Using the regression equations in Problem 1, find the predicted floods for the North Fork,...

Using the regression equations in Problem 1, find the predicted floods for the North Fork, Shenandoah River, at Cootes Store. Drainage area = 215 mi2 and channel slope = 44.3 ft/mi.

Problem 1

The results of a multiple regression analysis of over 200 flood records in Virginia led to the following regional flood frequency equations:

where the flood discharge for the given frequency is in cfs, A is the drainage area in mi2, and S is the channel slope in ft/mi (measured between the points that are 10 and 85% of the total river miles upstream of the gauging station to the drainage divide). Devise a method for graphically portraying these regional flood frequency relations. (Note that there are four factors: Q, T,A, and S.)