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《Scientia Geographica Sinica》 2009-03
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Study on Model of Surface Sediment Humidity on Tidal Flat Based on Remote Sensing Image of TM——A Case Study of Radial Sands Banks in Jiangsu Province,China

SHEN Yong-ming1,YANG Jing-song2,ZHANG Ren-shun3,LIU Yong-mei1 (1.School of Geography Science,Nanjing Xiaozhuang University,Nanjing,Jiangsu 211171;2.Institute of Soil Science,Chinese Academy of Sciences,Nanjing,Jiangsu 210008;3.Research Institute of Ocean & Coatstal Wetland Science,Nanjing Normal University,Nanjing,Jiangsu 210097)  
Surface sediment humidity of the tidal flat reflects the periodicity action of the tide,and it is connected closely with the elevation of the tidal flat.The remote sensing image of TM can show the surface sediment humidity fairly,so the elevation of the tidal flat can be deduced by the remote sensing image of TM,and it is very important to know the elevation of the tidal flat in studying the sands movement and using the tidal flat resources which can not be measured easily by traditional method because of the poor topographical environment.In this study,the main purpose is to find the relationship between the surface sediment humidity of the tidal flat and the data of the remote sensing image of TM with the case of the Radial Sands Banks in Jiangsu Province,China.The two sections were selected,which can represent the Radial Sands Banks nearly,one is near Xiaoyangkou,the other is on Tiaozini sands,and the surface sediment samplings of the two sections were collected when the tidal period were equivalent to the moment of the TM remote sensing image taken,and the sediment humidity were measured.Then the data in the remote sensing image of TM corresponding to the surface sediment sampling point were collected,and the transforming method to the remote sensing image were carried out,and the relativity coefficients were calculated between the humidity of the surface sediment samplings and the the light value of the remote sensing image of TM after the transforming.The results of correlation coefficients were compared with each other,and the highest correlation coefficient was selected,which was the first component after the principal component analysis of the 2,3 and 4 wave band.After that,Fourier transform,filter the waves and the contrary Fourier transform was taken to the first component after the principal component analysis,the result show that the correlation coefficients between the surface sediment humidity and the image data is high.At last,surface sediment humidity by the remote sensing image of TM was calculated,which has high coefficient of determination,and the result can be used easily for calculating surface sediment humidity of the radial sands banks.
【Fund】: 国家自然科学基金(编号:40401059)项目“青蓝工程”项目资助
【CateGory Index】: TP751
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