[OPTICAL REVIEW Vol. 20, No. 6 (2013) 509-512]
© 2013 The Japan Society of Applied Physics

Empirical Relationship among Wavelength, Reflectance, and Concentration of Suspended Particulate Matter in Water Based on a Laboratory Experiment

Yingcheng LU1,2*, Weixian QIAN3, Chunguang LYU2, Qingjiu TIAN2, Dongming LU3, and Shaojie SUN2

1Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210093, China
2International Institute for Earth System Science, Nanjing University, Nanjing 210093, China
3Lab 404, EEOT, Nanjing University of Science and Technology, Nanjing 210094, China

(Received June 14, 2013; Revised August 9, 2013; Accepted September 19, 2013)

A laboratory experiment was designed to collect the spectral reflectance of water containing suspended particulate matter (SPM) in terms of its concentration. By performing surface-fitting analysis, an empirical relationship among the wavelength, reflectance, and concentration of SPM in water was obtained. The results showed that a linear effect of the spectral wavelength on spectral reflectance with increasing concentration of SPM in water, and the relationship between the reflectance and concentration of SPM in water is quadratic. Hyperspectral remote sensing is expected to play an important role in estimating the concentration of SPM in water.

Key words: spectrum, optical remote sensing, suspended particulate matter, spectral response

*E-mail address: luyc.nju@gmail.com