Hydrology - Water temperature in a river by ert554898

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									  Hydrology :
Water temperature
    in a river
         Lucie Zimmlová

     Anglo-Czech High School
 České Budějovice - Czech Republic
    Main ideas and aims of the
            worksheet:
 To get familiar with water temperature
  variability in a river
 To learn to search for data
   To learn to work with data
   To use GLOBE pages and other Internet
    pages
     Structure of the worksheet
 Background
 Learning activities
 Formulation of the hypothesis
 Main task
             • - basic part
             • - more difficult part
             • - conclusions
   Alternative task - a long-term project
                 Background
   Importance of water        Relation of water
    quality for organisms       temperature and water
                                oxygen level
           Learning activities
   1. Practical measurements
   2. Data search and making graphs

                            - temperature
                            - pH
                            - conductivity...
              Hypothesis
“Does the water temperature usually increase
  or fall with the distance from the source?”




                 Why?
   Actual water                  Main task
    temperature in a river      Part one (basic)

         Source of the data: Internet
          pages of hydrometeorological
          institute

                   Using EXCEL

                         Graph of water temperature
                          distribution from the river
                          source to the river outfall ...
         …reading the graphs
   “How many graphs do verify your
    hypothesis?”
        “How many graphs do reject your
         hypothesis?”
             “How many graphs do neither verify
              nor reject your hypothesis?”

“Now, is your hypothesis correct?”
              Main task
         Part two (more difficult)
 Source of the data: GLOBE database
 Two schools doing measurements in the
  same river
           • !!!Are you sure???
           • - find “Water body name”
           • - write e-mail to schools
           Work with the data
                       (basic)



   Graphs and tables of all water temperature
    data

        - the lowest temperature measured
        - the highest temperature measured

        ...
          Work with the data
                   (advanced)


   Find a day of every month during one year
    that both schools measured water
    temperature in

   Fill the table …
                Fill the table
                                                  Higher temperature
Month   School 1 (nearer to   School 2 (nearer to
                                                  measured by school
         the river source)     the river outfall)
                                                       number:
   I
  II
 III
 IV
  V
 VI
 VII
 VIII
 IX
  X
 XI
 XII
   Answer the question:

“Does the data verify your hypothesis?”




If not, try to tell why!
                Conclusions
                   (main task)
   “Does the water temperature usually
    increase or fall with the distance from the
    river?”
   “Why do the data appear that do not verify
    the hypothesis, although you had found out,
    that the hypothesis is right?”
   “Give a couple of suggestions of factors that
    can influence this!”
Alternative task - a long-term
            project
 Make various measurements from the
  source to the outfall of a river or a stream
 Observe animals and plants
 Draw maps, graphs, make tables...
 Make it public!

    Only if you know the river, you are
             able to protect it!!!
          Teacher’s notes
 Subjects: biology, chemistry, geography
 Age: 12 to 18
 Time needed (in computer lab):

          • - part one: 45 min
          • - part two: 60 min
               Prerequisity
   Being familiar with EXCEL (or similar)
           Recommendation
   Teacher should give an advice to the
    student which schools are appropriate for
    the task two:
                            - making measurements
                               in the same river
                            - having enough data
     Some factors that can
influence temperature in a river
 Local weather (air temperature, rainfall…)
 Discharges e.g. from factories, power
  stations
 Affluents
 River depth
 Dams
 Rapids...
   Water temperature in Vltava river
               2002
                 25,0




                 20,0
TEMPERATURE °C




                 15,0




                 10,0



                                                                     Vltava - Vyšší Brod
                   5,0
                                                                     Vltava - České Budějovice



                   0,0
                     2




                                                       02




                                                                                                       02
                            02




                                                 2




                                                                 2




                                                                                                 2




                                                                                                                 2
                                       2




                                                                            2




                                                                                                                           2
                                                                                     02
                 I-0




                                              -0




                                                              -0




                                                                                              -0




                                                                                                              -0
                                    -0




                                                                        I-0




                                                                                                                       I-0
                                                     V-




                                                                                                     X-
                         II-




                                                                                  II-
                                                            VI




                                                                                                            XI
                                 III




                                           IV




                                                                                           IX
                                                                      VI




                                                                                                                     XI
                                                                                VI




                                                                     MONTHS
Thank you for your attention!



          Do you have any questions?

								
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