How may liters per Qsec?

Answer 1

Firstly its not Qsec but Cusec i.e. cubic foot per second.

Cusec is a measure of flow rate and is informal shorthand for cubic foot per second (28.317 liters per second). In the United States it is generally applied to water flow, particularly in rivers. Other informal synonyms are cfs and second-feet.

• 1 ft3s-1 = 0.028316847m3s-1 1 ft3s-1 = 1 cusec
• 1 ft3s-1 = 28.316847 litre s-1 1 cubic foot per minute = 1 cufm
• 1 cufm = 1.699m3h-1 1 cufm = 28.32 litre min-1
• 1 gallon per minute = 0.7577 litre s-1 1 gallon per minute = 7.577x10-5m3s-1