欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2016, Vol. 27 ›› Issue (6): 1727-1736.doi: 10.13287/j.1001-9332.201606.040

• 目次 • 上一篇    下一篇

不同植被条件下实际蒸散的变化特征及其影响因子——以淮河流域为例

吴荣军1,2*, 邢晓勇2   

  1. 1江苏省农业气象重点实验室, 南京 210044;
    2南京信息工程大学应用气象学院, 南京 210044
  • 收稿日期:2015-11-20 发布日期:2016-06-18
  • 通讯作者: wurj@nuist.edu.cn
  • 作者简介:吴荣军,男,1975年生,博士,副教授.主要从事农业气象灾害和污染生态研究. E-mail: wurj@nuist.edu.cn
  • 基金资助:
    本文由国家自然科学基金项目(41575110)、中国气象局/河南省农业气象保障与应用技术重点开放实验室开放研究基金项目(AMF201305)和国家自然科学基金委员会-广东联合基金(二期)超级计算科学应用研究专项(nsfc2015_233)资助

Variation characteristics and influencing factors of actual evapotranspiration under various vegetation types: A case study in the Huaihe River Basin, China.

WU Rong-jun1,2*, XING Xiao-yong2   

  1. 1Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing 210044, China;
    2School of Applied Meteorology, Nanjing University of Information Science &
    Technology, Nanjing 210044, China
  • Received:2015-11-20 Published:2016-06-18

摘要: 基于遥感-过程耦合模型开展淮河流域2001—2012年实际蒸散(ET)的模拟研究,并对其时空变化特征、不同覆被类型下的区域实际蒸散特征及其主要影响因子进行定量分析.结果表明: 研究期间,研究区年均ET在空间上呈现由东南向西北逐渐递减的趋势;时间上呈现逐年增加趋势,月际波动为双峰变化曲线.不同植被类型下ET的差异性表现为: 农田对研究区域实际蒸散总量的贡献最大;混交林的年均单位面积实际蒸散量最大,裸地的年均单位面积实际蒸散量最小;除裸地以外,其他土地覆被类型年均实际蒸散都呈增长趋势,其中常绿阔叶林实际蒸散增加趋势最明显.平均温度等热力学因子是影响淮河流域实际蒸散的主导因子,其次是辐射因子和水分因子.

Abstract: The actual evapotranspiration was modelled utilizing the boreal ecosystem productivity simulator (BEPS) in Huaihe River Basin from 2001 to 2012. In the meantime, the quantitative analyses of the spatial-temporal variations of actual evapotranspiration characteristics and its influencing factors under different vegetation types were conducted. The results showed that annual evapotranspiration gradually decreased from southeast to northwest, tended to increase annually, and the monthly change for the average annual evapotranspiration was double-peak curve. The differences of evapotranspiration among vegetation types showed that the farmland was the largest contributor for the evapotranspiration of Huaihe Basin. The annual actual evapotranspiration of the mixed forest per unit area was the largest, and that of the bare ground per unit area was the smallest. The changed average annual evapotranspiration per unit area for various vegetation types indicated an increased tendency other than the bare ground, with a most significant increase trend for the evergreen broadleaf forest. The thermodynamic factors (such as average temperature) were the dominant factors affecting the actual evapotranspiration in the Huaihe Basin, followed by radiation and moisture factors.