Experimental study on reflected spectrum and estimating amount of suspended sediment

Several suspended sediment inversion models were constructed by experimental study on reflected spectrum of suspended sediment with different concentration.The results show that:(1) The numerical relationship between the spectrum reflectance and suspended sediment concentration is established,which is the basis for the suspended sediment concentration retrieval by satellite remote sensing.(2)The range of the sensitive bands for suspended sediment water are from 600nm to 720nm and 800nm to 850nm.(3)The model constructed by the ways of principal component analysis combined with the multivariate linear regression(MPCAR) allows the amount of suspended sediment to be retrieved at a relatively high accuracy.The MPCAR is more accurate than the linear model of sensitive bands(LMSB),The MPCAR can retrieve the suspended sediment in the concentration range of 0.1905g/L～3.6991g/L with high precise and the mean relative error between the measured and retrieved value is only about 5%.(4) The experimental spectrum measurement of suspended sediment water with different concentration ensures to acquire the synchronous and high accurate data.