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

Table 2

Simulation results of flood damage (unit: 100 million CNY).

Return period (years)	Flood frequency	1999	2005	2030 A2	2050 A2
1000	0.001	312.0	457.3	1003.5	1556.3
500	0.002	291.0	427	939.09	1455.5
200	0.005	176.0	259.1	575.8	904.7
100	0.01	104.0	161.7	365.5	578
50	0.02	65.0	85.4	239.3	381.7
20	0.05	35.0	56.2	129.3	206.8
10	0.1	12.0	21.8	52.9	86.9
2	0.5	0.55	0.90	1.8	2.87