Comparing Hereford and Boscastle flood hydrographOnline version A quiz to help you work out what mark you would get for your description of the Boscastle flood hydrograph by Raphael Heath 1 Did you include data on the rainfall amounts in mm e.g. total of about 70mm or max of 15mm in half an hour? a yes b no 2 Did you include data on the river flow in cumecs, incluidng the peak flow of 100 cumecs? a yes b no 3 Did you refer to timings / periods of time about the data? (e.g. rainfall lasted 4.hours, storm flow for around 7.5 hours) a yes b no 4 Did you refer to the lag time and comment on how long it was (about 3 hours)? a yes b no 5 Did you refer to the baseflow and stormflow or similar concepts a yes b no 6 Did you refer to when bankfull discharge was reached/ length of flood flow being 4.5 hours? a yes b no 7 Did you compare the rising and falling limb of the hydrograph (similar but rising took a bit longer)? a yes b no 8 Did you compare the peak flow, lag time and flood time with Hereford 2007? a Yes b No Feedback 8 Remember with a describe question you dont want to stray into trying to explain the data!
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