Streamflow relationship to Dam removal. LOC estimates are a little closer to the actual measured streamflows than the regression
Abline is forest green dashed line. This is Exercise 10.3
Relationship between lowering of streambed and dam removal. regression abline is displayed as forest green. The legend has the other information.
Residuals: Min 1Q Median 3Q Max -1.44350 -0.49350 0.09426 0.44426 1.50413 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -2.07064 0.38306 -5.405 0.00012 *** Yrs -0.16698 0.02617 -6.381 2.41e-05 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Residual standard error: 0.8448 on 13 degrees of freedom Multiple R-squared: 0.758, Adjusted R-squared: 0.7394 F-statistic: 40.72 on 1 and 13 DF, p-value: 2.414e-05
Exercise 10.2 tau = 0.7333333. True Tau is NOT equal to zero. %95 confidence level, LCL = -10 Theil slope = 10 UCL = 85
Drainage vs Increased streamflow. So, variance of residuals does NOT vary with the fitted values and appear to follow a normal distribution. This model should mee the require assumptions.
Using log transformation , to the y variable, we can observe a linear relationship. Although we now need to perform a bias correction to Q90 values. The bias correction needs to be performed to make sure no underestimation of the Observed Q90 values
Relation between drainage area and Q90 values.
Relationship--Non-Linear--Totally Dissolved Solids & Uranium Using Spearman's rank correlation I found out that there is a positive indication that High uranium concentrations tend to relate to TDS(Total Dissolved Solids). Although there is a WEAK relation given the Spearman's rho correlation coefficient (rho = 0.11). However----- Using Kendall's rank correlation tau we can reject the null hypothesis that relationship between Uranium and TDS- is not significant.
Plotting seas with Corbicula data corresponding to years
The Shapiro-Wilk Test was used for pH measurements in water. The ph measurements were obtained by using a piezometer.
Hodges-Lehman is used as a estimation of conductance for the Shennandoah River
The Median of All Possible Ratios
Data: downgradient and Up gradient . Tis is a two-sided alternative test using the Wilcoxon rank sum test with continuity correction. The vertical line represents the difference of the observed means. the rank and sum test; plus the permutation test on the means will find the difference in the two groups.
Chloride concentration Grandiorite and Quartz Monozonite
this plot is for comparing two different rock types
Logarithm Plot if Annual Peak Discharge at Middlebury, VT
quantile plot describing positive skewness