Stream Flow Flashcards

1
Q

Application of common methods for base flow seperation

A

1) Draw a base flow line
2) Time after peak to reach base flow
N=0.8A^(0.2)
3) Draw line to mid point of unit rainfall scale (lag time) 4 x lag time = baseflow

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2
Q

Application of common methods to estimate effective rainfall

A
  • contributes to direct runoff (i.e. infiltration losses, interception losses)

1) Assume start of rainfall is losses
- after continuous loss
- poor estimate

2) Proportional loss

3) Index method
- assumes constant rate
- anything below lost
= (catchment rainfall - directrunoff)/ (storm duration)

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