Slide 9 of 19
Notes:
Blue-Stream flows predicted by the soil-water balance
Green-Stream flows predicted using a constant-fraction method
Red-Observed stream flows
In common practice, runoff is calculated as a constant fraction of rainfall
- Soil Conservation Service method of rainfall abstractions
- To test the validity of this approach, a straight line was fitted to a graph of precipitation versus stream flows
Comparing the blue and green lines, the soil-water balance captures stream flow extremes with improved accuracy
It is evident that stream flow is strongly influenced by precipitation
