海水淡化与饮用水Word文档下载推荐.docx
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海水淡化与饮用水Word文档下载推荐.docx
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waterwillsoonbecomeaserioussocialcrisis.Aftertheoilcrisisofthenextwatercrisisis"
aseriouscase,solvethewaterhasarousedworldwideattention.Asearlyas1977,theUnitedNationstoconvenetheGeneralAssemblyofthewaterontotheworldthewarningwasissued.
Nearly30years,bothdevelopinganddevelopedcountriestoaddressthewaterissuehasbecometoensurethatpeopleliveanormallifeandsustainableeconomicdevelopmentanimportanttask.Tosolvethetaskofdrinkingwatertherearethree,thefirsthavingwatertodrink,tosolvetheproblemofwatershortage,andthesecondcouldnothavecontaminateddrinkingwater,addresswaterpollutionproblems,thethirdtodrinkahealthyeffectonthehumanbodyofwatertoaddressthedrinkingactivatedtodealwiththeissueofwater.Thesethreeaspectsofdrinkingwatermission,althoughofdifferentpriorities,butthehealthoftheguarantor,istheneedtoaddressco-ordinatethedevelopment.Thisarticlelinksthetasktosolvethethreeaspectsofdrinkingwatertodiscussthedevelopmentofourcountryuseanddesalinationofseawatersotheproblemofdrinkingwaterandrecommendations.
2"
Water"
istheeternalsubjectofhuman
Ontheproblemofwatershortage,thereisarecognizedinternationalstandard,isgenerallybelievedthatthecountry'
spercapitashareofrenewablefreshwaterannualvolumeof1700tonsinthefollowing,asadrycountry,1,000tonsinthefollowingcountriesasaseriouswatershortage.Atpresent,theworld'
spopulationaccountedfor40%ofseverewatershortageinmorethan80countries.ThemostseriouswatershortageintheMiddleEast.SaudiArabiaofwaterpercapitaperyearisonly249tons,95tonsofKuwait,Israel,300tons,936tonsofEgypt.Water
shortagenotonlyaffectsacountry'
seconomicdevelopmentandpeople'
snormallife,butalsocausedbyinter-Stateconflicts.UnitedNationspanelonglobalwarming,thePresident,thefamousmeteorologistJohn.HeapLordthatwithglobalwarmingledtoanumberofopposingcountriestocompetefordwindlingwaterresourcesinconflict,theoutbreakofthe21stcenturywillbewaterwars.199347thsessionoftheGeneralAssemblydecidedonMarch22eachyearas"
WorldWaterDay"
callingonothercountriesontheglobalprevalenceoftheproblemofwatershortageandwaterpollutioncausedbyvigilantandcarryoutcorrespondingactivitiestoraisepublicawarenessoffloodingisverycorrect.
China'
swatershortageisaseriouscountry.Althoughwaterresourcesare2800billionm3,rankssixthintheworld,thepercapitaresourcesare2220m3.However,theinclusionoftheUnitedNationstoChina'
swater-poorcountries,becauseofourspatialandtemporaldistributionofwaterresourcesextremelyuneven,thetimefocusonwaterresources,floodseasoneveryyearfor4months,waterin2/3isdifficulttomakeuseoftheflood.Theregionaldistributionofwaterresourcesdonotmatch,theYellowRiver,HuaiheRiver,HaiheRiverBasin,thecountry'
stotallandareaof13.4%,accountingfor39percentofarableland,populationaccountsfor35%,GDP(grossdomesticproduct)accountedfor32%ofthewaterresourcesaccountforonly7.7%percapitaofabout500m3.Inrecentyears,theareanorthofconsecutivedroughtintheYangtzeRiver,hasbeenusedinTianjinlastyearPanjiakoureservoirdeadstorage,butalsothebeginningoftheYellowRivertoTianjinurgentemergencywaterdiversionproject.Weihailastyeartodealwith"
dry"
thedevelopmentofmorethan1m3ofwaterafixedwaterchargeincreases40-foldmeasures.Inaddition,waterpollution,China'
smorerainintheSouthalsoexistsinvaryingdegreesofwaterpollution,someareasalsoveryserious.Therefore,inthefaceof"
aserioussituation,itisnecessarytoensurethatpeopleliveanormallifeandthesustainabledevelopmentofthenationaleconomy,tosolvetheproblemofwatershortageandalsoalong-termstrategictask.
3Humanbeingsbeabletoovercomethe"
water"
crisis
Aslongaspeopleofallcountriesinaddressingtheissueofwaterways,andactivelyincreaseincomeandreduceexpenditure,andactivelycarryouttheconstructionofwaterconservancyprojects,thedevelopmentofagricultureandotherwater-savingdripirrigationprojectstopoorareasofdevelopedcountriestolendahelpinghand,wewillcertainlybeableto
overcometheworld"
watershortage"
crisis.TheMiddleEasthaslongbeena"
areas.Theyusethetechnologydevelopedwateruseanddesalination,dripirrigationprojectsonagriculturaldevelopmenttoalleviateshortagesoffreshwatercrisisinthecountryplayedanimportantuse.Theirexperienceisworthyofourattention.
Issuesinourcountrybothinthewatermorethanwater(floods)ofthetrouble,andlittlewater(drought)concerns.Wemusthavealong-termfloodprotectionprogram,adefeatoftheopensourceofwater-savingprogramsofdrought,astrongprogramtopreventwaterpollution,andimplementeffective,wecanovercomethe"
problems.
Atpresent,wehaveovercomethe"
issues,awarenessisnotuniform,thepaceisalsoinconsistent,werenoteffective,implement,andeventheexistenceofcreating"
watershortage"
aseriousphenomenon.Forexample,industrialandagriculturalproductioninourdailylifeandthepeoplewastealotofwater,seriousneglectofexpenditure;
moreimportantinopenwater,buttheuseofrainwater,theuseofurbansewage,especiallyfornottakingwaterdonotpayenoughattentiontonotpayenoughattentiontotheuseofrivers,lakes,soilandwaterconservation,donotattachimportancetothepreventionofwaterpollution,sothatthecountry'
swatersourcesoffundsandthesituationisignored,think.Onitscauses,mainlythelackofawarenessofwaterresources,thelackofasenseofcrisisofwaterresources,lackofawarenessoftheecologicalenvironmentofwaterandsoilprotection,therefore,resultinginthedestructionofvegetation,soilerosion,rivers,lakes,groundwaterpollutionaserioussituation.
Theideaistoguideaction.Chinashouldtakeadvantageoftheannual"
tocarryouttheawarenessofwaterresources,waterresources,asenseofurgencytoprotecttheecologicalenvironmentofwaterandsoilawarenesscampaignstoraisepublicawarenessoftheflooding.Inparticular,sothatourcadresatalllevelsuptofloodalertisveryimportant.Weareasocialistcountry,fromthetheoryismostconcernedaboutsustainablehumandevelopmentcountries,wehavetheissueofsustainableuseofwaterresources,effortsshouldbemadeanexampletotheworld.
4Thedevelopmentofdesalinationofseawateruseandthesignificanceofandmeans
Morethan97%ofEarth'
swaterisdifficulttodirecthumanuseofwater.Thishugebodyofwatercontainswaterinexhaustiblevolumeoffreshwaterresourcesandotherwealthofmaterialresources.Atpresent,landinthefaceofhumanandmaterialresourcesoffreshwater
scarcityaconstantthreat,thedevelopmentandutilizationaccountedfor96.5%offreshwaterresourcesandaccountingfor3.5%ofavarietyofrichmineralresourcesistheinevitabletrendofdevelopment.ForthedevelopmentofChina'
swateruse,istosolvewatershortageproblems,developingthenationaleconomyandbuildingagreatmaritimepowerofthestrategicsignificanceofstrategicmeasures.
However,thedevelopmentandutilizationofseawatertoeasethewatershortagesituationinChina'
sstrategicsignificance,inourcountryhasnotyetattractedsufficientattention.Thedevelopmentandutilizationofwaterresourceshaveadirectuseanddesalinationofseawateruse.Thedirectuseofseawateralottoeasethewatershortageincoastalindustrialcityplaysanimportantrole.Accordingtostatistics,thecoastalcityofwatermorethan80%ofthetotalindustrialwater,industrialwaterandmorethan80%oftheindustrialcoolingwater.Atpresent,thedevelopedcoastalcitiesintheelectricpower,metallurgical,chemical,petroleum,coal,buildingmaterials,foodindustry,todowatercoolingwaterhasreached90%.China'
sDalian,Qingdao,Tianjin,Shanghaiandothercoastalcitieshavealsostartedtheuseofseawaterforcooling,washing,printinganddyeing,chemicalsalt,butalsofarlessthandevelopedcountries.Theuseofseawaterforflushing,theHongKongSARofChina'
snearly40-yearhistory,andChina'
scoastalcities,watershortages,thereisnotacitytouseseawaterforflushing.
Thedevelopmentofdesalinationuseabroadsoon.AccordingtotheInternationalDesalinationAssociation1998surveystatistics,theworld'
s100m3/dofdesalinationdeviceformorethanatotalof12,451units,makingthetotalamountofwaterhasreached22.735millionm3/d.Thanintheprevioussurveycyclestatistics,thenumberincreasedby39%,makingthetotalincreaseof64%water.Inparticular,haveexpandedrapidlyinsomecountriesintheMiddleEast.ItisreportedthatSaudiArabia'
s60desalinationonalargescaleindustriesdevelopment,andsetupadesalinationCorporation,hasoverallresponsibilityforprojectconstructionandmanagementofdesalination.Theyhaveestablishedtheworld'
s25large-scaledesalinationplant,theconstructionofadesalinationwatersupplyworld'
s
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