【摘要】 在收集了青铜峡引黄灌区5个气象站最近5年气象资料的基础上,应用1998年FAO修正彭曼—蒙特斯公式,计算出各站逐年的参考作物蒸发蒸腾量ET0;在阐述灰关联分析理论与计算方法的基础上,利用灰关联分析理论计算出各站各气象因子与ET0的灰色关联度并进行排序。分析结果表明:各气象因子对参考作物蒸发蒸腾量的影响都比较大,尤其是日照时数、平均最高气温和年平均风速对各站的影响相对较大,而最低气温、相对湿度和降雨对各站的参考作物蒸发蒸腾量的影响相对比较小。更多还原

【Abstract】 Based on the meteorological data collected from five weather stations from 1999 to 2003 in the Qingtongxia Irrigation Area,the reference crop evapo-transpiration（ET₀） was calculated by applying the Penman-Monteith equation recommended by FAO in 1998.The grey relation degrees were analyzed by means of the Grey Theory.The analysis results reveal that the grey relation degrees of some meteorological factors（annual sunshine hours,average maximum temperature and average wind speed） with ET₀ are significant,while other factors（lowest temperature,relative humidity and annual rainfall） with ET₀ are small.更多还原