River discharge is the volume of water that flows through a river per second.
Measured in cumecs - cubic metres per second (m3/s)
Hydrographs show how discharge at a certain point of river chages over time.
storm hydrographs - at time of storm:
Peak discharge: highest discharge during time period shown on graph
Lag time: delay between peak rainfall and peak discharege
Rising limb: the increase in river discharge as rain water flows into river
Fallig limb: the decrease in river disharge as river…