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中国沙漠 ›› 2015, Vol. 35 ›› Issue (3): 683-689.DOI: 10.7522/j.issn.1000-694X.2014.00039

• 生物与土壤 • 上一篇    下一篇

Budyko方程和单作物系数法在区域蒸散发估算中的耦合及应用

王帅兵1,2, 李常斌1,2, 杨林山1,2, 杨文瑾1,2   

  1. 1. 兰州大学 资源环境学院, 甘肃 兰州 730000;
    2. 兰州大学 西部环境教育部重点实验室, 甘肃 兰州 730000
  • 收稿日期:2013-12-28 修回日期:2014-03-26 出版日期:2015-05-20 发布日期:2015-05-20
  • 通讯作者: 李常斌(Email:licb@lzu.edu.cn)
  • 作者简介:王帅兵(1991-), 女(满族), 辽宁清原人, 硕士研究生, 主要从事生态水文方面的研究。Email:wangshb13@lzu.edu.cn
  • 基金资助:

    国家自然科学基金项目(41001014);高等学校博士学科点专项科研基金项目(2011021110011);兰州大学中央高校基本科研业务费专项(lzujbky-2014-118)

Application of the Coupled Budyko Equation and Single Crop Coefficient Approach on Regional Evapotranspiration Estimation

Wang Shuaibing1,2, Li Changbin1,2, Yang Linshan1,2, Yang Wenjin1,2   

  1. 1. College of Earth and Environment Science, Lanzhou University, Lanzhou 730000, China;
    2. Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou 730000, China
  • Received:2013-12-28 Revised:2014-03-26 Online:2015-05-20 Published:2015-05-20

摘要:

实际蒸散发(ET)是水文循环的关键环节,分布式量化ET是区域水量平衡计算的重要内容。本文基于Budyko水热耦合方程推算单作物系数,在单作物系数和基于遥感方法的叶面积指数(LAI)之间进行统计回归,建立计算LAI的模式,实现Budyko方程进行区域ET估算的空间分辨率提升。洮河流域的范例研究证实了两种方法耦合在复杂地理-生态区间应用的合理性。本文为区域ET的分布式量化研究提供了一种新的思路。

关键词: ET, Budyko方程, 作物系数法, 洮河流域

Abstract:

Evapotranspiration (ET) is an important section of the hydrological cycle, participating in and influencing the land surface water budget. In this study, the single crop coefficient (Kc) was derived from ET estimation based on Budyko water-heat coupled equation. Kc was then regressed with the leaf area index (LAI) extracted from the remote sensed MODIS NDVI for the establishment of the LAI-based ET module. From the coupled approach, the spatial resolution of the ET estimation could be enhanced to a level corresponding to that of the remote sensing images. Application of the coupled approach in the Taohe River Basin verified a reasonable example in regional ET estimation across a complicated and geo-ecological differentiations formed area. The coupling of the two approaches in this study provided a new idea for quantification of the regional ET.

Key words: ET, Budyko Equation, crop coefficient method, Taohe River Basin

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