微润灌条件下微润袋入渗特性试验研究

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1、AbstractMicroirrigationisanewtypeofhighefficientirrigationtechnology,itusesemipermeablemembraneasirrigationwaterpipe，irrigationwaterslowlyreleasedintothecroprootzonesoilbytheburiedwayanduptakedbycrop．Duetomicroirrigationisonekindofnewwatersavingirrigationtechno

2、logy,thecurrentdomesticandforeignresearchesonmicroembellishirrigationisrelativelyless．Onthebasisofsystemicconclusionandstudytheresearchachievementsindomesticandforeignrelatedtomicroirrigation，thispaperhasconductedsomepreliminaryexperimentresearchaboutmicroreser

3、voir．Themainresearchcontentisdividedintothefollowingseveralaspects：Toanalysiswaterpercolatingcapacitychangeofmicroreservoirunderdifferentwaterheadthroughtheindoortest，andanalyzethechangeofwaterpercolatingcapacitywithmicroreservoir．Throughtheindoortestanalysisth

4、edevelopmentofthemoistsoilbodyandtheshapeofwettingbodyintheconditionsofdifferentmicropipeburieddepthanddifferentsoil，andanalysisthechangesofthesizeofthewettingfrontandsoilmoisturecontentinalldirections．BasedonthelearningandfamiliarHYDRUS一2Dsoftware，usingthesoft

5、waretonumericalsimulatethesoilwaterinfiltrationatconditionofmicroembellishirrigation，andcomparingthesimulatedvaluesandmeasuredvaluesWeCangetthefollowingmainconclusionsthroughanalysis：1、Infiltrationwaterandheadintoalinearrelationshipbetweenmicroreservoir,withthe

6、headsli曲tlydampbagperunittimeincreased，infiltrationvolumeincreased．Microrunirrigationandotherpressureirrigation，waterheadsizeisthemaindrivingforceofflow．Thus，pressureeffectsonsoilwaterinfiltrationinthefollowingtwoaspects：oneistoincreasethepressureheadcanleadtoi

7、nfiltrationinterfacepressurepotentialincreases，theinfiltrationrateincreases；thetwoisthesoilinfiltrationinterfacepressureincreaseswiththeincreaseofpressurehead，infiltrationofsoilstructureinterfacechange，leadtothesaturatedhydraulicconductivitychanges．2、Microreser

8、voircumulativeinfiltrationwaterandtimeintoalinearrelationship，withthetimeincreasing，thecumulativeinfiltrationvolumeofsinglemicroembellishbagalsoincreases．Microreservoirunitt