A Three-Parameter S-Shaped Function of Flood Return Period and Damage

Table 3

Function fitting results in 1999.

Function	Parameter	Value	Standard error	Adj. -squared
Gompertz	(100 million)	306.08	11.86	0.99
	(year)	120.53	11.33
		0.0088	0.0011
Logistics	(100 million)	301.30	14.86	0.97
	(year)	166.59	16.93
		0.015	0.0025
Hyperbolic tangent	(100 million)	301.31	14.86	0.97
	(year)	166.62	16.93
		0.0074	0.0013