Fluids using Bernoullis principle

[clergy]

Homework Statement

1. A reservoir is held in a valley behind a dam. The valley is 200m wide, and the reservoir extends 2.4km upstream (with a constant width).
In winter, the entire surface of the reservoir is covered by a 30cm thick sheet of ice. The density of ice is 920kg/m3.
A pipe through the dam releases water to drive a generator. The pipe is 8m below the surface of the reservoir. (12)
i. How fast does the water leave the pipe in summer?
ii. How fast does the water leave the pipe in winter?

Relevant Equations

Bernoullis Equation

Please help!

 

[haruspex]

Problem Statement: 1. A reservoir is held in a valley behind a dam. The valley is 200m wide, and the reservoir extends 2.4km upstream (with a constant width).
In winter, the entire surface of the reservoir is covered by a 30cm thick sheet of ice. The density of ice is 920kg/m3.
A pipe through the dam releases water to drive a generator. The pipe is 8m below the surface of the reservoir. (12)
i. How fast does the water leave the pipe in summer?
ii. How fast does the water leave the pipe in winter?
Relevant Equations: Bernoullis Equation

Please help!

Please show some attempt at part i, per forum rules.
For part ii, you are probably supposed to assume that the top of the ice is flush with the top of the dam wall, i.e. at exactly the same height as the water surface in summer. However, I suspect that in practice the ice would rise above the top of the dam, leading to the same weight in both.

 

[Chestermiller]

Do they tell you how much power the generator delivers? Without this, you won't be able to solve the problem.