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1、AnalysisofWaterChemistryUrbanStreamRestorationProjectBy:BobSmith&ShellyAliciaOutlineWaterChemistryBackgroundChemistryinUrbanStreamsMethods2003ResultsComparisonto2002ConclusionsOutlineWaterChemistryBackgroundChemistryinUrbanStreamsMethods2003ResultsComparisonto2002ConclusionsTemperatureMostaq
2、uaticorganismsarecold-bloodedandhaveanidealtemperaturerange,specifictotheorganism:Diatoms15-25degreesCGreenalgae25-35degreesCBluegreens30-40degreesCSalmonids–coldwaterfishTemperature,continuedAffectsdevelopmentofinvertebrates,metabolismoforganismsAffectsdissolvedoxygen(warmwaterholdslessoxyg
3、en)Warmwatermakessomesubstancesmoretoxic(cyanide,phenol,xylene,zinc)and,ifcombinedwithlowDO,theybecomeevenmoretoxicDissolvedOxygenOxygenthatisdissolvedinwaterDOincreaseswithcoolerwaterandmixingofwaterthroughriffles,storms,windNutrientloadingcanleadtoalgalbloomswhichresultindecreasedDO4-5ppmD
4、Oistheminimumthatwillsupportlarge,diversefishpopulations.IdealDOis9ppm.Below3ppm,allfishdie.DissolvedOxygen,continuedDissolvedoxygencanalsobeexpressedas%saturation80-124%=excellent60-79%=ok<60%=poorConductivityMeasurestheabilityofwatertocarryanelectriccurrentMeasurestheionssuchasNa+,Cl-inthe
5、waterDifferencesinconductivityareusuallyduetotheconcentrationofchargedionsinsolution(andioniccomposition,temp.)ReportedasmicrosiemenspercmpHpHmeasuresthedegreeofacidityoralkalinityofthewater(eachnumberisa10-folddifference)0-6=acid;7=neutral;8-14=baseIdealforfish=6.5–8.2Idealforalgae=7.5–8.4A
6、cidwatersmaketoxicchemicals(Al,Pb,Hg)moretoxicthannormal,andaltertrophicstructure(fewplants,algae)TurbidityMeasuresthecloudinessofthewaterTurbiditycausedbyplankton,chemicals,silt,etc.Mostcommoncausesofexcessturbidityareplanktonandsoilerosion(duetologging,mining,farming,construction)Turbidity
7、,continuedExcessTurbiditycanbeaproblem:Lightcan’tpenetratethroughthewater–photosynthesismaybereducedorevenstop–algaecandieTurbiditycancloggillsoffishandshellfish–canbefatalFishcannotseetofindfood,butcanhidebetterfrompredatorsPhosphorus(Reactive)Isn
