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Category: experiment

Ensemble Hydrological Forecasting in China: Status and Prospects

Ensemble Hydrological Forecasting in China: Status and Prospects

Contributed by Qingyun Duan, Beijing Normal University, China The hydrometeorological services of the western countries, including the United States, Canada, Australia and many European countries, have already fully adopted ensemble forecasting methods operationally in their meteorological forecasts, and development and implementation of ensembles in their hydrological forecasts is well underway. Asian countries, particularly China, have been slow in taking on ensemble forecasting approach in their operational hydrological forecasts. As we enter the Year of the Sheep, I take this opportunity…

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How much can we expect from forecasting systems in the future? European floods of 2013 – revisited

How much can we expect from forecasting systems in the future? European floods of 2013 – revisited

Contributed by Fredrik Wetterhall In early June 2013, the Northern part of the Alps where hit with extreme rainfall that led to extensive flooding in Central Europe, with a death toll of 25 people and overall economic losses of €12bn. A classical synoptic weather pattern with a deep quasi-stationary low pressure system brought moist air towards the Northern side of the Alps. Orographic lifting led to very intense  precipitation over a large area where the soils were already saturated due…

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www.drought.ch – Early recognition of critical droughts in Switzerland

www.drought.ch – Early recognition of critical droughts in Switzerland

In recent years Switzerland experienced some unprecedented drought situations. At the political level solutions have been requested for early recognition of hydrological droughts. A prototype information platform has been developed to guide water resources management during situation where water resources drop below critical levels. www.drought.ch has been developed after a two-stage dialog with stakeholders from different sectors including hydropower, forestry, agriculture and river navigation. Since June 2013 the platform is presenting daily updates information on anomalies in precipitation, streamflow, lake…

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Testbeds in HEPEX: lessons learned and way forward

Testbeds in HEPEX: lessons learned and way forward

Contributed by Maria-Helena Ramos and Andy Wood How were testbeds initially defined? The testbed activity was first summarized in the 2006 Implementation Plan for The Hydrological Ensemble Prediction Experiment (HEPEX) (Wood et al., 2006). In the first two HEPEX workshops (Reading in 2004 and Boulder in 2005), it was decided that HEPEX’s projects and activities would be organized in pilot ‘testbeds’ (download here the proposal from the Boulder 2005 workshop). “The test beds are collections of data and models for specific…

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Intercomparison of streamflow post-processors Post-Processing hydrologic model simulations (Phase 1)

Intercomparison of streamflow post-processors Post-Processing hydrologic model simulations (Phase 1)

Contributed by James Brown, Nathalie Voisin and Maria-Helena Ramos The experiment was launched in June 2012 and the first results are currently being anlaysed. See our poster presented at EGU 2013: Posters HS4.3/AS4.20/NH1.13 – Ensemble hydro-meteorological forecasting for improved risk management: across scales and applications Our aims is: To establish the advantages and disadvantages of different post-processing techniques and strategies when accounting for hydrologic uncertainty To foster ongoing collaboration among the HEPEX participants on the topic of streamflow post-processing and…

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