For this month’s episode of HydroTalks, we’re thrilled to welcome Dr. Hossein Hashemi, an associate professor in the Division of Water Resources Engineering at Lund University in Sweden and a member of the Center for Advanced Middle Eastern Studies. His research focuses on groundwater and surface water management in arid and water-scarce regions, combining remote …[Read More]
If you want to run a hydrological model anywhere, the first question is which meteorological forcing to use. For the Po basin, or anywhere in northern Italy, there are today at least a dozen gridded products, regional and European, built from different meteorological networks, with different methods and for different purposes. I reviewed them from …[Read More]
A question with no single answer Imagine you are responsible for the water supply of a small town in the hills. Your wells tap groundwater, fed by rain and snowmelt seeping slowly through soil and rock. One day the town council asks a simple question: Will there still be enough water in August, fifty years …[Read More]
Dear EGU Hydrology community, Over the past few years, machine learning (ML) and artificial intelligence have fundamentally changed what is possible in large-scale hydrological modeling. At Google, our team has worked to develop machine learning river forecast models that operate globally, extending reliable forecasting to ungauged basins and covering almost two billion people through the …[Read More]
From 7-8 September 2026, the 1st International Training School on Urban Water Management and Nature-based Solutions for Sustainable Cities was held in Munich, Germany. Organised by researchers from the Technical University of Munich, the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, and the University of Cagliari in collaboration with the International Association …[Read More]
What flows around comes around For centuries, hydrologists have studied the flow of water through landscapes near and far. We measured flow rates, mapped aquifers and followed invisible paths of raindrops through soil and bedrock. Hydrology is a meticulous, beautiful science that has taught us much over the years. From the water cycle, surface water …[Read More]
At the time of preparing this blog entry, we are less than 48 hours after the catastrophe which has hit the Himalaya. While the flow of new information continues, it is useful to summarize and clarify the key points around this event. WHAT? The massive destruction was caused by a flash flood. It was such …[Read More]
Many of us are experiencing it right now: Europe is suffering from a long lasting large scale drought (Fig. 1), with record heat and low-flow levels that probably nobody of us has seen before; and current forecasts do not announce any relieve for the coming weeks. The pictures of record low levels in the river …[Read More]
Groundwater has always had an image problem. Throughout my career, I have lost count of how many times we have described groundwater as an “invisible resource” or similar. It is almost a cliché in hydrogeology. We use the phrase because it captures something really fundamental: groundwater is hidden physically, but it has also been hidden …[Read More]
Floods are shaped by complex and nonlinear interactions between weather patterns, rainfall, soil properties, topography, land cover, and how wet a catchment already is. This complexity is one reason machine learning (ML) is increasingly used in hydrology. ML models can learn patterns from large and complex datasets with many variables. Early in my PhD, while …[Read More]
