Linking diurnal cycles of river flow to interannual variations in climate

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Abstract

Many rivers in the Western United States have diurnal variations exceeding 10% of their mean flow in the spring and summer months. The shape and timing of the diurnal cycle is influenced by an interplay of the snow, topography, vegetation, and meteorology in a basin, and the measured result differs between wet and dry years. The largest interannual differences occur during the latter half of the melt season, as the snowline retreats to the highest elevations and most shaded slopes in a basin. In most basins, during this period, the hour of peak discharge shifts to later in the day, and the relative amplitude of the diurnal cycle decreases. The magnitude and rate of these changes in the diurnal cycle vary between years and may provide clues about how long- term hydroclimatic variations affect short-term basin dynamics.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Linking diurnal cycles of river flow to interannual variations in climate
Year Published 2003
Language English
Publisher American Meteorological Society
Publisher location Lowell, MA
Contributing office(s) Pacific Regional Director's Office, San Francisco Bay-Delta
Description 5 p.
Larger Work Type Conference Paper
Larger Work Subtype Conference Paper
Larger Work Title 17th Conference on Hydrology - 2003 AMS Annual Meeting
First page 1
Last page 5
Conference Title 83rd Meeting of the American Meteorological Society, 17th Conference
Conference Location Long Beach, CA
Conference Date February 9, 2003
Country United States
Online Only (Y/N) N
Additional Online Files (Y/N) N