基于Penman-Monteith模型的蒸散模拟评估分析  

Evaluation and Analysis Evapotranspiration based on Penman-Monteith Model

作　　者：王哲[1] Wang Zhe(People＇s Liberation Army University,Jiangsu Nanjing 211100)

机构地区：[1]解放军理工大学,江苏南京211100

出　　处：《内蒙古气象》2018年第2期22-25,共4页Meteorology Journal of Inner Mongolia

摘　　要：根据南京地区粳稻、籼稻两个品种水稻分别在干旱、水层条件下的逐时、逐日蒸散量观测资料,采用Penman-Monteith模型(以下简称PM模型)对水稻蒸散量进行模拟,并对比模拟蒸散值与观测蒸散值。通过计算,对PM模型的可靠性进行验证。结果表明:(1)水层条件下PM模型的精度比干旱条件下高。(2)模拟值乘以作物系数后,与蒸散实际测量值更加接近。(3)通过敏感性分析可知,使用PM模型进行蒸散量模拟时,方程中各个因子取值的准确性对模拟结果的精确度有较大影响,计算时要合理确定各个因子值。(4)水层条件下稻田的蒸散量明显大于干旱条件下的蒸散量。According to the observation data of evapotranspiration in Nanjing region,We plant Japonica rice and Indica rice in two kinds of soil.One is full of water,the other is dry.After that,we use Eddy correlation to measurement the evapotranspiration in per hour and Accumulate together.Finally,We can get the evapotranspiration in per day.Using Penman-Monteith model to get The calculation of evapotranspiration in rice field and Contrasting simulation and observation values,We find the reliability of Penman-Monteith model is verified.After using the Penman-Monteith model,The results of the calculation are multiplied by Kc, the crop coefficient ,to get the corrected simulation evapotranspiration;In this experiment, the actual evapotranspiration of rice field under different water conditions was compared too.The results show that：The first,The accuracy of PM model of water condition is higher than that of drought condition.Second,After the simulation value multiplied by the crop coefficient, the actual measurement value of the evapotranspiration was closer to the actual value of the evapotranspiration.Third,Through sensitivity analysis, using the PM model, the accuracy of each factor in the equation has a great influence on the accuracy of the simulation.Therefore, it is reasonable to determine the factors in the calculation.fourth,The evapotranspiration of paddy field under water condition is significantly higher than that of drought.

关 键 词：稻田蒸散 PM模型 作物系数 

分 类 号：S161.4[农业科学—农业气象学]