农业水资源培训资料(英文版).ppt

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1、SymposiumonEnvironmentalChangesandEfficientUseofAgriculturalResources,(Oct.21~22,2011,Shijiazhuang,China)AgriculturalwatersavingstudiesforasustainablewatermanagementintheNorthChinaPlain(NCP)ChangmingLiuAgriculturalResourcesResearchCenter,CASKeyLab,IGSNR

2、R,CAS,WaterScienceCollegeBNUOutlineMajorfeaturesofNCP’swaterresourcesMainWaterissues:rapidsocial-economicdevelopmentandclimatechangeAgriculturalwater-saving:thehighlightsDiscussionsofsomeideasofwater-savingAgriculturalwater-saving:Policy&Countermeasures

3、MajorfeaturesofNCP’swaterresourcesAnnualprecipitationinmmAverageannualprecipitationfrom1951to2008TheNCP:inthesemi-arid&semi-humidregion.Annualprecipitationaround350and800mmThemonsoonseason(JunetoSeptember)contributesmorethan80%ofannualrainfallMajorfeatu

4、resofNCP’swaterresourcesPotentialevapotrnspirationinmmAnnualPotentialevapotrnspirationintheNCPishighvariesbetween796and1257mmresultinginmuchwaterlossAverageannualPotentialevapotrnspirationfrom1951to2008MajorfeaturesofNCP’swaterresourcesAridityindexThear

5、idityindexvariesfrom1.0to3.2..It’sintheclimatetransitionzone.MajorfeaturesofChina’swaterresourcesAnnualevapotraspiratiominmmAverageannualevapotrnspirationfrom1951to2008calculatedbytheBudykohypothesis.MajorfeaturesofChina’swaterresourcesAnnualrunoffinmmS

6、harpdeclineriverflowsintotheseaPerCapitawateramountMajorfeaturesofChina’swaterresourcesWaterConsumptiontoavalaiblewaterresourcesin%inChinaAfterDrShaoYisheng，MinistryofConstructionWateruse/wateravailabilityin%MajorfeaturesofNCP’swaterresourcesSummaryNCPi

7、sthemostwatershortageareainChinaaspercapitawater300m3only.Totalwaterwithdrawal:37km3/a(2009)exceedingavailablewaterOverdrawinggroundwaterhasresultedinaquiferwaterdepletionasawatercrisisAgriculturalwateruseabout25.3km3/a(2009),makingupabout68.5%oftotalwi

8、thdrawalWater-savingisverycrucialAttribution:Waterstressfromrapiddevelopment:CurrentGDPgrowthisspeedingupincudingNCPregionMainWaterissues:RapiddevelopmentWaterstressfromincreasedwaterdemand:increasedwaterconsumptionpercapita.Main