Analysis and application of the Converted Evaporation of Small Evaporator and E-601 Evaporator Based on Multiple Methods
This paper aims to explore the characteristics of evaporation in Guiyang,and to provide some references for the storage of mountain pond reservoir,etc.,based on the observed evaporation from small-scale evaporator and E-601 evaporator in Guiyang during 1983-2001.Using the conversion coefficient method,linear regression method,and multiple regression method,the evaporation of small evaporator is converted and compared to the evaporation of E-601 evaporator.The optimal method is selected to convert the evaporation data of small evaporator and extend the large-scale evaporation sequence.It has been found that there is a significant correlation between the evaporation rates of small evaporator and E-601 evaporator.Higher temperature,longer sunshine duration,lower humidity and fewer clouds correspond to larger evaporation rates,and vice versa.The annual average evaporation of small evaporator is 61.3%higher than that of E-601 evaporator,with a monthly increase of 43.5%～78.1%.The evaporation value measured by the E-601 evaporator can better represent the local climate characteristics.The conversion coefficient,linear regression,and multiple regression models all provide effective conversion methods for small-scale evaporation,offering a scientific basis for extending the large-scale evaporation sequence.Among them,the linear regression and conversion coefficient methods are simpler and quicker,while the multiple regression is more suitable for daily value conversion but involves more complex calculations.Over the past 62 years,Guiyang City has shown an increasing trend in annual evaporation,decreasing in the first half of the year and increasing in the second half.Calculating the water surplus and deficit combined with precipitation suggests that the concentrated period of water surplus in the summer half year in Guiyang City occurs from May to July while the water deficit period in the winter half year is long,with sufficient water for winter.
evaporation of E-601 evaporatorevaporation of small evaporatorconversionGuiyang
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