In an aquatic environment, sediment can either be suspended (floating in the water column) or bedded (settled on the bottom of a body of water). Sediment is a naturally occurring element in many bodies of water, though it can be influenced by anthropogenic factors 8. However, during a flood or other high flow event, even large rocks can be classified as sediment as they are carried downstream 6. These particulates are typically small, with clay defined as particles less than 0.00195 mm in diameter, and coarse sand reaching up only to 1.5 mm in diameter 5. Most mineral sediment comes from erosion and weathering, while organic sediment is typically detritus and decomposing material such as algae 4. clay, silt and sand), decomposing organic substances and inorganic biogenic material are also considered sediment 1. While the term is often used to indicate soil-based, mineral matter (e.g. Sediment refers to the conglomerate of materials, organic and inorganic, that can be carried away by water, wind or ice 3.
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