ET_0计算中ngstrm-Prescott系数的取值  

Values of the Coefficient of ngstrm-Prescott in ET_0 Calculation

作　　者：贺兴宏[1] 管瑶[1] 

机构地区：[1]新疆塔里木大学水利与建筑工程学院,新疆阿拉尔843300

出　　处：《人民黄河》2012年第9期91-94,共4页Yellow River

基　　金：新疆塔里木大学校长基金硕士项目(TDZKSS07016)

摘　　要：利用乌鲁木齐、银川等全国103个气象台站点55 a的气象资料,研究了ngstrm-Prescott系数在不同时间尺度的取值方法及其误差对参考作物蒸发蒸腾量计算结果的影响,并与国际粮农组织推荐值估算的结果进行了对比。结果表明:可以用当地拟合ngstrm-Prescott系数的全年均值来计算参考作物蒸发蒸腾量;利用国际粮农组织推荐值估算的选取站点的太阳辐射和参考作物蒸发蒸腾量的全年最大相对误差分别为11%和13%,推荐值估算的太阳辐射和参考作物蒸发蒸腾量的误差与ngstrm-Prescott系数的误差不成比例。Based on the data from 103 meteorological stations in Urumqi, Yinchuan and so on of 55 years, this paper studied the influence of the coefficient of Angstram-Prescot and coefficient valued in different time scales and its results error on evapotranspiration, and compared it with the results estimated by the recommended value of FAO. The results indicate that local yearly averaged value can be used to estimate the reference evapotranspiration, compared with the results estimated by the recommended value of FAO, the maximum yearly relative error of radiation and reference evapotranspiration is 11% and 13% respectively, which means that the relative error of radiation and reference evapotranspiration is disproportion with the Angstram-Prescott value.

关 键 词：ngstrm-Prescott系数 参考作物蒸发蒸腾量 PENMAN-MONTEITH 太阳辐射 

分 类 号：S274.1[农业科学—农业水土工程]