Mahesh this link might help ...

Published by

Mahesh

this link might help you 

https://www.gov.nl.ca/eccm/files/waterres-training-adww-2014-05-jason-phillips.pdf

You'll note 2 meter depth

Now I have no idea if this will help or not, but it may be handy to automate this process by registering all of the data properly - see www.wateroffice.com - than combining that with a machine learning tool that ingests connected asset data, your constraints, goals and the hydraulic model such as Optimatics - where Water Office has been integrated with. 

Gr John