hydrology

As sea levels rise and freshwater scarcity intensifies, the salinity wedge—the subtle intrusion of seawater into freshwater systems—has become a silent threat to global water security. Monitoring its movement helps protect drinking water sources, safeguard agriculture, and guide resilient coastal water management strategies in a changing climate.

Space altimetry has opened a new era for scientific understanding of Earth’s water cycle, providing high-resolution, global monitoring of rivers, lakes, and wetlands—especially with recent breakthroughs from missions like SWOT and CryoSat. This article explores the game-changing impact of spaceborne measurements on continental freshwater research and hydrological modeling.

On 18 September, our Toulouse office at B612 – Innovation Center welcomed a special team-building session – a moment to pause, reconnect, and grow together beyond our daily projects.

Flood early warning systems have a long and impactful history, evolving from simple local measures to sophisticated global networks. Famous success stories in Bangladesh, Uganda, and the Hindu Kush Himalayas show how community action and technology work together to protect lives. The central lesson: empowering people with timely alerts turns disaster response from devastation to resilience, with practical benefits for vulnerable populations worldwide.

South Asia faces a hydrological crisis of unprecedented scale—one that is reshaping lives, economies, and geopolitics throughout the region. In 2025, catastrophic floods uprooted millions in Pakistan and India, while drought and water shortages deepened hardship in Bangladesh and Sri Lanka. These mounting challenges are fueled by Himalayan glacier melt, unpredictable monsoons, and outdated water-sharing agreements. As surface water dwindles, groundwater is being over-extracted—yet urban and rural communities alike continue to struggle in the search for safe, reliable supplies. Blue Water Intelligence explores how South Asian nations are adapting to the new water reality, and why collaborative solutions have never been more critical for the region’s future.

Discover how the Normalized Nash-Sutcliffe Efficiency (NNSE) is chosen by the scientific community to evaluate hydrological models. NNSE offers a clear, bounded, and more interpretable metric than traditional NSE, enabling accurate benchmarking of water models to support reliable water intelligence and decision-making.

Surface water speed in rivers is a dynamic parameter vital for environmental stewardship and flood safety. Advances in measurement technologies, including LSPIV and ADCP, allow for high-precision, real-time monitoring—enabling better-informed decisions for conservation, engineering, and risk management.

Blue Water Intelligence (BWI) plays a vital role in global climate monitoring by providing high-frequency, remote-sensing-based data on key hydrological Essential Climate Variables (ECVs) such as river discharge, water levels, and soil moisture. In regions where ground observations are sparse, BWI delivers reliable, scalable insights to support climate adaptation, water resource management, and SDG reporting. Learn how BWI helps bridge the data gap for climate-resilient decision-making.

BWI wins the CNES call for projects under the France 2030 plan to develop an innovative global hydrological monitoring service using satellites and artificial intelligence.