Archive for the ‘Uncategorized’ Category

Projections of heavy rainfall over the central United States based on CMIP5 models

Several studies based on observational records found increasing trends over the central United States. Recently, Villarini et al. (2013) found a large increase in the number of rainfall days exceeding the 95th percentile of the rainfall distribution over the Upper Mississippi River Basin, and a much weaker signal in the Lower Mississippi River Basin. Villarini, G., […]

An Asynchronous Solver for Systems of ODEs Linked by a Directed Tree Structure

This paper documents our development and evaluation of a numerical solver for systems of sparsely linked ordinary differential equations in which the connectivity between equations is determined by a directed tree. Small, S.J., L.O. Jay, R. Mantilla, R. Curtu, L.K. Cunha, M. Fonley, and W.F. Krajewski. “An Asynchronous Solver for Systems of ODEs Linked by a Directed Tree Structure,” Advances in […]

Uncertainty in radar‐rainfall composite and its impact on hydrologic prediction for the eastern Iowa flood of 2008

This study addresses a significant potential source of error that exists in radar‐rainfall maps that are combined using data from multiple WSR‐88D radars of the Next Generation Radar (NEXRAD) national network in the United States. Seo, B.-C., L.K. Cunha, and W.F. Krajewski. “Uncertainty in Radar-Rainfall Composite and Its Impact on Hydrologic Prediction for the Eastern Iowa Flood […]

Flooding associated with predecessor rain events over the Midwest United States

This paper examines the severity and extent of flooding caused by six predecessor rain events (PREs) over the Midwest United States. PREs are areas of heavy rainfall that occur about 1000 km ahead of landfalling tropical cyclones. While recent studies have mostly focused on the synoptic conditions associated with PREs, little is known about the hydrologic […]

Atmospheric Rivers and Flooding over the Central United States

Based on the findings of this study, ARs are a major flood agent over the central United States. Lavers, D.A. and G. Villarini. “Atmospheric Rivers and Flooding over the Central United States,” Journal of Climate, 26, 12, pp. 7829–7836, 2013.

Hydro-NEXRAD-2: real-time access to customized radar-rainfall for hydrologic applications

This paper describes the challenges involved in HNX2’s development and implementation, which include real-time error-handling, time-synchronization of data from multiple asynchronous sources, generation of multiple-radar metadata products, and distribution of products to a user base with diverse needs and constraints. Krajewski, W.F., A. Kruger, S. Singh, B.-C. Seo, and J.A. Smith. “Hydro-NEXRAD-2: Real-Time Access to Customized Radar-Rainfall for […]

A Unified Flash Flood Database across the United States

This study is the first of its kind to assemble, reprocess, describe, and disseminate a georeferenced U.S. database providing a long-term, detailed characterization of flash flooding in terms of spatiotemporal behavior and specificity of impacts. Gourley, J., Y. Hong, Z. Flamig, A. Arthur, R. Clark, M. Calianno, I. Ruin, T. Ortel, M. Wieczorek, P.-E. Kirstetter, […]

Towards an Adaptive Flood Information System: Integrated Data Access, Analysis and Visualization

This paper provides an overview of the design and capabilities of the IFIS that was developed as a platform to provide one-stop access to flood-related information. Demir, I. and W.F. Krajewski. “Towards an Adaptive Flood Information System: Integrated Data Access, Analysis and Visualization,” Environmental Modeling & Software, 50, pp. 77–84, 2013.

Exploring the Effect of Reservoir Storage on Peak Discharge Frequency

In this paper, a simple hydrologic example is employed to illustrate the important features of reservoir regulated flood frequency. Ayalew, T. B., W.F. Krajewski, and R. Mantilla. “Exploring the Effect of Reservoir Storage on Peak Discharge Frequency,” Journal of Hydrologic Engineering, 18(12), pp. 1697–1708, 2013.

© Copyright - Iowa Flood Center