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Sample text

In addition,scientists,policy andmanagement decisionmakersandthepublicwill haveto becomecollaborators in projectsover a rangeof scales. As first stepstowardimplementingthis vision,the authorsrecommendthat attentionbe placedon the following areas: 1. Research a) A concertedeffortis neededto improvingthe qualityof predictions Eden and Lawford 39 ableto watermanagers. The focusof thiseffort shouldbe improvedseasonal predictionsof watercyclevariabilityat all scales. b) Betterintegrationof observation campaigns with field studies,acrossdisciplinesis needed,alongwith institutionalas well as scientificinnovations in managingdatafrom multiplesources for greateraccess.

The World• Water2000-2001,BiennialReporton FreshwaterResources, Island Press,2000. G. Bums, Elizabeth L. Chalecki, Michael Cohen,Katherine Kao Cushing,Amar S. Mann,RachelReyes,GaryH. Wolff,ArleneK. Wong,TheWorld• Water2002-2003, BiennialReporton FreshwaterResources,IslandPress,2002. , ElizabethL. Chaleckiand Arlene Wong, MeasuringWaterWell Being: WaterIndicatorsandIndices,chapter4 in The World• Water2002-2003. , Gary Wolff, ElizabethL ChaleckiandRachelReyes,The New Economy of Water: the risks andbenefitsof globalizationand privatizationof freshwater,Pacific Institutefor Studiesin Development,Environment,andSecurity,2002.

Thesetechniquesare very usefulin communicatinginformationto policy makers,althoughthere are significantchallengesin trying to represent such complex processesby a single number [Arnell, 1999]. In addition,morethanone-thirdof the peoplein the world'spoorestcountriesalreadyface medium-highto high water stress(ratio between20 and40%). Many of thesecountriesare locatedin add and semi-add regionsof Africa andAsia. Anotherindex commonlyusedinternationallyis per capitaAWR. However,if it is below 1,000m3,lackof waterbeginsto impairqualityof life, andbelow500 m3, "water availability is a primary constraintto life" [Falkenmark and Lindh, 1976].

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