Hydraulic routing and unsteady flow

Question 1

Open Channel Hydraulic - assumptions

Answer 1

prismatic channel - cross section does not change
longitudinal dimension longer than transverse dimensions
bed slope &laquo_space;1
incompressible flow -> water density is constant

Question 2

steady uniform flow

Answer 2

change in time = o
change in direction = 0

Question 3

steady non-uniform flow

Answer 3

change in time = 0
change in direction does not equal 0

Question 4

Unsteady non-uniform flow

Answer 4

change in time does not equal 0
change in direction does not equal 0

Question 5

Finite Difference Method

Answer 5

not able to get analytical solution for most of the case of ODE and PDE’s
FDM needed to solve numerically
the method approximates its derivatives, PDE/ODE can be expressed by function itself and then solved numerically