Log on to the Gauge Map website (www.gaugemap.co.uk) and zoom in to the map of the UK. The default map shows all the automated waterlevel monitoring stations on rivers and coasts. The circles are coloured according to the key on the left under the heading ‘Water Level’. Once you have zoomed in close enough to distinguish one of the green stations from its neighbours, click on it. You will find a named station and river above a chart showing the current river level and its history over the last week or so.
A ‘green’ river is likely to be within its ‘Typical Range’ but may have varied within that in recent days. Notice that above a particular level the chart changes to blue to represent ‘Flooding Possible’. The two black lines indicate ‘Recent Highest’ and ‘Highest Recorded’ river levels. Lower down there is a ‘Lowest Recorded’ river level. Click the white arrow in the green button to the lower left of the chart and you can view river levels over previous weeks. Selecting the white ‘information’ button to the lower right of the chart indicates precisely when the river was at the black line levels. As you drag your cursor along the river level you will see it shows the changing river height, date and time.
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