We need better topography data for better flood inundation simulation

We need better topography data for better flood inundation simulation

Contributed by Dai Yamazaki. In recent years, technical barriers for executing flood inundation simulation are getting lower and lower, thanks to increasing computational power and increasing availability of satellite observation data. Flood inundation models are now being used for flood risk assessment and monitoring, such as making a flood hazard map at any location in the world and forecasting flood hazard in a real-time manner. The physics equations used in flood inundation models are relatively simple, compared to those of…

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Drought Monitoring and Prediction in South Asia

Drought Monitoring and Prediction in South Asia

Contributed by:  Vimal Mishra* and Saran Aadhar, Civil Engineering, Indian Institute of Technology (IIT) Gandhinagar, India Drought is one of the most complex natural disasters. In South Asia — a region including India, Pakistan, Bangladesh, Sri Lanka, Nepal, and Bhutan — increasing population, dependence on agriculture, and frequent droughts have resulted in water scarcity and food scarcity. In India, for example, about 330 million people were affected by the 2014-15 droughts, which led to severe water shortages (Mishra et al., 2016)….

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Crowdsourced data for flood hydrology – Interview with flood chasers in France and Argentina

Crowdsourced data for flood hydrology – Interview with flood chasers in France and Argentina

Contributed by MH Ramos, member of the IRSTEA Columnist Team A recent paper published in the Journal of Hydrology has drawn my attention: Crowdsourced data for flood hydrology: Feedback from recent citizen science projects in Argentina, France and New Zealand. The paper deals with the use of information from social media in applied sciences and operations, with a focus on collecting photos and videos  to better assess river flows and to improve flood mapping after severe events. It prompts reflections on the way qualitative and quantitative data can…

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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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