Exploring evapotranspiration stress in China: A blending approach employing multi-source remote sensing proxies

Liu, Yuan; Zhao, Yong; Zhai, Jiaqi; Liang, Hui; Zhu, Yongnan; Wang, Yong; Wang, Qianyang; Li, Xing; Yu, Jingshan

doi:10.1016/j.ejrh.2024.101653

Cited by 1 publication

(2 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where ET ins is instantaneous evapotranspiration (mm/hr), λ is the latent heat of evapotranspiration (J/kg), and the number 3600 is the time conversion factor from seconds to hours. After calculating ET ins , the reference ET fraction is calculated using Equation (9). Then, the actual daily evaporation is obtained by multiplying the reference ET fraction by the daily ET value of the reference plant (Equation ( 10)).…”

Section: Calculation Of Instantaneous and Daily Evapotranspirationmentioning

confidence: 99%

“…Traditional methods of measuring ET (e.g., lysimeter, eddy covariance, Bowen's ratio, FAO 56) are generally complex, costly, time-consuming, and point based [5,6]. Satellite data and remote sensing methods are increasingly employed for indirect ET measurements [7][8][9][10]. These data offer broad coverage, capturing heterogeneity and changes, while remaining cost-effective and featuring suitable time sequences and computer processing capabilities [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of Evaporation and Drought Stress of Pistachio Plant Using UAV Multispectral Images and a Surface Energy Balance Approach

Khormizi,

Malamiri,

Ferreira

2024

Horticulturae

View full text Add to dashboard Cite

Water scarcity is a critical abiotic stress factor for plants in arid and semi-arid regions, impacting crop development and production yield and quality. Monitoring water stress at finer scales (e.g., farm and plant), requires multispectral imagery with thermal capabilities at centimeter resolution. This study investigates drought stress in pistachio trees in a farm located in Yazd province, Iran, by using Unmanned Aerial Vehicle (UAV) images to quantify evapotranspiration and assess drought stress in individual trees. Images were captured on 10 July 2022, using a Matrix 300 UAV with a MicaSense Altum multispectral sensor. By employing the Surface Energy Balance Algorithm for Land (SEBAL), actual field evapotranspiration was accurately calculated (10 cm spatial resolution). Maps of the optimum crop coefficient (Kc) were developed from the Normalized Difference Vegetation Index (NDVI) based on standard evapotranspiration using the Food and Agriculture Organization (FAO) 56 methodology. The comparison between actual and standard evapotranspiration allowed us to identify drought-stressed trees. Results showed an average and maximum daily evaporation of 4.3 and 8.0 mm/day, respectively, in pistachio trees. The real crop coefficient (Kc) for pistachio was 0.66, contrasting with the FAO 56 standard of 1.17 due to the stress factor (Ks). A significant correlation was found between Kc and NDVI (R2 = 0.67, p < 0.01). The regression model produced a crop coefficient map, valuable to support precise irrigation management and drought prevention, considering the heterogeneity at the farm scale.

show abstract

Section: Calculation Of Instantaneous and Daily Evapotranspirationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of Evaporation and Drought Stress of Pistachio Plant Using UAV Multispectral Images and a Surface Energy Balance Approach

Khormizi,

Malamiri,

Ferreira

2024

Horticulturae

View full text Add to dashboard Cite

show abstract

Exploring evapotranspiration stress in China: A blending approach employing multi-source remote sensing proxies

Cited by 1 publication

References 65 publications

Estimation of Evaporation and Drought Stress of Pistachio Plant Using UAV Multispectral Images and a Surface Energy Balance Approach

Estimation of Evaporation and Drought Stress of Pistachio Plant Using UAV Multispectral Images and a Surface Energy Balance Approach

Contact Info

Product

Resources

About