Development of a system to estimate evapotranspiration over complex terrain using Landsat MSS, elevation and meteorological data
Development of a system to estimate evapotranspiration over complex terrain using Landsat MSS, elevation and meteorological data
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开发利用 Landsat MSS、海拔和气象数据估算复杂地形蒸散量的系统
DOI：
10.1080/02626668909491372
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
K. Kotoda
中科院分区：
文献类型：
--
作者：
T. Hoshi;S. Uchida;K. Kotoda
摘要为了估算区域蒸散量(ET)，开发了一个利用陆地卫星MSS和高程数据的系统。通过对研究区的提取和几何校正，将陆地卫星MSS数据划分为土地利用类型，为ET值的计算提供了经验参数。高程数据最初是在纬度7.5“×经度11.25”的网格上给出的，它被内插并适配到土地利用图像数据的每个像素。ET值的计算是根据几个观测站的气象要素与海拔高度线性回归的经验函数进行的。计算结果不仅以统计量的形式表示，而且以变换后的图像数据的形式表示。以影像数据表示的山区ET值的分布合理地反映了地形的影响。通过与蒸发皿蒸发量的观测数据和Thornthwaite方法的估计值进行比较，可以得出结论：该系统具有较高的实用价值。
Abstract In order to estimate areal evapotranspiration (ET), a system using Landsat MSS and elevation data is developed. After extraction of the study area and its geometric correction, Landsat MSS data are classified into land use categories, which give empirical parameters for calculation of ET. Elevation data, which are originally given at the mesh of 7.5” in latitude by 11.25” in longitude, are interpolated and fitted to each pixel of land use image data. Calculation of ET is executed by using empirical functions in terms of meteorological elements which are linearly regressed with elevation from data at several observatories. The calculated results are represented by the form of not only statistical quantities but also transformed image data. The distribution of ET over mountainous areas, represented as image data, reasonably shows the effect of topography. After comparing with observed data of pan evaporation and with the values estimated by Thornthwaite's method, one can conclude that this system w...