Thomas Séverine, Ridd Peter V, Day Geoff
School of Mathematical and Physical Sciences, James Cook University, Townsville, Qld 4811, Australia.
Mar Pollut Bull. 2003 Aug;46(8):1006-14. doi: 10.1016/S0025-326X(03)00122-X.
An extensive sediment transport survey took place at Lihir Island (Papua New Guinea), where mining operations involve disposal of waste rocks and soil in nearshore waters. To investigate the potential impact of these practices over neighbouring fringing reefs, turbidity and sediment accumulation were measured continuously for extended periods. Turbidity records provided a map of observed impact zones based on turbidity thresholds. The main zoning features were (a) that an extreme turbidity gradient persists between the inner harbour (turbidity levels of 100-1000 mg l(-1)) and the adjacent reefs (turbidity levels in the order of 10 mg l(-1)), and (b) that observed zones conform with pre-operations impact predictions. Accumulation measurements unveiled no significant sediment accumulation over fringing coral reefs. This study contributes to the understanding of the potential impact of sediment discharge to nearshore waters.
在利希尔岛（巴布亚新几内亚）进行了一项广泛的沉积物输运调查，该岛的采矿作业涉及在近岸水域处置废石和土壤。为了调查这些作业对邻近岸礁的潜在影响，对浊度和沉积物堆积进行了长期连续测量。浊度记录基于浊度阈值提供了观测到的影响区域图。主要分区特征为：（a）内港（浊度水平为100 - 1000毫克/升）与相邻珊瑚礁（浊度水平约为10毫克/升）之间存在极端的浊度梯度；（b）观测区域与作业前的影响预测相符。堆积测量结果表明，岸礁上没有明显的沉积物堆积。这项研究有助于了解沉积物排放到近岸水域的潜在影响。
