Review for Exam #1

Department of Earth Science |Northeastern Illinois University

PRINCIPLES OF HYDROGEOLOGY
ESCI 337
Spring, 2004

Review for Exam #1 (February 3, 2004) Dr. Sanders

On Exam #1, you should be able to do the following:

Hydrologic Cycle and Making Quantitative Calculations

v Draw a diagram illustrating the hydrologic cycle, and explain each of the processes in the cycle.

v Write an explanation of how the hydrologic equation works.

v Given a hydrologic system, identify inflows and outflows, tell where water might be stored in the system, and explain how changes in storage might be accommodated in the system.

v Construct a water budget for a given hydrologic system.

v Describe instruments used to measure precipitation and streamflow.

v Work with different units of hydrologic measurement for length, area, volume, velocity, volumetric flow rate (discharge), and temperature.

v Determine the number of significant figures appropriate in a quantitative estimation. (Visit these websites for a good summary and a pretty good summary of the rules for counting and calculating with "sig figs".)

v Use dimensional analysis (also known as the factor-label method) to solve quantitative hydrogeologic problems.

v Determine the correct number of significant figures to use in reporting the results of hydrogeologic calculations.

Drainage Basin Delineation

v Write a definition of the concept of drainage basin.

v Using a topographic map, select any point on a stream and outline the drainage basin for that point.

Estimating Effective Uniform Depth

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

v Use the dot-grid method to find a map area.

v Use a planimeter to find a map area.

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

Stream Flow and Hydrographs

v Collect stream flow data from the USGS web site.

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

v Separate a hydrograph into its two main components: runoff and baseflow. (Here's some really neat software that will do this automatically. It's rather new and its possibilities are yet to be explored. Lots of research potential here!)

Department of Earth Science | Northeastern Illinois University