‘Cuz THAT’S how we roll!. Two big ideas this unit: Water Supply Water Pollution.

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Presentation transcript:

‘Cuz THAT’S how we roll!

Two big ideas this unit: Water Supply Water Pollution

5 Ways to increase water availability Build more dams Use more groundwater Transfer water Desalinate water Conserve water

-Ben Franklin

Drought – the new normal? 2011 – worst 12 month period of drought recorded in Texas history Agriculture - $5 billion lost Wildfires Reservoirs down to 60% of water storage levels More than 900 of the state’s 4700 water supply systems had water restrictions - data from Lone Star Sierran Fall-Winter 2011

Conservation success San Antonio – pumps no more water today than it did 20 years ago, despite the dramatic population increase in its service area in that same period of time! Thanks to conservation! San Antonio reduced its per capita use by more than 70 gallons.

65-70% of water used is wasted in evaporation, leaks and other losses

Power plants use water to condense steam back to water which will be cycled through again

Agriculture

Pivot circles  are very wasteful – only 40% of water reaches plant roots

Water sensors

Water sensor on plant

Drip irrigation

What can you do directly?

Two sides to conservation Equipment Behaviors

Where should we focus our conservation efforts?

Aerating showers and faucets

Water saving toilets or “dual flush”

Make your own!

Watering the landscape

Xeriscaping

What about recycling water? “Grey water reuse”

Use water twice! Water from sink fills toilet tank to then flush toilet.

Even the Alamo uses grey water! Grey water is being used more in: Golf courses Sweeping streets Fighting fires Parks Amenity lakes

Current Texas water reuse 2% New technology cleans water to almost distilled quality Eventually, 10% of water demand will come from reuse in Texas

Tradeoffs! Reuse will divert more water from rivers. Less water downstream for people and wildlife Before: River  home  river After: River  home  land

What about the behaviors?

STUFF! How do the three R’s conserve water?

Check for understanding Why is conservation considered the easiest way to increase the amount of water available for use? What is the name of the wasteful agricultural irrigation system? Name a way to save water in agriculture. Name a way to save water at home. How are YOU responsible for the amount of water used in industry? What is grey water? How will you identify the downstream direction on a map?