Soil concentration reverse method based on special spectral position

Soil is an important parameter on water quality, and plays a key role in water quality evaluation, especially for inland water. Many remote-sensing methods have now been developed to reverse soil concentration. However, in natural water, the existence of chlorophyll-a affects the soil concentration reverse precision. In order to remove the effect of chlorophyll-a, an experiment is designed in this work to study the water spectra with different soil concentrations and one chlorophyll-a concentration. A reverse method is developed through analyzing shifts and changes of characteristic spectral positions. It is based on special spectral positions where the influence of algae is the least.