Solution Exercise 7
Details of the solution are not presented here; readers are instead encouraged to review Box 4↗ of Graphical Construction of Groundwater Flow Nets↗ by Poeter and Hsieh (2020) The book is available as a free download at that link. The book provides further instruction and examples of using flow nets to solve for groundwater flow. A figure from Poeter and Hsieh (2020) for a similar problem is shown here.
(from Poeter & Hsieh, 2020)