Daily Questions before Class!
What‘s the last 4 numbers of your student ID and name? (Eg: 0234李XX)
____________
If you will design open channels for Changsha city, which flow will you choose?
Subcritical flow
Critical flow
Supercritical flow
Depend on government’ budget
If Fr>1, the flow
is subcritical
has high velocity
has high depth
has high energy
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