红原县参照蒸散发的计算和影响因子分析

Calculation of Reference Evapotranspiration and Analysis of Influence Factors in Hongyuan County

为研究高寒地区参照蒸散发与气候因子之间的关系,以红原县为研究对象,收集了红原县7年的气象因子监测数据,利用Penman-Monteith(P-M)方法计算了该区域的参照蒸散发量并对其时间变化特征进行了分析.结果表明:该区域参照蒸散发存在明显的季节性变化,在夏季达到最高值.同时,通过单因子敏感性分析方法,研究了该区域气象因子对参照蒸散发的影响.研究发现,对参照蒸散发影响较大的气象因子依次为大气压、气温和日照时数.

The paper aims to study the relations between reference evapotranspiration(ET0)and the meteorological factors in the Alpine region.Hongyuan County of the Zoige wetland was taken as the research object.Based on the 7-year monitoring data of meteorological factors and by using the Penman-Monteith(P-M)model,the reference evapotranspiration volume of the region was calculated and the time change characteristics were analyzed.The results showed that the ET0 in this region demonstrated seasonal changes and the peaked value appeared in summer.At the same time,through the single factor sensitivity analysis method,the regional influence of meteorological factors on reference evapotranspiration was studied.It was found that the meteorological factors that exerted the most obvious influence on the reference evapotranspiration were atmospheric pressure,temperature and sunshine duration.