I just don't have the time ...

Published January 25, 2021 00:26 by William Turner, Trustee, Chief Hydrogeologist, CEO, QB, and licensed escrow officer at WaterBank

I just don't have the time but it will require an integration over time and an integration over falling head and Bernoullis equation. Should be fairly easy. When you have the equation use Wolframalpha.com to solve it. Remember that inflow will retard "H"