1. Chapter 13 Review

2. Water Cycle 3% freshwater, but.003% drinkable (glaciers) Transpiration vs. Evaporation Surface Runoff OR Percolation (underground)

3. Aquifers and Water Uses Rain  Percolation  Porous Rocks  Aquifer – Aquifer gets new water = natural recharge – Water mining (like oil) – Too much water mining = over-drafting Uses: Domestic (drinking), Agricultural (farms) and Industrial (factories) – Developed = industrial, Developing = agricultural

4. Dams and Water Treatment Dams = block water flow (heart attack) Chlorination, Sedimentation, Desalinization – Salt water  Fresh water (expensive) Reclaimed water = recycled water (cheap, nutrient-rich)

5. For Your Math Problems… Include: To get m 3 : multiply rainfall by area of facility Include percentages on ARROWS Pre-Treatment Facility (include area in m 2 ) Treatment (include cost in $/m 3 ) Amount of Rainfall (in m) Recharged in Aquifer Irrigated in Soil

6. Water Quality Turbidity (clarity), temp, pH, dissolved oxygen Pollutants from one source (point) or mulitple (non-point) Pesticides and biomagnification (food chain) Lakes and eutrophication (too many nutrients)