Project Description

Project Context :

The improvement in quality and growing availability of satellite imagery represent a major advance for monitoring the ecological status of lakes (transparency, chlorophyll-a, suspended matter). These parameters, derived from water-color remote sensing algorithms, are produced continuously at the national scale (as part of the CNES SWOT downstream and France 2030 projects). For robust remote monitoring, a nationwide in-situ observation network dedicated to algorithm calibration and satellite product validation is essential.

Project Objectives :

The project first aims to establish an operational protocol for monitoring the optical properties of water (temperature and colour), based on reliable, standardised, low-cost instruments that can be easily deployed nationwide. It then seeks to design a monitoring network representative of the optical types of water bodies in France, in close collaboration with managers to ensure its feasibility and long-term sustainability. Finally, the project must implement a complete data-processing and management chain, including acquisition, quality control, data entry, storage, and visualisation.

Project Results

State of the art on the measurement of apparent optical properties of water: protocols and instrumentation. Definition of the protocol for the future national network of apparent optical properties (OPTILAC). Classification of water bodies in France according to their optical type using high-resolution satellite imagery. Quality assessment and dissemination of future OPTILAC network data.

To go further

Useful Links :

https://dataecla.fr/donnees/teledetection

Contact : thierry.tormos@ofb.gouv.fr