.png){kind=icon}
返回
Optimized algorithm for evapotranspiration retrieval via remote sensing
.png){kind=icon}
PRE
AI
DOI：10.1016/j.agwat.2021.107390.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Many algorithms for surface energy balance (SEB) based on remote sensing (RS) have been advanced to determine evapotranspiration (ET). These algorithms were developed for specific conditions (e.g., sensors, land use, and crop management) in which functions and empirical parameters within its algorithms concur with those conditions. Therefore, this study aims to develop a SEB-RS algorithm for retrieving ET adjusted to in situ observations. The study was conducted in two experimental fields in Brazil with the crops Jatropha curcas, maize, soybean, and sugarcane. We used multispectral images from the orbital sensors, Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) coupled in Landsat 8 satellite and from the terrestrial sensor, Altum, on board of an unmanned aerial vehicle. The proposed algorithm termed as Ground-truthed Surface Energy Balance (GT-SEB) is based on physical formulation of SEB-RS algorithms, where two extra computational processes using in situ ET observations were proposed for originating the new algorithm. The first additional process for optimizing the automatic anchor pixels selection and another for algorithm parameters optimization. Thus, both processes aim to reduce the difference between the observed ET and estimated by GT-SEB. Being assessed for both orbital (OLI/TIRS) and suborbital (Altum) sensors, the GT-SEB yielded excellent results (root-mean-square error, RMSE, <= 0.48 mm and modified Kling-Gupta efficiency, KGE, >= 0.92). In addition to GT-SEB being an optimized algorithm, it uses a classic parameterization of SEB-RS algorithms, providing efficiency and scalability for other remote sensors, climates, and surfaces.
Keyword:
Irrigation
Geoprocessing
Data-driven
Precision agriculture
期刊
IF:
6.5
论文数:
8.8K
被引数:
3.5W
机构
引用论文
Monin-Obukhov length as a cornerstone of the SEBAL calculations of evapotranspiration.png)
JOURNAL OF HYDROLOGY
JOURNAL OF HYDROLOGYIF6.3
PREAI
分享收藏Facile Synthesis, Characterization, Nanocrystal Growth and Photoluminescence Properties of GeS NanowiresNano
NanoIF0
PREAI
分享收藏分享收藏Mechanical, but not infective, pacemaker erosion may be successfully managed by re-implantation of pacemakers.Heart
OAAI
HeartIF0
OAAI分享收藏
查看更多内容