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1、thejourneyofawaterdrop作文Theheavenandearththisskill,itseemsthatonlythemythicalstorynJourneytotheWestintheMonkeyKingwillhave.Canwateralsodoit?Yes,itcanreallydoit.Therealstartingpointofthejourneyofasmalldropofwaterisfromevaporation,thesunwithasmalldropofwaterfloatingintotheatmosphere,tothefirststopofth
2、ejourneyofasmalldropofwater-toachievetherealuptoheaven.Thisisthemostimportantpartofthewatercycle.Thewatervaporproducedbyevaporationenterstheatmosphereandmoveswithatmosphericactivity.Themostimportantpartofthewatervaporintheatmospherecomesfromtheoceans,andpartofitalsocomesfromevaporationfromthesurface
3、softhecontinents.Todayoursmallwaterdroplets,fromthearmsofthemotheroftheocean,whenthesunwarmlydressestheseliquidspritesintogaseouscherubstotheatmosphere,withthewinduncleledfromtheseaovertheplaytothelandovertheprocess,inthewatercycleiscalledwatervaportransport,butitisoneofthemostactivelinksinthewaterc
4、ycle.Thesecondstopofthejourneyofsmalldropsofwaterisachievedthroughprecipitation.Afterplayinginthesky,thesmalldropsofwaterchangebacktotheiroriginalspriteoutfits,andwiththegreetingsfromtheskytotheearth,theyfloattothethirdstopofthejourneyofsmalldropsofwater-theground,withafeelingofsolidity.Thewaythisjo
5、urneyisdoneisthroughrunoff.Runoffisthedifferencebetweentheamountofprecipitationandevaporationinaregion(watershed).Themulti-yearaverageoceanicwaterbalanceequationis:evaporation=precipitation-runoff;themulti-yearaveragelandwaterbalanceequationis:precipitation=runoff+evaporation.However,thegeographicdi
6、stributionofprecipitationandevaporationisnotuniformforeitheroceansorland,andthisdifferenceismostevidentatdifferentlatitudes.Thefourthstopofthedropletjourney,let,salsofeelthesmalldropofwaterintotheground1.Infact,wearetalkingaboutinfiltrationandundergroundrunoff,whichreferstotheprocessofwaterinfiltrat
7、ionthroughthegroundintothesoil.Thephysicalprocessofwaterinthesoilundertheactionofmolecularforces,capillarygravityandgravity,isanimportantpartoftheformationofrunoff.Experiencedtheheavenandearthofthesmalldropsofwaterisreallyabithomesick,inthehappyriverinthebigriver,orindifferentundergroundriverwalk,andfinallyreturnedtotheirhomesea.Many,manysmalldropsofwater,intheirhappyjourney,sothatthewaterisfullofspirituality,sothattheworldofwaterisaliveandwell.Wecallthetravelprocessofsmalldropsofwaterthewatercycle.
