How DoesWaterUse AfectourWaterTreatment?

Transkript

1 In1924,thenewlybuiltDavidL.TippinWaterfacilityprovidedpotablewaterfor51,000 peopleinthecityoftampa.asthepopulationgrew,sodidthedemandandtheneedto expandthedistributionsystem togetwatertoalareasoftampa.today,thecityoftampa servesover600,000peoplecoveringanareaofalmost171squaremiles.it snotsurprisingthat withthesheersizeofourcitythatthedavidl.tippinwatertreatmentfacilityisthelargest surfacewatertreatmentplantinfloridaservingmorethan90percentofthewaterthatisconsumed bytampacitizens.aftertreatment,thefinishedwaterispumpedthrough2,300milesofpipeto thosesamecitizens. WhileTampausesanaverageof77miliongalonsawateraday,wateruseinour Cityfluctuatesfrom seasontoseason,from daytodayandevenfrom hourtohour. Forexample,intherainyseasonwedon tdependonoursprinklersasmuchto irrigateouryards.thisalowsthecitytoholdontothewaterfortimeswhenwewil needitmore,likeinthedryseason.incoolerweather,ourlargeofficebuildingsand hotelsuselesswaterthaninwarmermonthstooperatetheircoolingtowers.on weekends,mostofourindustriallocationsthatusewatertoprocessorproduce productsareclosed.lookingmoreclosely,waterusefluctuatesduringtheday.at night,whenmostofusaresleeping,waterdemandsdecrease.morningshowers andeveninglaundrychores,thedailywateruseinourhomesfluctuate.alofthese seasonalanddailyfluctuationsindemandaremanagedbyusingstoragesites.at thewaterproductionplan,largeundergroundstoragetanks,caledclearwels,are usedtostoretreatedwater.whenthedemandforwaterishigh,thenthewateris pumpedbylargepumpsfrom clearwelsintoaweb-likeundergroundpipingsystem thatcoverstheentireservicearea.whenwaterdemandislow,theplantcontinues toproducemilionsofgalonsofdrinkingwatertorefiltheclearwels.

2 IntheTampa srainyseason MaythruOctober thereusualyismorewateravailableto producedrinkingwaterforthecitythanduringthecooler,driermonths.whenthathappens, surpluswateristreatedtodrinkingwaterqualitythenstoredinthedeepundergroundaquiferto usewhenwatersuppliesarelow.thisstoragemethodiscaledaquiferstorageandrecovery (ASR).Tampa sasrsystem usesaseriesof8welsandiscapableofstoringupto1biliongalons ofwaterundergroundforlateruse. Toreduceourrelianceondrinkingwaterforlandscapeirrigationandsomeindustrialand commercialuses,tampausesreclaimedwaterproducedbythecity swastewatertreatment system.thewateristreatedtoremovesolidsandimpuritiesandthenpumpedintoa undergroundpipingsystem thatisseparatefrom ourdrinkingwaterpipesfordeliverytohomes andbusinesseswherereclaimedwaterisinuse.manyhomesandbusinessesintampause reclaimedwaterratherthandrinkingwaterforirrigation.tampainternationalairportuses reclaimedwaterinplaceofdrinkingwatertocoolitsbuildings.tampa smckaybay Refuse-to-EnergyFacility,usesreclaimedwaterintheprocessofconverting360,00tonsoftrash toelectricalenergyeachyear. DuringperiodswhenTampa sdemandforwaterexceedourwatersupplies,tampapurchases waterfrom TampaBayWater,theregionalwaterwholesaleprovider,toensurethatal householdsandbusinessesintampagetthewatertheyneed.whenwaterispurchasedfrom TampaBayWater,thedifferencebetweenlocalproductioncostsandthepricepaidforthewater issharedbyeveryoneusingcityoftampawaterbyaddinganadditionalcharge,thetampabay WaterPass-ThroughCharge,totheirmonthlybils.Duringextremedryperiods,whenbothlocal andregionalwatersuppliescanrunlow,tampageneralyaskspeopletoreducetheiroutdoor irrigationandtolookforotherwaystotemporarilyreducetheirwateruse.

3 UsetheCityofTampaAverageDailyDemandgraphsprovidedtodiscussthe questionsbelow.notethatthebarsonthechartsshow theaveragedailywateruse,by dayoftheweek,fortampainmiliongalonsperday.thedropsatthetopofthechart show theaveragedailyrainfal,bydayoftheweek,fortampaininches. 1.Whatfactororfactorsdoyouthinkaccountforthewateruselevelsshownin blackonthecharts? 2.DoesrainfalappeartoaffectwateruseinTampa?Ifso,how? 3.Whatwaterusesdoyouthinkaccountforadropinaveragedailywaterusein December2014andJanuary2015? Goonlinetohttp:// much wateryourfamilyuseseachdayathome. 1.How doesyourfamily sannualwaterusecomparetotheaveragehouseshown inthereport? 2.TheaverageTampahouseholduses72,817galonsofwaterayear.How does yourfamilycompare? 3.WhataresomeofthefactorsthatmaycontributetoTampa saverageannual householdusebeingmorethanthenationalaverageshowninthereport? 4.Wheredoesyourfamilyusethemostwater? ExtraCredit Gothehttp:// Chalenge.Completethechalengetoseehow accurateyourestimatewasforthedaily wateruseatyourhome.

4 City of Tampa Average Daily Demand: November January Watering days shown in orange 2 MGD Daily Rainfall Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat 5 Nov'14 Dec'14 Jan '15 Used MBBooster Station Gage, August

5 City of Tampa Average Daily Demand: May-July Watering days shown in orange MGD Daily Rainfall Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat May'15 June'15 July'15 Used MBBooster Station Gage, August