The stability of a floating body is determined by the relative position of the center of gravity of the floating body and its metacenter. At tilted position when the metacenter M is below the center of gravity, the two forces, buoyant force and the weight of the body, is said to be in the state of:

In an open channel flow, the discharge at a certain section can be measured by the use of the weir, given by the equation:
 

Q=23C2g LH3/2+815C2g tan(12θ) H5/2

 

where Q is the discharge, C is the coefficient of discharge, H is the head, g is gravitational acceleration. This formula is for: