Sediment capture and deposition processes in coastal lagoons

间歇性关闭和开放的泻湖和湖泊是澳大利亚沿海管理人员面临的一个日益严重的问题：它们可能限制鱼类洄游，导致水质恶化和洪水风险增加。例如，默里河口在1981年关闭，现在仍然处于拥挤状态。关闭将对整个地区，特别是库龙河造成灾难性后果，对澳大利亚的环境声誉造成重大损害。在河口进行优化的疏浚作业（目前每年耗资460万美元），加上更好地管理河流排放，将有可能改善该地区的状况。

Intermittently closed and open lagoons and lakes are an increasing problem for coastal managers around Australia: they can limit fish migration, and lead to degraded water quality and an increased risk of flooding. The Murray mouth, for example, closed in 1981 and still exists in a congested state. Closure would have disastrous consequences for the area in general and the Coorong in particular, with significant damage to Australia's environmental reputation. An optimised dredging operation at the mouth (currently costing $4.6 m annually), together with better management of river discharges, will have the potential to improve conditions in the area.