We acknowledge and appreciate useful discussions with Dr. James A. Smith, from Princeton University, and Dr. Dong-Jun Seo, from the Office of Hydrology of the National Weather Service. We also thank Tim O’Bannon, Operational Support Facility of the National Weather Service, and two anonymous reviewers for their helpful comments on the original manuscript. This study was supported by the National Weather Service under a Cooperative Agreement between the Office of Hydrology and the Iowa Institute of Hydraulic Research and by the National Aeronautics and Space Administration under Grant NAG-5-2094.
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