热带作物学报2025，Vol.46Issue(7)：1774-1784,11.DOI:10.3969/j.issn.1000-2561.2025.07.024
基于地表能量平衡模型的海南橡胶林蒸散发研究
Evapotranspiration from Rubber Plantations in Hainan Based on the SEBS Model
摘要
Abstract
Evapotranspiration as a key component of the energy balance and hydrological cycle,not only plays an im-portant supporting role in ecosystem stability and water resource management,but is also a crucial indicator for evalu-ating agricultural water use efficiency.Obtaining high spatiotemporal resolution data can reveal the dynamics of evapo-transpiration,which is of great significance for analyzing ecological and hydrological processes.The region studied is rubber plantations in Danzhou city,Hainan province.Based on daily meteorological data from flux tower observations and ten corresponding scenes of Landsat 8 satellite imagery for the same period,the daily evapotranspiration of the rubber plantations in 2022 was estimated using the surface energy balance system(SEBS)model,and the results were validated for accuracy using the eddy covariance method.The results showed that the SEBS estimated daily evapotran-spiration values from rubber plantations had a good correlation with the eddy covariance measured values(R2=0.88,RMSE=0.55,RE=18.95％).The daily evapotranspiration exhibited significant seasonal variation,showing that the wet season was significantly higher than the dry season.The maximum daily evapotranspiration occurred on July 31,reach-ing 4.40 mm,while the minimum daily evapotranspiration occured on January 28 and March 9,both at 1.38 mm.The accuracy of evapotranspiration derived from Landsat 8 imagery was influenced by factors such as vegetation cover and spatial heterogeneity.Therefore,the accuracy of the evapotranspiration varied with distance from the flux tower.Overall,the SEBS model showed the highest accuracy for rubber plantations within 1.5 km of the flux tower(RMSE=0.53,RE=18.08％),while it had the lowest accuracy for areas situated 1.0 km from the tower(RMSE=0.65,RE=22.26％).In conclusion,this study would provide a reference for improving the spatiotemporal resolution of evapotranspiration da-tasets,reveal the seasonal variability and spatial patterns of evapotranspiration in rubber plantations,and contribute to the development of effective water resource management and regulation policies in rubber plantation ecosystems.关键词
蒸散发/橡胶林/SEBS/涡度相关/Landsat 8Key words
evapotranspiration/rubber plantations/SEBS/eddy covariance/Landsat 8分类
农业科技引用本文复制引用
程琦雯,王晶晶,吴炳孙,吴志祥,叶回春,杨川,王紫璇,蔡丰政,杨珺..基于地表能量平衡模型的海南橡胶林蒸散发研究[J].热带作物学报,2025,46(7):1774-1784,11.基金项目
海南省科技专项(No.ZDYF2024XDNY196) （No.ZDYF2024XDNY196）
国家自然科学基金项目(No.42167011) （No.42167011）
中国热带农业科学院橡胶研究所开放课题(No.RRI-KLOF202204). （No.RRI-KLOF202204）
