Module 1: Hydrologic Cycle
Lecture 3: Hydrologic losses
 
Interception
  • Interception is the part of the rainfall that is intercepted by the earth’s surface and which subsequently evaporates.
  • The interception can take place by vegetal cover or depression storage in puddles and in land formations such as rills and furrows. 
  • Interception can amount up to 15-50% of precipitation, which is a significant part of the water balance.
Depression storage 
  • Depression storage is the natural depressions within a catchment area which store runoff. Generally, after the depression storage is filled, runoff starts.
  • A paved surface will not detain as much water as a recently furrowed field.
  • The relative importance of depression storage in determining the runoff from a given storm depends on the amount and intensity of precipitation in the storm.