农业水资源

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1、SymposiumonEnvironmentalChangesandEfficientUseofAgriculturalResources,(Oct.21~22,2021,Shijiazhuang,China)AgriculturalwatersavingstudiesforasustainablewatermanagementintheNorthChinaPlain(NCP)ChangmingLiuAgriculturalResourcesResearchCenter,CASKeyLab,IGSNRR,CAS,WaterScienceColle

2、geBNUOutlineMajorfeaturesofNCP’swaterresourcesMainWaterissues:rapidsocial-economicdevelopmentandclimatechangeAgriculturalwater-saving:thehighlightsDiscussionsofsomeideasofwater-savingAgriculturalwater-saving:Policy&CountermeasuresMajorfeaturesofNCP’swaterresourcesAnnualprecip

3、itationinmmAverageannualprecipitationfrom1951to2021TheNCP:inthesemi-arid&semi-humidregion.Annualprecipitationaround350and800mmThemonsoonseason(JunetoSeptember)contributesmorethan80%ofannualrainfallMajorfeaturesofNCP’swaterresourcesPotentialevapotrnspirationinmmAnnualPotential

4、evapotrnspirationintheNCPishighvariesbetween796and1257mmresultinginmuchwaterlossAverageannualPotentialevapotrnspirationfrom1951to2021MajorfeaturesofNCP’swaterresourcesAridityindexThearidityindexvariesfrom1.0to3.2..It’sintheclimatetransitionzone.MajorfeaturesofChina’swaterreso

5、urcesAnnualevapotraspiratiominmmAverageannualevapotrnspirationfrom1951to2021calculatedbytheBudykohypothesis.MajorfeaturesofChina’swaterresourcesAnnualrunoffinmmSharpdeclineriverflowsintotheseaPerCapitawateramountMajorfeaturesofChina’swaterresourcesWaterConsumptiontoavalaiblew

6、aterresourcesin%inChinaAfterDrShaoYisheng，MinistryofConstructionWateruse/wateravailabilityin%MajorfeaturesofNCP’swaterresourcesSummaryNCPisthemostwatershortageareainChinaaspercapitawater300m3only.Totalwaterwithdrawal:37km3/a(2021)exceedingavailablewaterOverdrawinggroundwaterh

7、asresultedinaquiferwaterdepletionasawatercrisisAgriculturalwateruseabout25.3km3/a(2021),makingupabout68.5%oftotalwithdrawalWater-savingisverycrucialAttribution:Waterstressfromrapiddevelopment:CurrentGDPgrowthisspeedingupincudingNCPregionMainWaterissues:RapiddevelopmentWaterst

8、ressfromincreasedwaterdemand:increasedwaterconsumptionpercapita.Main