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United States Department of Agriculture

Agricultural Research Service

Research Project: Quantifying Changes of Within-Storm Intensity Variations Due to Climate Change

Location: Watershed Physical Processes Research Unit

Project Number: 6408-13000-023-39
Project Type: Nonfunded Cooperative Agreement

Start Date: Apr 01, 2013
End Date: Sep 20, 2013

Objective:
To quantify changes in extreme precipitation storm-intensity patterns resulting from a change in climate.

Approach:
The approach is to statistically analyze high resolution, historical rain-gauge data that have been evaluated for effects of climate change on dry times between storms (TBS). From these data, Huff-curve precipitation pattern representations will be developed and compared. Huff curves are monthly probabilistic representations of dimensionless mass curves of precipitation (dimensionless duration vs. accumulated depth). They are the isopleths of the probability distributions of storm depth given storm elapsed time, and have been shown to be spatially and temporally robust with respect to factors that affect their development. Data will come from three weighing-bucket rain gauges spaced approximately 1.5 km from each other with records dating to approximately 1940. These gauges are located on the N. Appalachian Experimental Watershed (NAEW) near Coshocton, Ohio. A student from the University of Mississippi will be hired through the university to help with the analyses.

Last Modified: 4/24/2014
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