Estimation of soil moisture conditions with Landsat TM in Guangzhou
As useful indicators for land surface characteristics,Land Surface Temperature (LST) and Normal Different Vegetation Index (NDVI) can provide information on vegetation and moisture conditions at the surface.In this study,Qins monowindow algorithm and Temperature-Vegetation Dryness Index (TVDI) were employed to study LST and soil moisture conditions in Guangzhou.Landsat TM image dated on November 23,2005 was used to retrieve the LST and TVDI.A geospatial model was designed and processed for getting LST and soil moisture status.The result images reveal that,the areas with high land surface temperatures mainly appeared in the centers of urban.On 23 November,2005,areas with high land surface temperatures took up 26.15％,while urban heat island areas with higher land surface temperatures took up 11.6％ in Guangzhou.Except water and urban or built-up land,humid and normal areas took up 22.05％,slight drought areas took up 60.75％,drought areas took up 17.01％,and heavy drought areas took up 0.16％.Compare to the real status of soil moisture,the result indicate that the TVDI index can provide a powerful tool to assess the soil moisture conditions for large scale areas in Guangzhou.
Land Surface Temperature Soil moisture Landsat TM NDVI
Q.Sun J.Tan S.Chen
Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,P.R.China;Graduate Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,P.R.China Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,P.R.China;Naval Aca
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）