彭曼公式在湖积平原适用性分析  

Applicability Analysis of Penman Formula in Lacustrine Plain

作　　者：何沛欣 He Peixin(935 Team in Geology Bureau for Nonferrous Metals of Guangdong Procvince)

机构地区：[1]广东省有色金属地质局九三五队

出　　处：《现代矿业》2019年第7期47-50,55,共5页Modern Mining

摘　　要：为定量分析彭曼公式在湖积平原的适用性及计算精度,对彭曼公式的参数进行率定,将估算的蒸发量与某湖积平原区气象站实测蒸发量进行相关分析,运用基于偏导数的敏感系数法分析经验型参数对估算结果的敏感性,并定量分析不同蒸发输入对地下水数值模拟精度的影响。结果表明,彭曼公式中水面反射系数和风速函数系数的敏感系数偏小,估算结果与实测蒸发量相关性较高,满足地下水数值模拟精度,且能很好重现极端气候下水面蒸发能力特征,可用于该地区水面蒸发能力分析和地下水数值模拟应用。In order to quantitatively analyze the applicability and accuracy of the Penman formula in the lacustrine plain,the parameters of the Penman formula are determined,and the estimated evaporation is correlated with the measured evaporation of the meteorological stations,and the sensitivity coefficient based on the partial derivative is used.The method analyzes the sensitivity of empirical parameters to the estimation results,and quantitatively analyzes the influence of different evaporation inputs on the numerical simulation accuracy of groundwater.The results show that the sensitivity coefficient of the water surface reflection coefficient and the wind speed function coefficient in the Penman formula is too small,and the correlation between the estimation result and the measured evaporation amount is high,which satisfies the accuracy of groundwater numerical simulation and also can reproduce the characteristics of water surface evaporation ability in extreme climate.It can be used for water surface evaporation capacity analysis and groundwater numerical simulation application in the case.

关 键 词：彭曼公式修正式 地下水流模型 适用性分析 极端气候 

分 类 号：P426.2[天文地球—大气科学及气象学] P641