The Regional Hydrologic Extremes Assessment System: A software framework for hydrologic modeling and data assimilation

Andreadis, Konstantinos; Das, Narendra N.; Stampoulis, Dimitrios; Ines, Amor Valeriano M.; Fisher, Joshua B.; Granger, Stephanie; Kawata, Jessie; Han, Eun Jin; Behrangi, Ali

The Regional Hydrologic Extremes Assessment System (RHEAS) is a prototype software framework for hydrologic modeling and data assimilation that automates the deployment of water resources nowcasting and forecasting applications. A spatially-enabled database is a key component of the software that can ingest a suite of satellite and model datasets while facilitating the interfacing with Geographic Information System (GIS) applications. The datasets ingested are obtained from numerous space-borne sensors and represent multiple components of the water cycle. The object-oriented design of the software allows for modularity and extensibility, showcased here with the coupling of the core hydrologic model with a crop growth model. RHEAS can exploit multi-threading to scale with increasing number of processors, while the database allows delivery of data products and associated uncertainty through a variety of GIS platforms. A set of three example implementations of RHEAS in the United States and Kenya are described to demonstrate the different features of the system in real-world applications.


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International Research Institute for Climate and Society
Published Here
July 16, 2017