This lecture talks about flow nets and how to draw them by hand. A flow net is drawn by hand as a demonstration, and various calculations including head, pressure, uplift force, and gradient are performed with it.

Critical Questions to Consider:
1) What types of things can we compute from a flow net?
2) What do the equipotential lines represent? Flow lines?
3) Why is the smallest element on a flow net associated with the largest hydraulic gradient?