Storm Hydrograph (talking partners)
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  1. What two variables are plotted on a hydrograph. which one is on the horizontal axis and why? What units are used for each axis?
   
  2. Why is the discharge continuing to fall during the period that the rainstorm is occurring?
   
  3. What is the 'lag'? Why is there a 'lag?
   
  4. Why is the rising limb so steep? What flow contributes to the rising limb? What factors contribute to a steep rising limb?
   
  5. What is the 'peak'? What factors contribute to a 'flashy' hydrograph (with a high peak)?
   
  6. What is 'quickflow' or storm flow'?
   
  7. Why is the receding limb (or falling limb) not as steep as the rising limb?
   
  8. What is another name for baseflow? Why is baseflow higher after a storm than it was before it?
   
  9. Why does a U.K. river (like the Usk) not dry up completely even if it does not rain for two weeks or more?
   
  10. Sketch a hydrograph for a river in a wadi (desert gorge) - that only flows when there is a flash flood.