Hydrology basics, episode 2: the rhythm of flood occurrences
“This was a 100-year event”. This type of sentence is often heard in the news after a flood or a storm hits somewhere, as it does a good job at carrying the rarity of what happened.
Hydrology basics, episode 1: streamflow, precipitation and evapotranspiration
How does water end up flowing in rivers? As schematized below, it is the result of processes that have taken place in the river basin, also known as a catchment and delineated by a red line in the figure.