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Category: experiment

Assimilation of in-situ and satellite data in hydrological predictions – Can we add value?

Assimilation of in-situ and satellite data in hydrological predictions – Can we add value?

Contributed by Jude Musuuza (SMHI). The increased focus on satellite missions in recent years has resulted in a rich source of valuable Earth Observations (EO), in terms of spatial coverage and temporal frequencies that are impossible to achieve with direct measurements. Such observations have been used in various disciplines, including also hydrological modelling, for instance to improve process understanding through tailored model parameterisation and performance assessment. In addition EOs have been used to (better) initialise the model states which further…

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Forecasting algal blooms in lakes and reservoirs

Forecasting algal blooms in lakes and reservoirs

Contributed by: Trevor Page, Paul Smith, Keith Beven, Ian Jones, J Alex Elliott, Stephen C Maberly, Eleanor B Mackay, Mitzi De Ville and Heidrun Feuchtmayr Why is it needed? Forecasting algal blooms is an increasingly high priority for water managers to aid in reactive decision-making and to avoid dangerous and expensive bloom impacts. Algal blooms are a global problem affecting water resources, recreation and ecosystems. Toxic algal species such as cyanobacteria (more commonly known as blue-green algae) can kill pets…

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Fictitious Forcings have Macondo in Trouble: A Hackathon Story

Fictitious Forcings have Macondo in Trouble: A Hackathon Story

Contributed by Georgy Ayzel.  Meteorological ensemble forecasts form the core of every system for hydrological ensemble prediction. There are multiple data sources where our meteorological ensembles could come from: historical observations, numerical weather prediction and climate models, or stochastic weather generators. Different sources serve different ways we want to communicate and deliver the information of possible runoff responses to various meteorological conditions. However, there is a source that is typically ignored in the modern landscape of ensemble runoff prediction –…

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Real-time forecasts for your holidays in Switzerland. Keep tuned and give feedback!

Real-time forecasts for your holidays in Switzerland. Keep tuned and give feedback!

In Switzerland the 1st of June represents the unofficial start of the flash-flood season. Against this, in 2013 we selected June 1st to launch our www.drought.ch platform on early recognition of critical droughts (see this post here). At that moment, a flood situation was going on in large parts of Switzerland (see our archived forecast here), and so less attention was given to that new product of us. This year I was planning to write sometimes here a blog post…

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“The Böögg Bang Theory” – or: Traditional seasonal forecasts in Switzerland

“The Böögg Bang Theory” – or: Traditional seasonal forecasts in Switzerland

by Massimiliano Zappa, a HEPEX 2015 Guest Columnist Dear readers, when last year the Paris-based HEPEX co-chair (the one with two first names) contacted me to ask whether I could have interest in writing a couple of columns for the HEPEX site I really underestimated how much fun this could be. I never thought in my life that I would be able to combine our Kings-Cake tradition on January 6th with my daily business (see my first post here). Also…

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