Journal
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
Volume 3, Issue -, Pages 125-138Publisher
ELSEVIER
DOI: 10.1016/j.ejrh.2014.10.006
Keywords
Precipitation trends; Temporal change point; Climate change; GCM down-scaling; Southern Appalachian region; Tennessee Valley Authority
Categories
Funding
- Institute of a Secure and Sustainable Environment (ISSE)
- University of Tennessee, Knoxville, United States
Ask authors/readers for more resources
Study region: Upper Tennessee River Basin, United States. Study focus: The temporal variation of precipitation in the Upper Tennessee River Basin was investigated by utilizing datasets from the Tennessee Valley Authority (TVA) rain gauge network consisting of 56 rain gauges (1990-2010), and the National Weather Service (NWS) analyzing mean areal precipitation values for 78 subbasins (1950-2009). The Mann-Kendall trend test, Mann-Kendall-Sneyers test, Yamamoto Method, and Morlet's wavelet were applied to reveal precipitation trends and abrupt changes in annual precipitation volumes. New hydrological insights for the region: Analyses indicated that: (a) 11% of the 78 subbasins experienced statistically significant increasing or decreasing precipitation over a 50-year period; (b) seasonal precipitation trends based on monthly volumes varied, with the summer and autumn series showing the largest significant increases; (c) abrupt changes in annual precipitation volumes were detected among subbasins corresponding to strong El Nino events; and (d) several subbasins displayed significant periodicities of 1, 6, 18, and 22 years in monthly volumes. These findings provide key information for regional precipitation down-scaling from global climate change models where the Appalachian mountainous terrain greatly impacts down-scaling results. (C) 2014 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available