let’s go! please go get your interactive notebook! please get out your permission slip and $5 to...
TRANSCRIPT
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Let’s go!Please go get your interactive notebook!
Please get out your permission slip and $5 to turn in.
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Which way is the water running?
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Does being downstream matter?
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February 16
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*Houston Water sources:Lake Livingston (806 MGD)
Lake Conroe (60 MGD)
Lake Houston (150 MGD)
Evangeline aquifer
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1. Screening
2. Coagulation withalum; chlorine treatment
3. Mixing
4.settling tank – flocs sink to bottom
5. Filtration
6. disinfection with chlorine/ fluoride added
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Does being downstream matter?
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How can we meet water needs?ConservationUse more surface water (build more dams)Use aquifers (groundwater)Transfer water from other areasDesalinate ocean water
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Consequences of using our ground waterOverdraft – taking more water OUT of an
aquifer than is recharging IN to the aquifer
(What would happen to your bank account if you did this?)
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February 16
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*Water has mass and fills an aquifer through a recharge zone
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*Subsidence – sinking of land due to aquifer overdraft
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Brownwood subdivision Baytown
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Brownwood 1953
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Brownwood 1978
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Baytown Nature Center today
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Houston is switching to just surface water to
protect the city from further subsidence.
*Overdraft – taking more water OUT of an aquifer than is recharging IN to the aquifer
*Overdraft leads to subsidence
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*Texas Aquifers in trouble!Evangeline – Houston (overdraft and
subsidence)Ogallala – Pan handle through South Dakota
(overdraft by farmers)Edwards – Austin and Hill Country (overdraft
from cities and ranchers)
Label these on your map!
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Check for understandingWhat clues on a map will show which
direction is downstream?How are an aquifer and a recharge zone
related?How are a watershed and a river related?How are subsidence and overdraft related?Why does it matter that our drinking water
supplies are downstream of Dallas?Describe the tradeoffs between using surface
water and using ground water.
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Issue Analysis ProjectProject purpose: To analyze one
aspect of our field trip to describe the challenges and possible solutions for living sustainably in Houston
Due March