My main building roof
I need to know the flow rate (FR, for example Litre per minute) of water coming out from the gutter of this roof. The easiest way would be catching the flowing water coming out from its downspout with a bucket and time it. However, the opening of the downspout pipe does not allow me to do that conveniently as the opening is very close to the floor.
My carport roof
I have my carport roofed with corrugated plastic sheet. The dimension of the roof is known. The number of the "valleys" is also known. I have measured flow rate of 1 valley during rain that i believe the maximum rain rate.
Note: my main building roof and carport roof have different slope.
Now I need to check if my understanding is correct:
- I can get the total FR of my carport roof by simply doing [the FR of 1 valley] x [ number of valleys]. Is this acceptable?
- I can approximate the FR of my main building by simply doing [Carport FR] x [ Area of main building roof] : [ Area of carport roof]. Is this acceptable?
- Roof flow rate does not have anything to do with roof slope. Is this correct?