...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >The dynamic behaviour of a river-dominated tidal inlet, River Murray, Australia
【24h】

The dynamic behaviour of a river-dominated tidal inlet, River Murray, Australia

机译：河流为主的潮汐入口的动态行为，澳大利亚墨累河

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Australia's largest river, the River Murray, discharges to the southern ocean through a coastal lagoon and river-dominated tidal inlet. Increased water extractions upstream for irrigation have led to significantly reduced flows at the mouth and, as a result, the area is undergoing rapid change, particularly with regard to the rate at which sediment is being transported into the lagoon. Based on detailed and accurate bathymetric surveys it has been possible to estimate that the rate of lagoon in-filling is of the order of 100,000 m~3 per year for the period June 2000 to May 2003, although the actual rate shows significant year to year variability. Dredging of the lagoon commenced in 2000 in an attempt to reverse the trend. In an effort to understand the behaviour of the inlet a one-dimensional numerical model of the inlet has been developed The model extends the original of van de Kreeke by including a dynamic inlet throat area based on predicted river flows and a sediment transport module to predict the resulting net sediment transport. Comparisons with water level data collected on both the ocean and lagoon sides of the mouth have shown that the model is able to predict the attenuation and lag of the tidal signal reasonably well. The sediment transport model was based on predicted sediment concentrations in the surf zone and was found to predict the rate of sediment in-filling to an acceptable level of accuracy. It is envisaged that the model will be a useful management tool, especially since it is possible to manipulate river discharges to the mouth.
机译：澳大利亚最大的河流墨累河通过沿海泻湖和以河流为主导的潮汐流向南部海洋排放。上游增加的灌溉用水量导致河口的水流量大大减少，结果，该地区正在发生快速变化，特别是在沉积物被输送到泻湖的速度方面。根据详细而准确的水深测量，尽管实际的年比年增长率很高，但有可能估计在2000年6月至2003年5月期间，泻湖的年填充率约为100,000 m〜3。变化性。泻湖于2000年开始疏in，以扭转这一趋势。为了理解入口的行为，已经开发了入口的一维数值模型。该模型通过包括基于预测的河流流量的动态入口喉面积和用于预测的泥沙输送模块，扩展了van de Kreeke的原始模型。产生的净泥沙输送量。与在海洋的海洋和泻湖两边收集的水位数据的比较表明，该模型能够合理地预测潮汐信号的衰减和滞后。泥沙运移模型基于冲浪区中预计的泥沙浓度，并被发现可以将泥沙填充速率预测到可接受的精度水平。可以设想该模型将是一个有用的管理工具，尤其是因为可以操纵流向河口的河流。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号