Author Archives: Jan

Understanding forest snow interception

I am no expert in snow hydrology but I do recognize the importance of being able to estimate the amount of water captured in a snow pack and to be able to forecast snow melt rates. The University of Washington … Continue reading

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Muskingum routing: theory, example and a brief venture into linear algebra

For a project, I needed to re-familiarize myself with the concept of Muskingum routing. I looked up the theory, found a working example and coded the thing in R. As I suspected I could make the calculation more efficient by … Continue reading

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Warmte-Koudeopslag (WKO): energiebalans

Laatst vroeg een vriend of ik eens wilde kijken naar de energiebalans met betrekking tot de koude-warmte-opslag die hij voor zijn werkgever beheert. Het bedrijf moet periodiek rapporteren aan het (door de provincie ingehuurde) agentschap “Omgevingsdienst Haaglanden”. Het agentschap gebruikt … Continue reading

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“Predictive uncertainty” seminar – April 1, 2015, Faculty of TPM

The future is uncertain. Forecasting reduces this uncertainty but cannot eliminate it. Residual uncertainty remains. Risk management requires that these residual uncertainties are adequately characterised. Techniques for characterisation vary from probabilistic forecasting to scenario based forecasting, depending on the nature … Continue reading

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Proefschrift, verdediging en feest!

(For English, scroll down) Het Proefschrift Mijn proefschrift is hier te downloaden. De bijbehorende stellingen kun je hier downloaden. De Verdediging Op woensdag 1 april verdedig ik mijn proefschrift in de Senaatszaal van de Aula van de TU Delft. Om … Continue reading

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Our article on statistically post-processing ECMWF weather re-forecasts for use in operational streamflow forecasting

Recently, James Brown, Albrecht Weerts, Paolo Reggiani and myself published a research article on statistically post-processing ECMWF-EPS weather re-forecasts for use in streamflow forecasting. The article’s highlights can be summarized as follows: ECMWF ensemble reforecasts of precipitation and temperature were … Continue reading

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Webinar on ‘pre-processing’ in hydrologic forecasting

Wednesday, March 27th, I’ll be giving a webinar on pre-processing in hydrologic forecasting. The webinar is part of a new series of online presentations that are part of the HEPEX initiative. It is hosted by ECMWF and starts at 4pm … Continue reading

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