气象因子的变化对参考作物蒸发蒸腾量的影响  

The Impact of Change of Climate Factors on the Reference Evapotranspiration in Dongjiang River Basin

作　　者：谢平[1] 陈晓宏[2] 王兆礼[3] 钟来元[1] 

机构地区：[1]广东海洋大学农学院,广东湛江524088 [2]中山大学水资源与环境系,广州510275 [3]华南理工大学土木与交通学院,广州510641

出　　处：《灌溉排水学报》2011年第5期12-16,共5页Journal of Irrigation and Drainage

基　　金：国家自然科学基金重点项目(50839005);广东海洋大学博士启动基金项目(0912257)

摘　　要：根据东江流域1961—2005年的气象资料,利用平均影响量和气象因子缺失数值试验,分析气象因子变化对参考作物蒸发蒸腾量的影响。结果表明,日照时数的平均影响量最大,温度、相对湿度其次,二者相近,风速最小;夏季日照时数的平均影响量比其他因子大得多,冬、春季日照时数的平均影响量依然最大,但与温度、相对湿度的平均影响量差距减小。用相对敏感系数和气象因子的相对变化量对参考作物蒸发蒸腾量进行估算,夏季的预测效果比冬春季好;随输入气象因子数量的减少,预测效果降低,夏季降低不明显,冬春季降低明显。夏季东江流域参考作物蒸发蒸腾量的主要气象影响因子是日照时数,冬、春季是日照时数和相对湿度。Based on the monthly historical climate dataset from 1961—2005 of Dongjiang River Basin,the impact of change of climatic factors on reference evapotranspiration（ET0） are analyzed using average impact advanced this article and numeral experimentation absenting climatic factors.Results showed that the average impact of sunlight radiation was the most,followed by relative humidity,air temperature and wind speed.The average impact of sunlight radiation was much larger than that of air temperature and relative humidity in summer.Though the average impact of sunlight radiation was the most,the difference with that of air temperature and relative humidity decrease in winter.The effect estimating ET0 with relative climatic factors and relative sensitivity coefficients was better in summer than in winter.The effect estimating ET0 weakens with decrease of the number of climatic factors,it slightly weakens in Summer,strongly weakens in Winter and Spring.The main climatic factor that impact on reference evapotranspiration is sunlight radiation in Summer,that is sunlight radiation,relative humidity.

关 键 词：参考作物蒸发蒸腾量 敏感系数 气象因子 东江流域 

分 类 号：S161.4[农业科学—农业气象学]