Exercise no. 4


                                           Rating curve


On the basis of the values of water stages and the corresponding discharges, calculate the rating
curve characterizing the H-Q relationship.


1.    Log (Q), Log(H)

2.    Point graph of the pairs [Log(H); Log(Q)]

3.    In the graph, show the trend (regression) line and its equation

4.    From the equation, read the value of a and b

5.    Apply logarithm on the equation

6.    b = log c => c = 10^b

7.    Create the equation of the rating curve putting the values of a and c

8.    For water stages ranging from 0,01 m to 0,75 m calculate the corresponding discharges

9.    Draw the rating curve in a graph (from the calculated pairs [Q, H]

10.  The final graph together with the rating curve’s equation = result.