Estimation of Evapotranspiration over Huangfuchuan Watershed Using Remote Sensing

YU Hongbo; YANG Jie; Bao Tiejun

doi:11894/1005-829x.2008.28(1).102

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Estimation of Evapotranspiration over Huangfuchuan Watershed Using Remote Sensing

- Estimation of Evapotranspiration over Huangfuchuan Watershed Using Remote Sensing
- Bulletin of Soiland Water Conservation Vol. 27, Issue 1, Pages: 102-105(2008)
- 作者机构：
  
  1. 内蒙古草地生态重点实验室省部共建国家重点实验室培育基地,内蒙古,呼和浩特,010021
  2. 内蒙古大学,内蒙古,呼和浩特,010021
  3. 内蒙古师范大学,内蒙古,呼和浩特,010022
- 作者简介：
- 基金信息：
- DOI：11894/1005-829x.2008.28(1).102
  CLC： P338.6
- Published：2008
- 稿件说明：
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YU Hongbo, YANG Jie, Bao Tiejun. Estimation of Evapotranspiration over Huangfuchuan Watershed Using Remote Sensing[J]. Bulletin of Soiland Water Conservation, 2008, 27(1): 102-105.
DOI：

YU Hongbo, YANG Jie, Bao Tiejun. Estimation of Evapotranspiration over Huangfuchuan Watershed Using Remote Sensing[J]. Bulletin of Soiland Water Conservation, 2008, 27(1): 102-105. DOI： 11894/1005-829x.2008.28(1).102.

摘要

在利用TM资料求取皇甫川流域地表特征参数和地表能量平衡各参量的基础上

反演出该流域的瞬时蒸散量

经过尺度转换

得到日蒸散量。在该估算方法中

将水体当作裸地进行处理

但水体和土壤的性质差别很大

用Penman公式对水体蒸发进行了单独估算

整合到流域日蒸散量中

以提高精度。分析结果表明

用该方法反演的日蒸散量与地表状况比较吻合

经过检验

反演的地表温度相对误差为0.58%

反演的日蒸散量平均相对误差为11.75%

都在误差允许范围之内。

Abstract

Instantaneous evapotranspiration in Huangfuchuan watershed is retrieved based on the estimation of land surface characteristic parameters and fluxes using Landsat5 tM. Daily evapotranspiration is found by scaling. Water body is dealtwith as bare land. The characteristics between water body and soil are very dis-tinct

so Penman model is used to calculate water evaporation and the calculated resultis merged into daily evapotranspiration. Results show thatdaily evapotranspiration retrieved is accord with the status of land sur-face. The relative error of surface temperature retrieved is 0. 58% and the relative error of daily evapotransp-i ration retrieved is 11. 75%

which are both permitted.

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