O-LevelGeographyThe natural environmentOct/Nov 2013Paper 2 Q730 Marks
Students from Santiago, Chile, were studying how the characteristics of a river change downstream. They wanted to investigate possible changes in velocity (speed of flow) downstream. They decided to test the following hypotheses: Hypothesis 1: Velocity increases downstream. Hypothesis 2: Velocity increases as the hydraulic radius of the river channel increases. Hydraulic radius is a measurement which indicates how much friction there is between the river channel and the flow of the river.
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