OT = 



\b X ^' 



X [ticb X S) 



where 



OT = prototype overtopping rate in cfs/ft 



A^l, = cross-sectional area of model catch basin, ft 



5 = scale factor, either 20 for 1 :20 or 30 for 1 :30 



H^l, = change in water surface elevation in the model 

 catch basin, ft 



^run - ti"^^ of model test run, sec 



^flume - width of model test flume, ft 



For each set of tests, the cross-sectional area of the model catch basin, 

 flume width, time of model run, and scale factor were constants. The over- 

 topping rate could therefore be calculated as 



run flume 



where the first term is a constant and the only variable is change in eleva- 

 tion of the water surface in the catch basin. 



Chapter 2 Test Facility 



