文档介绍：AbstracthispaperfocusesontheprocessofsoilwaterevaporationnotclearofZhongwetXianeshanregioninNingxia,usingfieldexperimentstostudytheeffectsofsoilmoistureevaporationfmmdifferentgravelsoilcoveringmeasuresandgravelsoilmixingratio,themainconclusionsareasfolIows:(ordingtOtheanalysisofthogonalonsoilevaporationthreshold,theresuItshowsthattheImportanttorderoftestfactorsforsoilevaporationthresholdis:rainfall>gravelsoilmixingratio>。overmgthickness,amongwhichrainfallhighlysignificantinfluencefactor,gravelsoilmixingraftothesignificantfactor,gravelsoilcoveringthicknessthesecondaryfacto(2)Accordingtothefiringanalysisandinearfittingofleastsquaremethodofsoilcumulativeevaporationunderdifferentrainfall,gravelsoilcoveringthicknessandgravelsoilmixingratio,theresultsshowthatallcanuselogarithmfunctiontorepresenttherelationshipbetweensoilcumulativeevaporationandtime,thecorrelationcoefficientofrainfallallgreaterthan(3)Accordingtotheanalysisofdifferentrainfall,gravelsoilcoveringthicknessandgrayelsoilmixlngratioofthesoilmoisturecontentchangeprocess,findsthatthesoilmoisturecontentchangealongthetimewiththeincreaseofrainfallandgravelsoilcoveringthicknessandgravelsandmixingratiodecrease,%,theChangesofsoilmoisturecontentforfivetreatnlentsareconsistent,itillustratesthatthebestinhibitoryeffectgravelcovering.(4)Usingtheleastsquaresmethodtoanalysisthesimilaritybetweenthetheoreticalandactualevaporationthresholdunderdifferentrainfall,gravelsoilcoveringthickness,,coverthickness,andthemixingratio,thecorrelationcoefficientgreaterthanThisresearchresultsforOptimizationofirrigationsystemandrestorationofecologicaIenvironmentprovidesdatasuppor,andpromotesthesustainabledevelopmentofagriculturegravel—:gravel。mulchedland,gravelsoilcover,soilevaporation,evaporationthres