Install standard size mesh gutter covers over the entire gutter that will lead into the cistern.
Cistern no gutters.
The water might have been used by the household if there was no city water at the time.
If you join too many downspouts before they enter the cistern you could have a constriction that would be problematic.
Traditionally this involves harvesting the rain from a roof.
Put them where they need to be.
The water was collected from the roof gutters.
Remember that the x section of a 4 pipe is twice that of a 3 pipe.
Cistern covers are 2 x2 and are cast in the floor.
This is a cistern i made from some pressure treated 2x6 material and a 55 gallon plastic juice drum.
Sweep all debris from the roof and gutters leading to the chosen downspout by using a broom.
It is more important that you have unrestricted flow into the cistern.
A cistern is an underground tank for storing water.
A system of gutters and downspouts directs the rainwater collected by the roof to the storage cistern.
I got the used drum locally for 15 and the wood came from my scrap bin.
Rainwater harvesting is collecting the run off from a structure or other impervious surface in order to store it for later use.