Towards Tree-level Evapotranspiration Estimation with Small UAVs in Precision Agriculture

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Haoyu Niu YangQuan Chen

Towards Tree-level Evapotranspiration Estimation with Small UAVs in Precision Agriculture

Haoyu Niu, YangQuan Chen

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English

Springer International Publishing AG
28 October 2022

Geographical information systems (GIS) & remote sensing; Drought & water supply; Aerospace & aviation technology; Agronomy & crop production

Estimating evapotranspiration (ET) has been one of the most critical research areas in agriculture because of water scarcity, the growing population, and climate change. The accurate estimation and mapping of ET are necessary for crop water management. Traditionally, researchers use water balance, soil moisture, weighing lysimeters, or an energy balance approach, such as Bowen ratio or eddy covariance towers to estimate ET. However, these ET methods are point-specific or area-weighted measurements and cannot be extended to a large scale. On the other hand, while remote sensing is able to provide spatially distributed measurements, the spatial resolution of multispectral satellite images is often not enough for crops with clumped canopy structures, such as trees and vines. Unmanned aerial vehicles (UAVs) can mitigate these spatial and temporal limitations. Lightweight cameras and sensors can be mounted on the UAVs and take high-resolution images. Unlike satellite imagery, the spatial resolution of the UAV images can be at the centimeter-level. UAVs can also fly on-demand, which provides high temporal imagery. This book examines the different UAV-based approaches of ET estimation. Models and algorithms, such as mapping evapotranspiration at high resolution with internalized calibration (METRIC), the two-source energy balance (TSEB) model, and machine learning (ML) are discussed. It also covers the challenges and opportunities for UAVs in ET estimation, with the final chapters devoted to new ET estimation methods and their potential applications for future research.

By: Haoyu Niu, YangQuan Chen
Imprint: Springer International Publishing AG
Country of Publication: Switzerland
Edition: 2022 ed.
Dimensions: Height: 235mm, Width: 155mm,
Weight: 442g
ISBN: 9783031149368
ISBN 10: 303114936X
Pages: 156
Publication Date: 28 October 2022
Audience: Professional and scholarly , Undergraduate
Format: Hardback
Publisher's Status: Active

YangQuan Chen received his PhD degree in advanced control and instrumentation from the Nanyang Technological University in Singapore. Currently, he is a full professor at the University of California Merced. His Mechatronics, Embedded Systems and Automation (MESA) Lab at UC Merced is emerging as a widely known “drone lab” with the vision to build an “agriculture drone valley” in California’s Central Valley. The lab’s work on low-cost, reliably airworthy, multispectral UAV-based remote sensing systems helps create a new type of information services valuable not only for farming and growing, but also for environmental monitoring and assessment. Prof Chen has published over 300 peer-reviewed paper and more than 20 books/book chapters.