摘要
基于Landsat-8数据,采用遥感Priestly-Taylor模型分别估算蓟州区的净辐射通量以及归一化植被指数,进一步计算蓟州区日蒸散发量。区域蒸散发的遥感反演主要解决以下两个问题:一是遥感地表温度的反演;二是估算各类遥感模型所需的地表参数(叶面积指数、NDVI、地表阻抗等),结合物理模型或者半经验公式估算区域蒸散发。蒸散发作为研究陆地地表水文循环过程的重要参数,掌握其快速估算模型对水文工程项目提供数据支撑,为揭示蓟州区地表能量和不同土地利用类型的定量关系,研究天津市生态环境建设和人居环境优化具有重要意义。
Firstly,based on Landsat-8 data,we use remote sensing Priestly-Taylor model to estimate the net radiation flux and normalized vegetation index of Jizhou area,and further calculate the daily evapotranspiration.The remote sensing inversion of regional evapotranspiration mainly solves the following two problems:first,the inversion of remote sensing surface temperature;second,the estimation of surface parameters(leaf area index,NDVI,surface impedance,etc.)required by various remote sensing models combined with physical models or semi empirical formulas to estimate regional evapotranspiration.Evapotranspiration is an important parameter in the study of land surface hydrological cycle process.Mastering its rapid estimation model provides data support for hydrological engineering projects.It is of great significance to study the ecological environment construction and human settlements optimization of Tianjin in order to reveal the quantitative relationship between surface energy and different land use types in Jizhou district.
作者
王仲想
黄敏
郝煜
WANG Zhongxiang;HUANG Min;HAO Yu(Academy of Prospecting of Tianjin,Tianjin 300110,China)
出处
《测绘与空间地理信息》
2022年第3期105-107,共3页
Geomatics & Spatial Information Technology
关键词
蒸散发
遥感P-T模型
土地利用
evapotranspiration
romote sensing P-T model
land use
