You (well, some of you!) plotted graphs with time in hours on the horizontal axis, and two vertical axes - one for precipitation and one for discharge. You plotted your precipitation as a bar graph, and your river discharge as a line graph. Most of you managed to label the peak rainfall, peak discharge, lag time, rising limb and falling limb onto your graph.
If you need a reminder, go back and revisit the BBC Scotland site that we looked at before:
We also had a quick look at factors that affect the shapes of hydrographs - e.g. geology, antecedent weather conditions, drainage basin size/shape, vegetation, relief, drainage density, etc. Make sure you can talk about each of these factors, and that you understand how each one would affect the shape of the hydrograph.
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