LAR 512 – Fall 2002

 

PROBLEM #2 – INTRODUCTION TO HYDROLOGIC DATA


Close this page to return to the list of problems. Click here for a Word version of this problem.

 

http://water.usgs.gov/waterwatch/

 

Go to the United States Geological Survey water resources web site above and complete the following questions:

 

  1. Real-Time Streamflow
    1. Summary-Day of Year

                                                             i.      South Atlantic-Gulf

1.      Last 45 Days Trendline

a.       What is the approximate minimum stream flow index? __________

b.      What is the approximate date of the minimum stream flow index? __________

c.       What is the approximate maximum stream flow index? __________

d.      What is the approximate date of the minimum stream flow index? __________

    1. Map-Day of Year

                                                             i.      North Carolina

1.      Neuse River Near Falls, NC (dot in northern Wake County)

a.       What is the discharge rate (Q) in cubic feet per second (cfs) today at this station? __________

b.      What is the date of your analysis? __________

2.      Neuse River Near Clayton, NC (southeast of Fall station and just over the Wake County line)

a.       What is the discharge rate (Q) in cubic feet per second (cfs) today at this station? __________

b.      What is the date of your analysis? __________

3.      What are the key factors that might explain the difference in the discharge rate or flow rates at these two stations?

a.       ______________________________________

b.      ______________________________________

c.       ______________________________________

2.      Daily Streamflow

a.    Map Day of Year

i.         North Carolina

1.      What region(s) of North Carolina are the wettest? _______________________________________

2.      What region(s) of North Carolina are the driest? _______________________________________

3.   7-Day Average Streamflow

a.   South Atlantic-Gulf

i.   Average Streamflow Index

1.      What is the approximate minimum streamflow index? __________

3.      During what month and year does the minimum occur? __________

4.      What is the approximate maximum streamflow index? __________

5.      During what month and year does the minimum occur? __________

  1. Below Normal Streamflow
    1. Map-Week of Year (7-day flow)

                                                             i.      How many stream stations in North Carolina have Extreme Hydrologic Drought? __________

                                                           ii.      How many stream stations in North Carolina are below Normal? __________

                                                          iii.      Which other eastern seaboard states have below Normal streams stations? ____________________________________________