Trends in Floods and Low Flows in the U.S.: Impact of Spatial CorrelationEPA Grant Number: U915775
Title: Trends in Floods and Low Flows in the U.S.: Impact of Spatial Correlation
Investigators: Douglas, Ellen M.
Institution: Tufts University
EPA Project Officer: Carleton, James N
Project Period: May 1, 2000 through May 1, 2002
Project Amount: $61,750
RFA: STAR Graduate Fellowships (2000) RFA Text | Recipients Lists
Research Category: Academic Fellowships , Fellowship - Environmental Statistics , Environmental Statistics
The objectives of this study are to: (1) investigate the existence of trends in flood and low flows to assess the potential impact of climate change and to compare with previous studies; and (2) evaluate the effect of spatial correlation of flow records on the interpretation of hypothesis test results by developing a hypothesis test that accounts for the spatial correlation of the data.
Trends in flood and low flows in the United States will be evaluated using a regional average Kendall's S trend test at two spatial scales and over two timeframes. Field significance will be assessed using a bootstrap methodology to account for the regional cross-correlation of streamflows.
The expected results of this research will demonstrate that the cross-correlation of flow records dramatically reduces the effective number of samples available for trend assessment.