Three substantially different methods have been used to relate the runoff in the
Little Washita River, OK, to climate parameters. One method uses a detailed watershed
runoff model SWAT, which integrates several well established hydrologic runoff model
components. The second approach is based on a mean monthly water budget and
calculates runoff as one of its components. The third approach simply correlates
measured runoff with measured weather parameters. The timescales of these tlrree
methods are substantially different: daily, monthly, and seasonal (3-months) for the three
methods, respectively. The timescale is the shortest for the most process oriented model
and the longest for the purely statistical method.
The simplest of these three methods in terms of data requirement and
computational effort is described herein and applied to the Little Washita Watershed.
The other two are explained in reports by Mohseni and Stefan (1996) and Hanratty
National Agricultural Water Quality Laboratory, US Department of Agriculture
Kletti, Laura L.; Stefan, Heinz G..
Correlations Between Climate and Streamflow in the Little Washita River Watershed, OK.
St. Anthony Falls Laboratory.
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