Abstract
This study was aimed to discuss the phosphorucs omposition of sediments in Inohana Lake, which was a branch lake of Hamana Lake.It wase xpected that the sediment was influenced from riverine suspended solid and influent from Hamana Lake. The riverine suspended solid samples were collected at a major influx river to Inohana Lake during a rain event and low flow period. The bottom sediment samples were gathered at ten points in the lake. Sequential phosphorus extraction techniques was applied to our all collected samples. Extracted microorganism-P much contained the sediment samples of the coastal area, and riverine suspended solid samples. It suggested that riverine particulate phosphorus sedimeted on the coastal area. Non-extractable-P was increased in the offshore points. It suggested that particulate phosphorus changed in quality in anoxic sediment. Phosphorus concentration of interstitial water in sediment was also increased in offshore anaerobic sediment.
