Department of Earth Science |Northeastern Illinois University

PRINCIPLES OF HYDROGEOLOGY
ESCI 337
Fall, 2005

Daily Objectives #6 (September 19, 2005)                                        Dr. Sanders

By the end of today's class, you should be able to do the following:

v Write in your own words a description of the meaning of Effective Uniform Depth (EUD).

v Use the arithmetic mean method and the Thiessen method to calculate EUD of precipitation for an area.

v    Collect streamflow data from the USGS web site (you should have done this already for Homework #2, due today).

v    Construct a hydrograph and analyze the factors that determine its shape.

v    Separate a hydrograph into its two main components: runoff and baseflow.

You may wish to check precipitation records online by going to this NOAA site.  First, find a station near your gage.  Then, enter dates for which you want records, and then conduct the search.  It takes a few minutes, but eventually you will get a response saying your records are ready.  You'll be able to click on a link to open them.

Department of Earth Science | Northeastern Illinois University

© 2005 Laura L. Sanders.  Last updated September 19, 2005.