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Category: forecast techniques

GloFAS-ERA5 reanalysis: River discharge ‘maps without gaps’ from 1979-present

GloFAS-ERA5 reanalysis: River discharge ‘maps without gaps’ from 1979-present

Contributed by Shaun Harrigan, ECMWF. In an ideal world we would have river discharge measurements for every river spanning many decades and updated in real time. We all know this is very far from reality with severe gaps in the global observing network (Lavers et al., 2019), and provides a fundamental challenge for hydrological monitoring and forecasting. A way forward pioneered in the field of meteorology and climate is to optimally combine available in situ and satellite Earth system observations…

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HEPEX Advances and Applications at MODSIM

HEPEX Advances and Applications at MODSIM

At the 23rd International Congress on Modelling and Simulation (MODSIM2019), from 1-6 December 2019 in Canberra, Australia, a HEPEX session highlighted recent work in hydrometeorological forecasting. Seline Ng from CSIRO discusses HEPEX highlights from MODSIM2019: We are glad to report that our session titled “Advances and applications in hydrometeorological forecasting” at the recent MODSIM2019 conference in Canberra, Australia went well, with a strong showing by the Australian Bureau of Meteorology (BOM), CSIRO Land & Water and University of Melbourne. Ours…

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HEPEX 2019 Year in Review

HEPEX 2019 Year in Review

In the last HEPEX blog post of the year, we’re taking a look back at our highlights of 2019! This year, we published 25 blog posts, with contributions from HEPEX-ers across the globe. But first of all, a quick reminder of important HEPEX events coming up soon: The abstract deadline for EGU 2019 (3-8 May, Vienna) is fast approaching – don’t forget to submit your abstract by 15th January! Click here for information on the Hydrological Forecasting sub-division over the past 10…

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Flash flooding is a serious threat in the UK – here’s how scientists are tackling its prediction

Flash flooding is a serious threat in the UK – here’s how scientists are tackling its prediction

Contributed by Christopher J White, University of Strathclyde ; Michael Cranston, RAB; Laura Kelly, University of Strathclyde ; Linda Speight, University of Reading. It’s becoming a familiar scene on the news: sodden British people wading through streets up to their knees in flood water. From Stirling to Sheffield, many parts of the UK in 2019 felt the impact of severe surface water flooding – often referred to as flash flooding – that followed torrential rain. As the climate changes and the…

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Lessons from calibrating a global flood forecasting system

Lessons from calibrating a global flood forecasting system

Contributed by Feyera Hirpa, University of Oxford. Hydrological models are key tools for predicting flood disasters several days ahead of their occurrence. However, their usability as a decision support tool depends on their skill in reproducing the observed streamflow. The forecast skill is subject to a cascade of uncertainties originating from errors in the models’ structure, parametrization, initial conditions and meteorological forcing. The Global Flood Awareness System (GloFAS) is an operational flood forecasting system that produces ensemble streamflow forecasts with…

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