Quantitative Retrieval of Tidal Flat Moisture Based on TM Images

Abstract:

Based on spectrometry, the remote sensing inversion researches of the surface tidal flat moisture are conducted in combination with spectral values measured in the field and moisture measured in the laboratory. Firstly, the remote sensing images are preprocessed, including geometric correction, atmospheric correction and image enhancement. Then, the spectral characteristics of typical ground objects are analyzed to partition the whole image and separate the bare tidal flats. At last, TM5 wave band and exponential model are determined to be the best wave band and optimal model for the inversion of the bare tidal flat moisture. The experiment shows: (1)This method can help to improve the accuracy of the surface tidal flat moisture inversion, with the maximum error of moisture inversion is 3%, the relative error is 7.1% and the average relative error is 6.5%. (2)The surface tidal flat moisture is of evident gradient distribution features, which can be used as basis of tidal flat topographic survey.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 1066-1071
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.1066
• Online since: October 2013
• Authors: Li Jun Yang, Ming Fei Wu, Yun Hong Zhu
• Keywords: Exponential Model, Remote Sensing, Soil Water Content, Tidal Flat

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