Water: WARSSS
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Science & TechnologyApplications & DatabasesTechnical ToolsWARSSSDimensionless Flow Duration Curves
Science & TechnologyApplications & DatabasesTechnical ToolsWARSSSDimensionless Flow Duration CurvesDimensionless Flow Duration Curves
Prediction Level
Assessment
Steps
Hydrologic Relations1. USGS Regional Curves
2. Drainage Arearat
3. Field Calibration
4. Final Determination
Stream Morphology
5. Stream Classification
6. Dimensionless Ratios
Stability Analysis
7. Channel Stability
8. Bank Erosion Prediction
9. Bank Erosion Rates
Flow/Sediment Relations
Sediment Rating Curves
10. Flow Modifications
11. Dimensionless Flow
12. Bankfull Q & Sediment
13. Dimensionless SRCs
14. Bedload Rating
15. Flow Duration Curves
16. Flow-Related Yield
17. Flow-Related Increases
Supply Changes
18. Channel Changes
19. Bedload Transport
20. Hillslope Processes
21. Hillslope Sediment
22. Entrainment Calculation
Stability Consequences
23. Sed. Transport Changes
24. Aggradation Potential
25. Degradation
26. Enlargement
Summary Analysis
27. State Shift
28. Total Sediment
29. Departure Analysis
30. ID Loads by Category
This information is obtained from gauge station data and made dimensionless by dividing the mean daily discharge data by bankfull discharge. Bankfull discharge data is divided into all of the ranges of mean daily discharge and is plotted as in Figure 117 and Figure 118 (PDF, 13 kb, 1 p.) as an example of the application for Weminuche Creek. The user must develop dimensionless flow-duration curves from gauging stations that represent a similar hydro-physiographic region similar to the impaired stream being assessed.
Figure 117. Dimensionless flow-duration curve for streamflow in the Upper Salmon River area (Emmett, 1975)
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Many of the documents listed on this site are PDF files. Viewing a PDF file requires use of Adobe's free Acrobat Reader software. *EPA's PDF page provides information on downloading the software.