A Poisson Cluster Stochastic Rainfall Generator That Accounts for the Interannual Variability of Rainfall Statistics: Validation at Various Geographic Locations across the United States

Table 2

Performance comparison between THM and the traditional approach in reproducing design flow values.

Recurrence interval	Type of statistic	THM			Traditional approach
		CN = 70	CN = 80	CN = 90	CN = 70	CN = 80	CN = 90
100 years	Mean	−0.184	−0.178	−0.117	−0.468	−0.420	−0.344
	Standard deviation	0.606	0.521	0.334	0.388	0.373	0.312
	Within ±20%	0.370	0.460	0.680	0.257	0.324	0.397
50 years	Mean	−0.225	−0.187	−0.123	−0.477	−0.429	−0.348
	Standard deviation	0.518	0.530	0.335	0.388	0.368	0.314
	Within ±20%	0.370	0.450	0.680	0.265	0.324	0.471
30 years	Mean	−0.226	−0.191	−0.126	−0.481	−0.432	−0.349
	Standard deviation	0.529	0.542	0.342	0.392	0.370	0.322
	Within ±20%	0.340	0.450	0.660	0.257	0.324	0.463