Experimental Study on Calculation Method of Drainage Capacity of Drainage Facilities Affected by Overtopping on Artificial Island

Table 3

Summary of west drainage and floodplain in different schemes.

No	Drain opening condition	Design scheme		Optimization scheme I		Optimization scheme II
		Return period 100a	Return period 300a	Return period 100a	Return period 300a	Return period 300a
		Floodplain	Floodplain	Floodplain	Floodplain	Floodplain
K1∼K3	4# opening	Yes	Yes	No	Yes	No
K4∼K8	3#+ overtopping pump opening	Yes	Yes	No	Yes	No
K9∼K14	2# opening	Yes	Yes	No	Yes	No
K15∼K19	1# opening	No	Yes	No	Yes	No