Simplest thing is please refer to standard Surface loading Rates given in various references. For Raw water they vary from 4 -6 cum/sqm/hr (on plan area) for tube size of 50mm x 50mm with slant length of 600mm with inclination of 60 degree. If you want to go by first principle then there are formulae available linking Settling velocity of solids to Surface loading rates in renowned reference books.
Published by Shirish Kardile, Consulting Engineer at K Consultation
Simplest thing is please refer to standard Surface loading Rates given in various references. For Raw water they vary from 4 -6 cum/sqm/hr (on plan area) for tube size of 50mm x 50mm with slant length of 600mm with inclination of 60 degree.
If you want to go by first principle then there are formulae available linking Settling velocity of solids to Surface loading rates in renowned reference books.