SEDIMENT

Sediment Analysis examines the health of the creek by means of assessing the size, type, and chemical composition of the creek's sediment.

At the creek, sediment samples are collected at each site through the use of an Ekman Dredge. These samples are taken to the lab where they are sieved, weighed, and tested for their chemical and soil composition. The four chemical aspects that the Study tests are pH level, nitrogen, phosphorus, and potassium. These four chemical compositions act as indicators of the health of the creek, as sudden changes in any of the chemical levels can present a danger to all life within the creek.

At the same time, the amount of silt, which also serves as a health indicator, is recorded as a percentage of the entire sample, for too much silt in the creek indicates high rates of erosion and siltation. The Sediments study shares its data with Biological Assessment and Long Mapping for further analysis of the creek.