Author Archives: Andy Wood

Using ensemble forecasts to inform risk-based operations of a reservoir in Northern California

Contributed by:  Chris Delaney, Sonoma County Water Agency; John Mendoza, Sonoma County Water Agency; Brett Whitin, California Nevada River Forecast Center; Rob Hartman, Consultant Lake Mendocino is a reservoir located in Mendocino County, California, about 110 miles north of the … Continue reading

Posted in case-studies, decision making, ensemble techniques, operational systems, risk management, water management | 3 Comments

Hydrologic similarity: Bridging the gap between hyper-resolution and hydrologic ensemble prediction

Contributed by:  Nate Chaney (Princeton University) and Andy Newman (NCAR) The ever-increasing volume of global environmental data and the continual increase in computational power continue to drive a push towards fully distributed modeling of the hydrologic cycle at hyper-resolutions (10-100 … Continue reading

Posted in ensemble techniques, forecast techniques, hydrologic models | Leave a comment

Tracing The Origins of ESP

HEPEX Historical Hydrology Series, Edition 1 Contribution by Andy Wood, Tom Pagano, and Maury Roos, with special thanks to Mike Anderson Every day in the western US and elsewhere in the world, reservoir release decisions are made based in part … Continue reading

Posted in ensemble techniques, historical, seasonal prediction | 6 Comments

Streamflow flood monitoring and forecasting over Africa with little data

By Justin Sheffield (Princeton University) Recent flooding in Mozambique caused almost 100 deaths and displaced 150,000 people, with extensive damage to infrastructure. Forecasting such an event is a challenge because of the scarcity of on-the-ground data and lack of capacity … Continue reading

Posted in droughts, floods, forecast techniques, monitoring, operational systems | Leave a comment

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 … Continue reading

Posted in ensemble techniques, experiment, floods, forecast techniques, projects | Leave a comment

HEPEX site outage

Returning visitors may have found the HEPEX site apparently “down” in the last few days. While direct links to posts have been properly working all along, the portal’s front page showed an error message. As it turned out, one of … Continue reading

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The importance of parameterizations for better continental forecast systems

Contributed by Luis Samaniego (Helmholtz Centre for Environmental Research – UFZ) Parameterization: An old, ubiquitous, and recurring problem Modeling is a complex human activity because of the crucial trade-offs that have to be made to reach a final objective. According … Continue reading

Posted in hydrologic models | Leave a comment

Welcome to HEPEX 2015

Contributed by Andy Wood, Maria-Helena Ramos, Fredrik Wetterhall, Florian Pappenberger and Jan Verkade A new year starts for the HEPEX Portal. Last year, a list of New Year’s resolution was proposed and many of you (certainly!) followed our suggestions. 2014 … Continue reading

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HEPEX 2014 achievements

Contributed by Andy Wood, Maria-Helena Ramos, Fredrik Wetterhall, Florian Pappenberger, Jan Verkade and Nathalie Voisin 2014 is (almost) over… Did you miss something? It all started with four people having something to say…: our 2014 HEPEX columnists did a great … Continue reading

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Data Assimilation for Operational Hydrology and Water Management

Contributed by Prof. DJ Seo, University of Texas at Arlington (Texas) Data assimilation is alive and well in HEPEX!   The 3rd International Workshop on Data Assimilation for Operational Hydrology and Water Management of the Hydrologic Ensemble Prediction Experiment (HEPEX-DAFOH III) was … Continue reading

Posted in activities, data assimilation, meetings | Leave a comment