1. Statistical Hydrology and Flood Frequency

2. Continuous and Discrete Data

3. Siletz River, Oregon

4. Linear Trend
Periodic Trend
Change in Variance
Change in Average

5. Relative Frequency Histogram - Skew

6. Cumulative Frequency Histogram

7. Mean
Variance
Skewness

8. Continuous Probability Density Function

9. Mixed Freq Dist’n Model

10. Effect of skewness on a distribution

11. Generalized skew coefficients

12. Relationship return period and return period

13. Flow Duration Curves Percent time flow value equaled or exceeded

14. Binomial Probability Mass Function

15. Exponential Distribution

16. Log Normal Dist
Normal Dist
Four PDFs matched to Siletz River data

17. Normal Probability Paper

18. Lognormal Probability Paper

19. Plotting position = m/(n+1)
Lognormal Plot of Data - confidence intervals

20. Various Methods for plotting Probability of exceedance

21. Comparison of four fitted CDFs

22. Normal probability plot of river data-S S X
Normal probability plot of river data