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Using Water Wisely

Using Water Wisely

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Using Water Wisely

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  1. Using Water Wisely Beth Roland Eighth Grade Science

  2. Water,Water,Everywhere and not a drop to drink! • Of the Earth’s Hydrosphere, only 3% of the Earth’s water is fresh water • Of the 3% of fresh water nearly 75% of that water is frozen in icebergs • It is of utmost importance that we protect our fresh water to help preserve and protect the water for future generations

  3. Sources of Pollution • Point-source Pollution • Pollution that is released from a single, verifiable source • Is the easiest to identify as the pollution can be traced to a single source Example: discharge pipe from a furniture plant

  4. Nonpoint-source Pollution • Nonpoint-source pollution comes from many sources • This type of pollution is harder to control as it doesn’t come from one source • Examples: agricultural run-off of pesticides, land clearing, urban run-off

  5. Measuring Water’s Health • Dissolved Oxygen (DO)- oxygen is necessary for organisms to survive (both land AND aquatic) • Critical level is 4.0 milligrams/Liter of water • Sewage, fertilizer, and animal waste decrease DO

  6. Temperature Changes • Temperature greatly affects the Dissolved Oxygen (DO) levels • Cold water can hold more Oxygen (O2) • Warm water can hold less Oxygen (O2) Environmental Impact of Industry- Nuclear power plants use surface water as a cooling agent and this increases temperature of the surrounding water= West Indian Manatee

  7. Nitrates Levels • Nitrates are compounds that contain the element Nitrogen and Oxygen are harmful to living organisms and lower the Dissolved Oxygen (DO) levels • Animal wastes and fertilizers are high in Nitrates

  8. Sources of Nitrates

  9. pH Levels • The measure of pH compares the acid/base balance of substances. • The range of pH is 1 (a strong acid) to 14 (a strong base) • In order to sustain life, the necessary pH range is from 6.5 – 8.5 • A pH of 7 is considered neutral

  10. Turbidity…What? • Turbidity is a measure of the amount of particles suspended in the water. If there is a high turbidity (lots of suspended particles) sun light cannot penetrate through and aquatic plants cannot photosynthesize • Silt, clay, wastewater discharge, and high concentrations of phytoplankton increase turbidity

  11. Measuring Turbidity