Archive for the ‘Uncategorized’ Category

River network based characterization of errors in remotely sensed rainfall products in hydrological applications

The authors propose a hydrologic evaluation framework for gridded rainfall products. The framework will aid in the compilation of rainfall data and lower the chance for errors with satellite rainfall products in hydrologic applications.   ElSadaani, M., W.F. Krajewski, and D.L. Zimmerman, River network based characterization of errors in remotely sensed rainfall products in hydrological applications, Remote […]

Spatial variability and temporal persistence of event runoff coefficients over agricultural land

The analysis of unique rainfall-runoff data can offer more in-depth knowledge than the current internal spatial variability of small-scale runoff yield. Through the use of 12 unique hills, the authors intend to reduce the error of runoff data.   Chen, B., W.F. Krajewski, M. Helmers, and Z. Zhang, Spatial variability and temporal persistence of event […]

Inter-comparison of reflectivity measurements between GPM DPR and NEXRAD Radars

Reflectivity measurements are one example of a measurement that can be taken from GPM, DPR, and NEXRAD radars. This study demonstrates the potential use of the NASA’s Global Precipitation Measurement (GPM) Dual-frequency Precipitation Radar (DPR) to examine ground radar (GR) miscalibration and other uncertainty sources (e.g., partial beam blockage).   Keem, M., B.-C. Seo, W.F. Krajewski, […]

Iowa Flood Center 10th Anniversary Event

We’re sorry—due to high registration, we are no longer accepting RSVP’s for daytime activities. BUT you can still join us for the evening social event and flood panel discussion at Big Grove Brewery—no RSVP required! Flood experts will highlight accomplishments over the past ten years, as well as discuss innovative, forward-thinking ideas for how to move […]

Generalizing a nonlinear geophysical flood theory to medium‐sized river networks

The central hypothesis of a nonlinear geophysical flood theory postulates that, given space‐time rainfall intensity for a rainfall‐runoff event, solutions of coupled mass and momentum conservation differential equations governing runoff generation and transport in a self‐similar river network produce spatial scaling, or a power law, relation between peak discharge and drainage area in the limit […]

On the Frequency of Heavy Rainfall for the Upper Midwest of the United States

The results point to increasing trends in heavy rainfall over the northern part of the study domain. Examination of the surface temperature record suggests that these increasing trends occur over the area with the largest increasing trends in temperature and, consequently, with an increase in atmospheric water vapor. Villarini, G., J.A. Smith, M.L. Baeck, R. […]

Examining Regional Flood Frequency in the U.S. Midwest

The focus of this study is to evaluate: (1) “mixtures” of flood peak distributions, (2) upper tail and scaling properties of the flood peak distributions, and (3) presence of temporal nonstationarities in the flood peak records. Villarini, G., J.A. Smith, M.L. Baeck, and W.F. Krajewski. “Examining Regional Flood Frequency in the U.S. Midwest,” Journal of the American […]

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