Quality Assurance

Duplicate samples were collected for three suspended-sediment samples for quality assurance purposes to determine the variability that might occur during the sampling process. The sampling method was precise to 5–7 percent. The results of the duplicates are shown in appendix E (table E1).

Sixteen bedload-sediment samples contained an A and a B set. A one-to-one line shown in figure E1 represents a comparison between each sample with an A and a B set. Data points closer to the one-to-one line are more precise than data points farther from the line.