期刊文献+

Estimating evapotranspiration from terrestrial groundwater-dependent ecosystems using Landsat images 被引量:2

原文传递
导出
摘要 Understanding and mitigating against the impact of groundwater extraction on groundwater-dependent ecosystems(GDE)requires information of evapotranspiration(ET)of these ecosystems.In this pilot study,we tested two remotesensing methods,Surface Energy Balance Algorithms for Land(SEBAL)and Vegetation Index/Temperature Trapezoid(VITT),for ET estimation from terrestrial GDEs.Multi-temporal Landsat Thematic Mapper(TM)and Enhanced Thematic Mapper(ETM)images were used to derive vegetation indices and land surface temperatures for ET estimation.Radiative transfer model was used for atmospheric correction of the Landsat images.Field measurements were used to validate the remote sensing estimation of VI and surface temperature.Both methods have been implemented in a geographic information system(GIS)using automated scripts and ancillary GIS data for quality control process.Comparison of predicted ET by SEBAL to VITT model indicates relatively good agreement(R20.90)and promise for use in groundwater management.The average ET from woodland GDEs within the zone of influence of the pumping stations is in general lower than similar woodlands outside of the pumping area,particularly in summer seasons which demonstrates that the pumping regime has an impact on those GDEs.The study also demonstrates that even a simple physical ET model can provide useful information for groundwater management,and more broadly other applications in hydrologic modelling and digital earth studies.
出处 《International Journal of Digital Earth》 SCIE 2011年第2期154-170,共17页 国际数字地球学报(英文)
基金 This project was funded by the GDE project from the NSW Government. Many DECCWstaff helped and supported this project.
  • 相关文献

同被引文献25

引证文献2

二级引证文献22

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部