Ilias Pechlivanidis

The HEPEX community contributing to EGU22 and IAHS22 – What not to miss!!!

May 9, 2022 Ilias Pechlivanidis Comments 0 Comment

It is finally happening! Soon the community will meet in Vienna and Montpellier and discuss the scientific and operational progress in hydrological forecasting. If you are planning to go and want to meet HEPEX and EC-HEPEX people, here are some tips on the sessions that might interest you. If unfortunately you cannot be there in person, do not worry since we are now in the era of hybrid events. You can simply register and attend the sessions online. Just browse…

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Shifting the focus of uncertainty analysis from parameters to functions

April 26, 2022 Ilias Pechlivanidis Comments 0 Comment

Contributed by Shervan Gharari and Hoshin V. Gupta To construct a working process-based model of an environmental system, modelers make a great many decisions. The model is fundamentally, therefore, an assemblage of hypotheses regarding how the natural system works. Those hypotheses can be categorized into 4 hierarchical levels: Level 1– System Diagram and Conservation Law Hypotheses: in which the boundaries of the system are defined, the ingoing and outgoing fluxes are specified, the fundamental system-level state/latent variables are identified (thereby…

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How can we verify the predictive performance of ensemble hydroclimatic forecasts?

February 17, 2022 Ilias Pechlivanidis Comments 0 Comment

Contributed by Zeqing Huang and Tongtiegang Zhao This blog aims to contribute to the large scientific discussion on the performance assessment of ensemble hydroclimatic forecasts. We are particularly driven by the valuable global precipitation and temperature forecasts generated by global climate models (GCMs) (Pappenberger and Buizza, 2009; Kirtman et al., 2014; Bauer et al., 2015; Becker et al., 2020; Crochemore et al., 2021). Their forecasts have been widely used in hydrological modeling and water resources management, including flood warning (Alfieri…

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“Hydrological Constellations”: a science & art piece

July 21, 2021 Ilias Pechlivanidis Comments 0 Comment

Contributed by Louise Arnal (artist & scientist; postdoctoral fellow at the University of Saskatchewan) From 29 June to 1 July 2021, the joint workshop “Connecting global to local hydrological modelling and forecasting: scientific advances and challenges”, co-organized by ECMWF – CEMS – C3S – HEPEX – GFP, was held virtually. As a scientist and artist, I wanted to participate and reflect on the topics explored during the workshop with both my scientist and artist hats on. With the support of…

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HEPEX @ MODSIM 2021

June 7, 2021 Ilias Pechlivanidis Comments 0 Comment

MODSIM is coming around again this year from 5-9 December and very excitingly you can now attend remotely or in person (!!!). So there are options for everyone! For those who aren’t aware, MODSIM is the biannual conference of the Modelling and Simulation Society of Australia and New Zealand, and attracts >700 delegates from all corners of the globe and all walks of modelling. The HEPEX sessions at MODSIM have a brief but eventful history: they began in 2015 and…

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