NEXRAD-ITR: Developing a framework for use of NEXRAD data in hydrology and hydrometeorology

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Wednesday, 1 February 2006
NEXRAD-ITR: Developing a framework for use of NEXRAD data in hydrology and hydrometeorology
Exhibit Hall A2 (Georgia World Congress Center)
Anton Kruger, The Univ. of Iowa, Iowa City, IA; and A. A. Bradley, W. F. Krajewski, R. E. Lawrence, J. A. Smith, M. L. Baeck, M. Steiner, M. K. Ramamurthy, J. Weber, S. A. Del Greco, F. M. V. Murthy, and D. Dhutia

We are developing and implementing a scientific workflow for producing surface rainfall maps suitable for research in hydrology and hydrometeorology that include the following steps: AP/clutter detection and removal, reflectivity-rainfall transformation, and georeferencing and transformation from polar coordinates to surface coordinates such as latitude/longitude, HRAP, and others. We are currently ingesting the full resolution (Archive Level II) data from 30 radars in real time via the UCAR/Unidata Internet Data Distribution. Core metadata are extracted and managed in a relational database as the data are ingested. The real-time data are augmented with selected data from NCDC's archive. We follow a watershed-centric approach so that user can request surface rainfall estimates for a watershed(s), which may require the mosaicing of estimates from several radars, but this is handled in a transparent manner by the system. Using a web browser users can select an output coordinate system, a watershed, time period, and desired temporal resolution. The system will then produce rainfall maps using predefined or user-selected algorithms in netCDF and other formats. A web services interface allows programmatic access to the system via scripts or compiled programs from remote servers. The completed system will be able to serve up watershed-centric maps rainfall maps that span multiple years. We will make the data and services available to the community via CUAHSI, NCDC, and Unidata.