Fluorescence spectroscopic characterization of dissolved organic matter in the waters of Lake Fuxian and adjacent rivers in Yunnan, China

The fluorescence properties of dissolved organic matter (DOM) in the water of Lake Fuxian and its adjacent rivers on the Yunnan Plateau, southwestern China, were studied to specify the characterization of DOM in the lake and river waters. The fluorescence properties with the excitation–emission matrix in the water of Lake Fuxian are different from those in the river water. The differences in these properties between the lake and river water could arise not only from their sources but also from the reactivity of the photobleaching of DOM. In the lake, the supplying of allochthonous fluorescent materials from inflowing rivers to the fluorescent DOM is less significant than the photobleaching of fluorescent substances.