Abstract
The distribution of heavy metals and organic matter in the bottom sediment of Lake Nakanoumi was observed. Sampling was carried out at sixty stations in a netwark form in Lake Nakanoumi. Sediment quality data of each sample were determined for fifty-five items (Heavy metals and Organic matter).
Many heavy metals (Co, Cr, Pb and Zn) concentration in the bottom sediments (0-3cm) were high at the stations, where domestic wastes are inflow.
And then, sediment quality data were analysed by the Principal Component Analysis (PCA) method. About 73% of total variance of the original data were contributed to the three components (Z1, Z2 and Z3) by PCA method.
