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Category: decision making

Can we foresee drought and its impacts?

Can we foresee drought and its impacts?

Contributed by Samuel J. Sutanto and Henny A.J. Van Lanen; Hydrology and Quantitative Water Management Group, Wageningen University, the Netherlands. The 2018 and 2019 droughts are still fresh in our memory, when extended areas in Europe suffered, once more, from extreme drought. Climate projection studies show that drought very likely will become more frequent. Similar to the 2015 drought (Van Lanen et al., 2016), impacts of the 2018 drought in Europe were tremendous and affected many sectors. For example, farmers…

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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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Verification of U.S. National Hurricane Center’s forecast advisories, 2006-2019

Verification of U.S. National Hurricane Center’s forecast advisories, 2006-2019

Below is a re-post of a blog post that I recently published at forecastverification.com, which is a small company that I operate in part-time (in addition to my hydrometeorologist job at Deltares). While hurricane forecasting is a little removed from hydrometeorology, I figured that the disciplines have sufficient overlap for this to be interesting to the HEPEX community also. Happy reading! Introduction Post Hurricane Irma’s passage over Florida, back in September 2017, I analysed the quality of the forecasts that…

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Hydrometeorological forecast verification: the detail matters!

Hydrometeorological forecast verification: the detail matters!

Contributed by Seonaid Anderson, CEH.  Spending time and effort developing a novel hydrological ensemble prediction system, demonstrating its value, comparing with existing systems, justifying all that effort… there are many reasons why we verify our ensemble prediction systems. Before we dive into the number crunching, a few obvious questions need to be asked. What period to use for evaluation? This is often as long as possible, while maintaining relevance to the current application and subject to the usual computing constraints. What…

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Data Drought and Data Flood

Data Drought and Data Flood

Contributed by Mark Trigg*.  It’s hot, and very, very dry. The rains have failed, and the animals are dying. Around the table people are concerned that it will be people dying next. The cycle seems to repeat every 10 years and the response is exactly the same, every time – we must do something and save lives. “Drill more boreholes and put in big pumps and generators”, someone cries, “no matter the cost!”. A timid voice rises above the ongoing…

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