Study on Reference Evapotranspiration Change and Its Influencing Factors in Shenzhen
Reference Evapotranspiration(ET0)is an important calculation basis for crop water demand and has guiding significance for regional agricultural production water use.Based on the meteorological data of Shenzhen meteorological station in Guangdong Province in the past 60 years,this paper calculates ET0 according to the Penman-Monteith formula recommended by the Food and Agriculture Organization of the United Nations(FAO),and uses linear trend method,moving average method and correlation analysis method to demonstrate the regional ET0 changes in detail.The results show that the trend of inter-annual and intra-year ET0 changes in Shenzhen meteorological station in recent 60 years is consistent,showing a decline;The ET0 analysis of different seasons in the past 60 years shows that the ET0 is the largest in summer and the smallest in winter.The interannual seasonal ET0 analysis in recent 60 years shows that spring,summer,autumn and winter all show a downward trend.Daily maximum temperature has the strongest correlation with ET0,while relative humidity has the weakest correlation with ET0.
万方数据
维普
