Environment Department, Ok Tedi Mining Limited, P.O. Box 1 Tabubil, Western Province, Papua New Guinea.
Environ Monit Assess. 1991 Jul;18(1):41-68. doi: 10.1007/BF00394477.
The Ok Tedi copper mine discharges overburden and ore residues into the Ok Tedi, a tributary of the Fly River. These discharges result in elevated suspended solids and dissolved and particulate associated copper. Analyses of covariance were performed to establish statistical model of the relationships between the mine discharges and fish catches between 1983 and 1988. These models were then extrapolated to predict the affects of future mine discharges on fish catches. The models predicted that if the observed effects were caused by particulate associated copper, the period of greatest impact will be between 1989 and 1993, following which catches should be close to 1988 levels for the remainder of mine life. Some additional catches not included in the data set used to derive the models were found to fit the model predictions well. As the predicted period of greatest impact is short and most species reproduce away from the river channel, the ability of the fish communities to undergo partial recovery after 1991 should be maintained.
奥克泰迪铜矿将废石和矿石残渣排入弗莱河的一条支流奥克泰迪河中。这些排放物导致悬浮固体以及溶解态和颗粒态相关铜含量升高。进行了协方差分析，以建立 1983 年至 1988 年期间矿山排放物与鱼类捕捞量之间的统计模型关系。然后将这些模型外推以预测未来矿山排放物对鱼类捕捞量的影响。这些模型预测，如果观察到的影响是由颗粒态相关铜引起的，那么最大影响期将在 1989 年至 1993 年之间，之后，在矿山寿命的剩余时间里，捕捞量应接近 1988 年的水平。一些未包含在用于推导模型的数据集中的额外捕捞量发现与模型预测拟合得很好。由于预测的最大影响期较短，而且大多数鱼类在远离河道的地方繁殖，因此鱼类群落应该能够在 1991 年后部分恢复。
