of Earth Science |Northeastern
INTRODUCTION TO EARTH
(Due at the beginning of class, 2:00 pm, April 16,
How Much Water Is In That Stream?
and print out one year's worth of stream discharge data for a stream
Illinois. We will work with the data in class.
1) FIND THE
SOURCE OF ILLINOIS STREAM GAGE DATA
Keep a map of
Illinois handy--a road map is fine, or you can use one
of the maps in the classroom. Go to the USGS web site http://water.usgs.gov/.
Take these steps:
* Under "NWIS Web Water Data", click "Surface
* In the
fourth paragraph under "Introduction", click the link for "Daily
* Under "Site Location", click "State",
then click "Submit.
* Under "State", select "Illinois".
* Scroll down, and near the bottom of the page,
under "Choose Output
Format", select "Table of sites sorted by SITE NAME grouped by
(you will have to select the words "Site Name" and "Hydrologic Unit"
* Finally, scroll down a little further and
click the "Submit" button.
This will give
you a list of all the stream gages in Illinois.
DATA AVAILABLE ON THE WEB
Pick any stream
gage, and click on the Site Number. This will
take you to a site specifically for that particular gage. For
gage, it gives you numerous pieces of information about the watershed (also called drainage
Get to know
the watershed by going to the area near the top titled "Available
data for this site" and selecting such choices as "Station Site Map",
Home Page", and "EPA Surf Your Watershed" (click GO to visit each of
3) SELECT A
STREAM AND GAGE
Choose a stream
and gage that seem interesting to you. Try to
pick a stream and gage that nobody else in the class will choose!
RECORD IMPORTANT INFORMATION ABOUT THE GAGE
Find and record
(to hand in) the following information:
a. Stream name
b. Location of gaging station (the town/city,
the county, and the latitude/longitude)
c. Drainage area (square miles) (found on the
"Site home page")
d. Site maps: larger scale map giving the general
location in Illinois, and smaller scale map giving the location of the
gage on the stream (select "Site Map"). Printing black and white
or in color; either is acceptable.
e. How long has the gage has
been operating? From what date to what date? Is it still
operating? (To find this information, go to the "Site home page"
and look for the "period of record").
5) COLLECT ONE
YEAR'S WORTH OF DISCHARGE DATA
Data for this Site" menu, click on "Daily Data"
and GO. Under "Output Format", click "Table".
one-year time period--long ago, recent, or
anything in between! Go to the
boxes for "Begin date" and "End date", and enter the beginning and end
of a one-year
Be sure to use the correct format (YYYY-MM-DD). Also, be sure
the dates you enter fall within the "period of record"! (If you
an error message, that's probably why.)
Print the list (it may be several pages long).
data to class with you.
© 2007 Laura L. Sanders. Last
updated, April 8, 2007.