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1、Judges'Commentary189Judges'Commentary:TheOutstandingNationalWaterStrategyPapersDavidH.OlwellDept.ofSystemsEngineeringNavalPostgraduateSchoolMonterey,CAProblemStatementFreshwateristhelimitingconstraintfordevelopmentinmuchoftheworld.Buildamathematicalmodelford
2、etermininganeffective,feasible,andcost-efficientwaterstrategyfor2013tomeettheprojectedwaterneedsof[pickonecoimtryfromthelistbelow]in2025,andidentifythebestwaterstrategy.Inparticular,yourmathematicalmodelmustaddressstorageandmovement,de-salinization,andconser
3、vation.Ifpossible,useyourmodeltodiscusstheeconomic,physical,andenvironmentalimplicationsofyourstrategy.Provideanontechnicalpositionpapertogovernmentalleadershipoutliningyourapproach,itsfeasibilityandcosts,andwhyitisthe"bestwaterstrategychoice."Countries:Urüt
4、edStates,China,Russia,Egypt,orSaudiArabiaIntroductionandOverviewThisproblemissimilartooneusedforthe2009HighSchoolMathemat-icalContestinModeling(HiMCM)®.Theproblemwasexpandedforthe2013MathematicalContestinModeling(MCM)®contest.Thejudgesex-pectedmoresophistica
5、tedmodeling,higherresolution,betteranalysis,andfullerinterpretationbytheMCMteams.Thejudgeswerenotdisappointed.Theproblemwasdeliberatelywrittentohaveapotentiallyoverwhelm-ingamountofdetail,andtoforcethestudentteamstodecidewhatsimpli-TheUMAPJournal34(2-3)(2013
6、)189-195.©Copyright2013byCOMAP,Inc.Allrightsreserved.Permissiontomakedigitalorhardcopiesofpartorallofthisworkforpersonalorclassroomuseisgrantedwithoutfeeprovidedthatcopiesarenotmadeordistributedforprofitorcommercialadvantageandthatcopiesbearthisnotice.Abstra
7、ctingwithcreditispermitted,butcopyrightsforcomponentsofthisworkownedbyothersthanCOMAPmustbehonored.Tocopyotherwise,torepublish,topostonservers,ortoredistributetolistsrequirespriorpermissionfromCOMAP.190TheUMAPJournal34.2-3(2013)fyingassumptionscouldbemadesot
8、heproblemwouldbetractableinthetimeallowedyetprovideusefulinsights.Itwasalsowrittensothatstu-dentswithabackgroundinonlylower-divisionmathematicscouldattemptit.Torecognizetheincreasinginternationa
