Metadata
Author: Englishtainment upload
Data
Welsh[cy]
Mae'n golygu goblygiadau sylweddol i allu carthffosydd i ymdopi â llif dŵr, ac yn wir amser crynhoi'r dŵr ffo hwnnw.
English[en]
It has significant implications for the capacity of sewers to cope with the flow of water and, indeed, the time of concentration of such run-off.