Engineering project: Harvesting energy from natural water fall

[terry1993]

Homework Statement

the design of a micro turbine hat can use rainfall/ greywater in standard household or building to convert the fall of water into electrical energy that can be stored to be used when required.

Relevant Equations

im not sure what equations would be needed

- design of a micro-turbine based on different scenarios of waterfalls
- build a system that involves a battery for storing power
- test in the lab
I have attached a image. I know the image is not very detailed but wanting some advice on this situation. I have done some water calculations on how much water I believe will be used on a daily basis and was planning on testing this theory in the scenario shown below. can someone give me some advice on this please?

also part of this is to design a micro turbine but not really sure how to go about that

 

[Lnewqban]

The main problem with drain pipe systems is that the flow relies on gravity and pipes slope, as small as 1/8 of an inch for each foot of length.
Therefore, the height differential is very small for any turbine to work properly, which also causes a significant obstruction to the flow in such systems.

 

[marcusl]

Put it in a downspout. If you get rainstorms like we do in Colorado, you’ll need more than a mini turbine.

 

[terry1993]

is there any sort of turbine you would recommend for this type of testing