Present your findings with a range of quantitative and/or qualitative techniques. Each technique should be accurately drawn and appropriate for the information being presented. Here are some suggestions.

River regimes

You can use secondary data to construct a river regime graph. Plot discharge on the y-axis and date on the x-axis. Note that the conventional water year runs from 1 October to 30 September, as show in the example below. Plotting the graph from autumn to autumn avoids splitting the winter floods.

Slapton Wood river regime
Annual river regime for Slapton Wood Stream by Field Studies Council.

Storm hydrographs

You can combine data you have collected yourself (such as stream discharge) with rainfall data from secondary sources to construct a storm hydrograph. Time is plotted on the x-axis. There are two y-axes, with a line graph for discharge and a bar graph for rainfall. It is often useful to draw the line graph and the bar chart as parallel but separated graphs.

Weekly hydrograph
Slapton Wood Stream by Field Studies Council.

The hydrograph shows stream discharge (in litres per second) and rainfall for 7 days at the end of January for a small stream in south-west England. Notice how a hydrograph constructed using real-world data does not always look like a textbook storm hydrograph.

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