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Evapotranspiration estimation considering anthropogenic heat based on remote sensing in urban area

Science china Earth Sciences 2017年第4期60卷 659-671页

作者： CONG ZhenTao SHEN QiNing ZHOU Lin SUN Ting LIU JiaHong State Key Laboratory of Hydro-Science and Engineering Department of Hydraulic Engineering Tsinghua University Beijing 100084 China Sanjiangyuan Collaborative Innovation Center Tsinghua University Beijing 100084 China China Institute of water Resources and Hydropower Research Beijing 100038 China

Urbanization influences hydrologic cycle significantly on local,regional even global *** urbanization the water resources demand for dense population sharpened,thus it is a great challenge to ensure water supply for some metropolises such as *** area is traditionally considered as the area with lower evapotranspiration(ET) on account of the impervious surface and the lower wind *** most remote sensing models,the ET,defined as latent heat in energy budget,is estimated as the difference between net radiation and sensible *** sensible heat is generally higher in urban area due to the high surface temperature caused by heat island,therefore the latent heat(*** ET) in urban area is lower than that in other *** estimated water consumption from 2003 to 2012 in Beijing based on water balance method and found that the annual mean ET in urban area was about 654 ***,using Surface Energy Balance system(SEBS) model,the annual mean ET in urban area was only 348 *** attributed this inconsistence to the impact of anthropogenic heat and quantified this impact on the basis of the night-light ***,a new model SEBS-Urban,coupling SEBS model and anthropogenic heat was developed to estimate the ET in urban *** ET in urban area of Beijing estimated by SEBS-Urban showed a good agreement with the ET from water balance *** findings from this study highlighted that anthropogenic heat should be included in the surface energy budget for a highly urbanized area.

关键词： sponge city waterlogging integrated water system approach opportunities and challenges china

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