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1、西安理工大学硕士学位论文(4)Simulatedtheinterceptionoffourdifferenttreeage(35-year,25-year,10-year,5-year)arborvitaewithstatisticalempiricalmodelandthebestmodelformwasdifferent.Thebestsimulativemodelformwaspowerform，exponentialform,powerformandquadraticpolynomialformseparately.Simul
2、ated10timesinterceptionofYangjiagoulocustand4timesinterceptionofChangqingshanlocust,thebestsimulativemodelformwaspowerform,andthecorrelationcoefficientswas0.9452and0.9988.Thebestsimulativemodelformofalfalfawaspowerform,thecorrelationcoefficientwas0.9356.Theamountofoilpi
3、neinterceptionandalmondinterceptionwasless,usinglinearformtosimulate.(5)Thesoilevaporationtrendofevergreenconiferousforest,deciduousbroad-leavedforestandgrasslandwassimilaringrowingseason.ThesoilevaporationwaslowinlateMaytomidJune,midJulytomidAugustandearlySeptembertoea
4、rlyOctober.Thesoilevaporationofgrasslandwasgreaterthanforestinwholegrowingseason,5-yeararborvitae>10-yearoilpine>Changqingshanlocust>35-yeararborvitae>25-yeararborvitae>10-yearoilpine>almond>35-yearoilpine>Yangjiagoulocust.Afterraining,observedsoilevaporationandsurfaces
5、oilmoisturecontinually.Surfacesoilmoisturedecreasedrapidly.After11daysor13days,thedeficitofsoilmoisturewasdifferent.Thedeficitof5-yeararborvitaewasgreaterandthedeficitwas4.7mm.Thesurfacesoilwaterofothersamplingsiteswasclosedtothewiltingpoint.(6)Soilevaporationwaslessrel
6、evantwithsinglemeteorologicalfactors.UsingP-MequationcalculatedthereferencecropevapotranspirationET0,andusingET0representedtheinfluenceofmeteorological.Therelationshipofsoilevaporationandsurfacesoilwaterwaslinear.Thecorrelationcoefficientofgrasslandandevergreenconiferou
7、sforestwasgreater.Consideredtheinfluenceofmeteorologicalfactorsandsurfacesoilwatercontent,empiricalsoilevaporationmodelwasestablished.Theequationformwas:E=()aq+×bETv0(7)AnalyzedthevariationoftotalgreenwaterwiththerunoffcoefficientinNanxiaohegoubasin.Thetrendwasdecreasef
8、rom60sto90s,andtheaverageannualgreenwaterin90swas461.3mm，occupied88.78%ofprecipitation.Theaverageannualgreenwa
