................................................................................................................. 27 6.4.2 Uncalibrated Approach ............................................................................................................. 28 7 Derive discharge from merged products............................................................................................... 29 8 References .............................................................................................................................................. 29 D.3 River Discharge ATBD. Reference: RD_CCI-0006-ATBD - Issue 2.0 – 31/07/2025 Open/Public © 2019 CLS.
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