crafting a hopper / basin

[mrmisior]

I need to craft a basin on a wall to collect water flowing trough a couple of cracks in the wall.
To then divert the water from this basin into a gutter below.
I already have a gutter running along the wall (below the cracks) which currently captures about 40% of the water.
The rest 60% splatters and goes on the ground.
The gutter has enough capacity.

The wall is an uneven surface concrete/stone.
Cracks are about 12 inches apart so would need to make something this big.

Or perhaps cement a couple of 68mm right angle bends to the wall right over the cracks?

https://www.toolstation.com/68mm-offset-bend/p34161

Any ideas?

Yes, I know, it would be a solution to plug the cracks but my up hill neighbour
has enough problems with the flooding as it is. If my system works, I could even enlarge the cracks to take more water.

 

[Alastairreid]

https://www.toolstation.com/150mm-h...MI87zljPXW5wIVh_hRCh0A3ggBEAQYASABEgJZF_D_BwE

 

[mrmisior]

thank you.
i saw that before and disregarded due to the unevenness of the wall of up to 2 inches (holes and concrete chunks protruding).
also, the water pressure during heavy rain, causes the water to shoot like a waterfall.

if i was to smooth out that section of the wall with cement first, then it could work.

i actually collected some rocks to form a basin underneath, thinking to cement over the top of the rocks, allow for the gutter on a side.
just not sure if cementing the 90deg 68mm bends right into the wall would not be better/easier?