Browsed by
Category: data assimilation

When does a model value become an observation?

When does a model value become an observation?

Posted by @Hydrology_WSL (Massimiliano Zappa) on behalf also of @FPappenberger (Florian Pappenberger), @stagge_hydro (Jim Stagge) and @BteBrake (Bram te Brake). We acknowledge also tweets by @highlyanna (Anne Jefferson) and by @YoungHydrology. This blog post started out of the blue on October 30th 2015 after the twitter timeline of @Hydrology_WSL prompted a post by @highlyanne: She is unfortunately not the only researcher (modeler) confronted with interruption of key “observations” or “sudden changes” in the quality of the “observations” they are using….

Read More Read More

Interactions between data assimilation and post-processing

Interactions between data assimilation and post-processing

I have recently contributed to a paper where we investigate how statistical post-processing and data assimilation (also called real-time model updating in the engineering community) can be intrinsically related in the hydrological forecasting framework. The paper, co-written with François Bourgin (main author), Guillaume Thirel, and Vazken Andréassian, can be found here. We were basically guided by the following questions: How does data assimilation impact hydrological ensemble forecasts? How does post-processing impact hydrological ensemble forecasts? How does data assimilation interact with…

Read More Read More

Data Assimilation for Operational Hydrology and Water Management

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 held jointly with the 6th International Workshop on Catchment Hydrological Modeling and Data Assimilation (CAHMDA-VI) in Austin, Texas, USA, September 8-12, 2014. As a continuation of the past successful workshops of CAHMDA and HEPEX-DAFOH, the Austin workshop focused on assessing recent…

Read More Read More

Joint workshop on CAHMDA-VI and HEPEX-DAFOH III

Joint workshop on CAHMDA-VI and HEPEX-DAFOH III

Contributed by Albrecht Weerts The sixth international conference on CAtchment-based Hydrological Model Data Assimilation (CAHMDA-VI) will be held jointly with the third International Workshop on Data Assimilation For Operational Hydrology and water management of the Hydrologic Ensemble Prediction Experiment (HEPEX-DAFOH III) in Austin, Texas, USA, September 8-12, 2014. As a continuation of the past successful workshops of CAMADA and HEPEX-DAFOH, the Austin workshop focuses on assessing recent advances in observing, modeling, and data assimilation approaches with a goal to understand,…

Read More Read More

The Impact of using Ensemble Generator Produced Precipitation Estimates on the Calibration of a Hydrological Model

The Impact of using Ensemble Generator Produced Precipitation Estimates on the Calibration of a Hydrological Model

Contributed by Christopher J. Skinner The HEPEX Testbed Ensemble Representation of Rainfall Observation and Analysis Uncertainty was introduced in a previous blog post by Tim Bellerby. It aims to address some of the issues with representing uncertainty in precipitation observations by making use of ensemble simulation approaches and in the last few years I have been developing my research relevant to this Testbed, working with satellite rainfall estimates as one of Tim’s doctoral candidates. The doctoral research I undertook used…

Read More Read More