高原气象

高原气象 >

2015 , Vol. 34 >Issue 4: 1095 - 1106

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00114

论文

怀来地区蒸渗仪测定玉米田蒸散发分析

  • 杨光超 ,
  • 朱忠礼 ,
  • 谭磊 ,
  • 刘绍民 ,
  • 徐自为 ,
  • 柏军华 ,
  • 肖青
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  • 北京师范大学遥感科学国家重点实验室/地理学与遥感科学学院, 北京 100875;2. 中国科学院遥感与数字地球研究所, 北京 100094

收稿日期: 2014-01-28

  网络出版日期: 2015-08-28

基金资助

遥感科学国家重点实验室重大项目(270403GK);国家高技术研究发展计划(863)项目(2012AA12A305)

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Analysis on Evapotranspiration of Maize Field Measured by Lysimeters in Huailai

  • YANG Guangchao ,
  • ZHU Zhongli ,
  • TAN Lei ,
  • LIU Shaomin ,
  • XU Ziwei ,
  • BAI Junhua ,
  • XIAO Qing
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  • State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China;2. Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences, Beijing 100094, China

Received date: 2014-01-28

  Online published: 2015-08-28

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摘要

利用2012年和2013年怀来遥感综合试验站蒸渗仪、涡动相关仪和自动气象站观测资料, 分析了土壤蒸发和玉米农田蒸散的日、季节变化, 用多元回归分析法研究了气象因子(净辐射、空气温度、空气湿度、风速)、土壤水分和农田蒸散量的关系, 并将蒸渗仪蒸散观测值与涡动相关仪蒸散量观测值进行了比较。结果表明, 土壤蒸发和玉米农田蒸散日变化曲线较一致, 季节性差异明显;怀来地区日蒸散量与净辐射和土壤水分相关性较好, 与其他影响因子相关性不明显;蒸渗仪的农田代表性受其观测范围内的作物长势影响显著, 涡动相关仪观测的蒸散量与蒸渗仪观测值相关关系较好, 蒸渗仪观测值较涡动相关仪观测值高10.5%, 这是由于不能同周围农田进行热交换, 蒸渗仪内平均土壤温度较农田高了9.5%, 导致蒸渗仪对蒸散量的相对高估。

关键词： 蒸渗仪; 涡动相关仪; 蒸散量; 气象因子

本文引用格式

杨光超 , 朱忠礼 , 谭磊 , 刘绍民 , 徐自为 , 柏军华 , 肖青 . 怀来地区蒸渗仪测定玉米田蒸散发分析[J]. 高原气象, 2015 , 34(4) : 1095 -1106 . DOI: 10.7522/j.issn.1000-0534.2014.00114

Abstract

Based on the measurements of lysimeter, eddy covariance(EC) and automatic weather station(AWS) in Huailai Remote Sensing Experiment Station in 2012 and 2013, the daily and seasonal variation of soil evaporation and maize field evapotranspiration have been analyzed. The relationship between field evapotranspiration and meteorological factors(net radiation, air temperature, air humidity, and wind speed), soil moisture has been studied through multiple regression analysis method. Comparison has been made between the evapotranspiration measured by lysimeter and EC. The result shows that the daily variation curves of soil evaporation were quite consistent with maize field evapotranspiration, while seasonal differences were obvious. In the region of Huailai, net radiation and soil moisture obviously correlated with daily evapotranspiration, while other factors did not obviously correlated. Lysimeter's representativeness was significantly affected by the growth of the crops within it. The correlativity between evapotranspiration measured by EC and that by lysimeter is very good. The value of lysimeter is 10.5% higher than that of EC. As heat can not be exchanged between the soil in lysimeter and the soil outside, the average temperature of the soil in the lysimeter is 9.5% higher than that of the field outside. As a result, the evapotranspiration of lysimeter is relatively larger.

Key words： Lysimeter; Eddy Covariance Syst; Evapotranspiration; Meteorological Facto

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