sediment - small particles of dirt, rock, and sand suspended in water, weathering - the chemical and physical processes that break down rock at Earth's surface, erosion - wind or water moving weathered rock and soil from one place to another, runoff - water running/draining off the land into a water system, tributaries - smaller streams and rivers that flow into a main river, flood plain - the flat, wide area of land along a river, estuary - a body of water where salt and fresh water mix, brackish - water that is mix of fresh and saltwater, wetland - an area of land that is covered with a shallow layer of water during some or all of the year, watershed - an area of land that drains into a body of water or water system, divide - a ridge of land that separates one watershed from another, algae - a plant-like organism that blooms in spring and summer, point source pollution - pollutants that you know their source, water quality monitoring - water samples analyzing biological/chemical composition , nutrients - food for plants and animals; they can be bad in mass quantities, nonpoint source pollution - pollutants that you don't know their source,

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