1. Bell Ringer: Feb. 4 th What are ways we can conserve water? Update your ToC! 2-3-1417Groundwater Notes 2-4-1418Using Water Wisely Notes 2-4-1419Using Water Chart Handout 2-4-1420Hydrology Study Guide

2. Water Conservation

3. Using Water Wisely Chapter 11 section 4 S6E5.i Describe methods for conserving natural resources such as water, soil, and air.

4. You will be able to ……………….………… – Identify two forms of water pollution – Describe two ways that wastewater can be treated. – Describe how water is used and how water can be conserved in industry, in agriculture, and at home.

5. While hiking, you realize your canteen is almost empty. Why should you not fill the canteen with water from the nearby stream? Even though the water may look clean, it might contain pollutants or bacteria.

6. Water Pollution What is pollution? Where does the waste come from? The introduction of harmful substances into the environment. Cities, factories, and farms

7. Point-source pollution It comes from a specific site. It can be controlled because its source can be identified.

8. Nonpoint-source pollution It comes from many sources. Reaches bodies of water by runoff. Examples: street gutter, fertilizers, eroded soils, salts from irrigation. Hardest to Control

9. Health of a Water System Properties of water influenced by water quality? Dissolved Oxygen (DO) – this is the oxygen that is dissolved in water. – Levels below 4.0 mg/L in can cause stress and death for organisms in the water. – Sewage, fertilizer runoff, and animal waste can decrease DO levels. – thermal pollution (increase in water temperature) causes a decrease in DO levels. Ex: nuclear power plants – Cold water holds more oxygen than warm water

10. Nitrates are naturally occurring compounds of nitrogen and oxygen. – Small amounts normal, elevated harmful – Lower DO levels – Examples: animal wastes or fertilizers that seep into groundwater.

11. Alkalinity refers to the water’s ability to neutralize acid. -too much acid (ph below 6.0), harmful to organisms living in water.

12. Cleaning polluted water Sewage treatment plant – A facility that cleans the wasted materials found in water that comes from sewers or drains. Septic Tank – A large underground tank that cleans the wastewater from a household by separating solid wastes from liquids. – Bacteria breaks down the solid waste.

15. Where is water used? Home Average 100 gal per day Industry 19% Agriculture

17. Ways to Conserve water >>>>>>Only use water that is needed<<<<<< Industry: recycle water Agriculture: drip irrigation system Household: Low-flow shower heads and low-flush toilets, time your showers, only wash dishes and clothes when there is a full load.