Geology 127 (Hydrogeology)

California State University, Sacramento

Week 9: Flow net workshop and Non steady-state flow to a well: Theis solution for a confined aquifer


Upon completion of this unit students should be able to:

  • Read, interpret and construct a flow net

  • Make simple calculations using a flow net

  • Use non steady-state equations for flow in confined and unconfined aquifers to estimate hydraulic head at a known distance between two monitoring points.

  • List and discuss the assumptions that are associated with the Theis equation.

  • Use well function tables to interpolate using the Theis equation.


Reading Assignments:

Flow net workshop: review flow net reading from last week:  Fetter, pp. 132-137 and handout


Lecture 13: Non steady-state flow, Theis equation- Fetter, pp. 138-146

Lecture notes:

Lecture 13


Homework Assignment:

Homework Assignment: Flow net homework

I will pass out a flow net homework problem in class.  If you miss class, e-mail me and I will get you a copy.  I am not posting the assignment on the web page because of copyright issues.


Due date:  Friday, Oct. 26


Point value for flow net homework:  100 points