摘要
【目的】基于遥感技术和气象资料建立准确的灌区高分辨率蒸散发量评估方法。【方法】采用SEBS模型,结合Landsat-8遥感数据和田间采样数据,模拟蒸散发量空间分布。【结果】①归一化植被指数(R^(2)=0.6448)、地表比辐射率(R^(2)=0.6377)和地表温度(R^(2)=0.5583)与土壤盐分量之间的拟合度较高,地表反照率(R^(2)=0.1986)与土壤盐分量之间的拟合度较低。②玛纳斯河流域日蒸散发量平均值为3.866 mm,蒸散发量由南部灌区向北部戈壁地区递减。③蒸散发量小于3.60 mm/d时,非盐渍土和轻度盐渍土占主导地位;蒸散发量介于3.60~4.05 mm/d时,中度盐渍土达到峰值;蒸散发量介于大于4.05 mm/d时,重度盐渍土与盐土占比显著增多。【结论】SEBS模型利用遥感卫星影像等数据可以得到准确的高空间分辨率地表实际蒸散发量估算结果,且在玛纳斯河流域与土壤盐渍程度呈正相关。
【Objective】Evaluating evapotranspiration and soil salinization is critical for soil and water management but challen ging on large scales.This paper investigates the feasibility of using remote sensing technologies and meteorological data to estimate evapotranspiration and soil salinization in irrigated areas.【Method】The study was conducted in the Manasi River Basin in Northeastern China.It was based on the Surface Energy Balance System(SEBS)model,using the Landsat-8 remote sensing data and field sampling to estimate spatial distribution of both evapotranspiration and soil salinity in the studied area.【Result】①The n ormalized vegetation index(R^(2)=0.6448),surface specific emissivity(R^(2)=0.6377),and surface temperature(R^(2)=0.5583)all showed a strong correlation with soil salinity,while surface albedo(R^(2)=0.1986)had a weaker correlation with soil salinity.②Daily evapotranspiration(ET)in the Manasi River Basin ran ged from 0.024 to 5.403 mm,with an average of 3.866 mm.ET decreased from the Southern irrigation area to the Northern Gobi region.③ET values le ss than 3.60 mm/d were associated with non-saline and moderate saline soils.For areas with ET between 3.60 mm/d and 4.05 mm/d,moderate soil salinity dominated.For areas with ET exceeding 4.05 mm/d,the proportion of severe soil salinity increased signif icantly.【Conclusion】U sing remotely sensed satellite imagery,the SEBS model provides an accurate,high-resolution estimate of evapotranspiration in terrestrial systems.The evapotranspiration was positively correlated with soil salinity in the Manasi River Basin.These results can help improve land and water management in the region.
作者
彭梓程
杨小虎
杨海昌
张凤华
林伟平
李娟
李海耀
PENG Zicheng;YANG Xiaohu;YANG Haichang;ZHANG Fenghua;LIN Weiping;LI Juan;LI Haiyao(Shihezi University,Shihezi 832003,China;Karamay Lvcheng Agricultural Development Limited Liability Company,Karamay 834099,China)
出处
《灌溉排水学报》
CAS
CSCD
2024年第12期106-112,共7页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(42167036)
兵团科技计划项目(2022ZD055)
石河子大学国际科技合作项目(GJHZ202304)。
关键词
SEBS模型
遥感
干旱区
蒸散发
土壤盐分
SEBS model
remote sensing
arid region
evapotranspiration
so il salinity
作者简介
彭梓程(2000-),男。硕士研究生,主要从事农业资源与环境的相关研究。E-mail:1175906388@qq.com;通信作者:杨海昌(1990-),男。副教授,主要从事绿洲生态与农业资。
