nwq2 - NEIGHBORHOOD WATER QUALITY Lesson 2. Pollution and...

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©PROJECT OCEANOGRAPHY 13 NEIGHBORHOOD WATER QUALITY FALL 2000 NEIGHBORHOOD WATER QUALITY Lesson 2. Pollution and Water Quality Keywords: pollutants, water pollution, point source, non-point source, urban pollution, agricultural pollution, atmospheric pollution, smog, nutrient pollution, eutrophication, organic pollution, herbicides, pesticides, chemical pollution, sediment pollution, stormwater runoff, urbanization, algae, phosphate, nitrogen, ion, nitrate, nitrite, ammonia, nitrifying bacteria, proteins, water quality, pH, acid, alkaline, basic, neutral, dissolved oxygen, organic material, temperature, thermal pollution, salinity Pollution Sources Water becomes polluted when foreign substances enter the environment and are transported into the water cycle. These substances, known as pollutants , contaminate the water and are sometimes harmful to people and the environment. Therefore, water pollution is any change in water that is harmful to living organisms. Sources of water pollution are divided into two main categories: point source and non-point source. Point source pollution occurs when a pollutant is discharged at a specific source. In other words, the source of the pollutant can be easily identified. Examples of point-source pollution include a leaking pipe or a holding tank with a hole in it, polluted water leaving a factory, or garbage being dumped into a river. These sources of pollution are easy to identify because the cause of the pollution can be observed. Non-point source pollution is more common, and contributes more pollution to surface water than does point source pollution. This type of pollution is difficult to identify and may come from pesticides, fertilizers, or automobile fluids washed off the ground by a storm. Non-point source pollution comes from three main areas: urban-industrial, agricultural, and atmospheric sources. Urban pollution comes from the cities, where many people live together on a small amount of land. This type of pollution results from the things we do around our homes and places of work. Agricultural pollution comes from rural areas where fewer people live. This type of pollution results from runoff from farmland, and consists of pesticides, fertilizer, and eroded soil. Atmospheric pollution comes from small particles that are carried in the air. A good example of atmospheric pollution is smog . These pollutants are carried around the world by winds, and reach the ground through rain. Acid rain is rain that has a high concentration of atmospheric pollutants.
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©PROJECT OCEANOGRAPHY 14 NEIGHBORHOOD WATER QUALITY FALL 2000 NEIGHBORHOOD WATER QUALITY Types of Pollution Nutrients Plants living in the water require a sufficient supply of nutrients to grow and mature properly. The most common nutrients found in our waters are nitrogen, phosphorous, and carbon. However, large amounts of nutrients
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This note was uploaded on 07/31/2011 for the course OCB 6050 taught by Professor Staff during the Spring '11 term at University of South Florida - Tampa.

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nwq2 - NEIGHBORHOOD WATER QUALITY Lesson 2. Pollution and...

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