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1、分析雨量蒸发器雨量的时间偏差小型蒸发器蒸发量计算公式为：蒸发量=原量+降水量-余量，由此可直观看出小型蒸发器蒸发量若为负值，只有一个原因，那就是小型蒸发器的原量+降水量＜蒸发余量。现就这一现象原因进行分析。Smallevaporatorevaporationcapacitycalculationformulais:evaporation=theoriginalquantity+precipitation一margin,whichcanbeevaporationifdirectlyseethesmal1evaporatornegative,justforon
2、ereason,thatistheoriginalamountofthesmal1evaporator<+rainfallthisphenomenonareanalyzed.evaporationallowance.Regardingthereasonfor1.1小型蒸发器和蒸发专用雨量器的差异1.1specialraingaugedifferencessmallevaporatorandevaporation小型蒸发器为口径20cm、高约10cm的金属圆盆，受水界面较为单一；而蒸发专用雨量器是曲全新不锈钢的口径为20cm的承水器（漏斗）、储水筒、储水瓶几
3、个部件组成，承水器与漏斗连接面不是一个完整无隙的受面体，雨水经过承水器（漏斗）流入储水瓶内,承水器表面和储水瓶都会吸附一些雨水，漏斗与承水器之间的接缝也会收纳一些雨水，最终造成从蒸发专用雨量器中量取出的雨量会比实际偏少一些。Forsmal1evaporatordiameter20cm,about10cmhighmeta1roundbasin,waterinterfaceisrelativelysingle;Evaporationanddedicatedraingaugeisanewstainlesssteeldiameterofabout20cmofwat
4、erbearing(cone),storagetank,storagebottleafewparts,bearingwaterdeviceandhopperjunctionsurfaceisnotacompletenogapofthesurface,therainafterbearing(funnel)flowsintothereservoirwaterbottles,waterbearingwatersurfaceandthereservoirwaterbottleswi11absorbsomerain，funnel，andthejuncturebetw
5、eenwaterwi11alsoreceivesomerain,andeventuallycausefromevaporationinspecialraingaugetolessthantheactualrainfal1.由于小型蒸发器和蒸发专用的雨量器安a装位置不同，有时因风向的不同，落入蒸发专用雨量器中的雨水比落入小型蒸发器蒸发皿内的雨水少，相应地，原量+降水量的数值就减小了。Becauseofthesmallevaporatorevaporationanddedicatedtheraingaugeinaputpositionisdifferent,s
6、ometimesduetothedifferenceofthedirectionofthewind,fallingintoevaporationdedicatedraingaugeintherainthanthosewhofallintothesmal1evaporatorevaporationpan,littlerain,accordingly,theoriginalvolume+andprecipitationwasreduced・1.2量取蒸发量和蒸发雨量的时间差1.2measuringevaporationofrainfallandevaporat
7、iontimelag当观测时正遇降水，量完蒸发量再去量蒸发雨量，微雨时，前后时间差的雨量差较小，如果雨势大，雨量差可达零点几毫米，这个雨量差造成了当日蒸发量偏大及次日蒸发量偏小的情况；若次日的天气状况较差,蒸发量较少，就有可能造成次日蒸发量测定值为负值的情况出现。Whenobservationsareinprecipitation,theevaporationquantitytorainfallevaporationamount,smal1rain,thetimedifferencebeforeandafterrainfa11differenceissma
8、l1,iftherainisbig,generalrainfal1
