Using penman-monteith method to estimate potential evapotranspiration in taiwan by using AVHRR and MODIS satellites remote sensing data

Min Kuo Chen, Pao-Shan Yu, Hong Du Rong, Yuan Lin Chin

研究成果: Conference contribution

摘要

Recent advances in remote sensing technology have led to ways of estimating regional evapotranspiration from AVHRR satellite images. The newly developed MODIS satellite is being increasingly used in estimating evapotranspiration. This study aims to estimate the meteorological characteristics of Penman-Monteith method from AVHRR and MODIS images and then the evapotranspiration results are compared. Four major meteorological characteristics (air temperature, vapor pressure deficit, wind speed, and net radiation) were derived from images and station observations. The average errors of the evapotranspiration estimation were 1.197 mm/day (AVHRR) and 0.63 mm/day (MODIS), and the relative root-mean-squared errors were 0.477 (AVHRR) and 0.288 (MODIS). The verification results revealed that both MODIS and AVHRR images can be applied to estimate evapotranspiration, in which the estimation using MODIS images is better. Amount these four meteorological characteristics, the net radiation has the best estimation and the win speed was the poorest. However, the most sensitivity of the net radiation has led the worst result in estimating evapotranspiration. The accurately estimation of the net radiation is necessary in the future. Totally, the influence by the error of each meteorological characteristic was less than 11%. This suggested that this method with MODIS images is useful and practical in regional potential evapotranspiration estimation and can be suitably used in ungauged areas.

原文English
主出版物標題Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005
頁面345-354
頁數10
出版狀態Published - 2005 十二月 1
事件26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC - Ha Noi, Viet Nam
持續時間: 2005 十一月 72005 十一月 11

出版系列

名字Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005
1

Other

Other26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC
國家Viet Nam
城市Ha Noi
期間05-11-0705-11-11

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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  • 引用此

    Chen, M. K., Yu, P-S., Rong, H. D., & Chin, Y. L. (2005). Using penman-monteith method to estimate potential evapotranspiration in taiwan by using AVHRR and MODIS satellites remote sensing data. 於 Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005 (頁 345-354). (Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005; 卷 1).