...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean & coastal management >Towards predicting the influence of freshwater abstractions on the hydrodynamics and sediment transport of a small, strongly tidal estuary: The Devonshire Avon
【24h】

Towards predicting the influence of freshwater abstractions on the hydrodynamics and sediment transport of a small, strongly tidal estuary: The Devonshire Avon

机译：预测淡水抽取对一个小潮汐河口的水动力和泥沙迁移的影响：德文郡雅芳

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

Management strategies for freshwater drainage basins often do not take into account the effects of human interventions (such as water abstractions, i.e. water extractions) on their receiving estuaries (e.g. EA, 2007; Wolanski et al., 2004). However, it is necessary to know how such interventions are likely to influence estuarine hydrodynamics and sediment transport processes in order to then assess important management aspects such as the likely effects to an estuary's ecology and sedimentation; for example, potential accretion and dredging requirements. Following Schuttelaars et al. (2013) we consider a tiered approach, but in which simplistic models (rather than analytical models) are used initially to determine whether modelling of greater complexity, effort and expense is required to assess the intervention. To this end, we have linked a section-averaged, along-estuary hydrodynamic and salt-balance model with a depth-averaged, across-estuary hydrodynamic model to simulate currents and tidal behaviour that can be used in a sediment-transport model to investigate, as a first step, intervention scenarios for shallow, strongly tidal estuaries quickly, easily and at low cost. The essential element is a sensitivity analysis in which simulations for before-and-after intervention scenarios are compared and percentage differences tabulated. The methodology is applied to the predicted consequences on the hydrodynamics and sediment transport in the Devonshire Avon Estuary, UK, of water abstractions due to an up-stream dam and reservoir. Although the freshwater abstractions generally are small, the results nevertheless indicate an increased potential for up-estuary transport and retention of sediment in the central and upper reaches of the estuary.
机译：淡水流域的管理策略通常没有考虑到人类干预措施（例如取水，即取水）对其接收河口的影响（例如EA，2007; Wolanski et al。，2004）。但是，有必要知道这样的干预将如何影响河口的水动力和泥沙输送过程，以便随后评估重要的管理方面，例如对河口生态和沉积的可能影响；例如，潜在的增加和疏requirements要求。继Schuttelaars等。 （2013年），我们考虑了一种分层方法，但首先使用简化模型（而不是分析模型）来确定是否需要更大复杂性，工作量和费用的建模来评估干预措施。为此，我们将断面平均的沿河口水动力和盐分平衡模型与深度平均的跨河口水动力模型相链接，以模拟可用于泥沙输送模型中的潮流和潮汐行为，以研究第一步，快速，轻松，低成本地对潮汐强烈的浅海口进行干预。基本要素是敏感性分析，在该敏感性分析中，比较了干预前后的模拟情况并列出了百分比差异。该方法适用于英国的德文郡雅芳河口因上游水坝和水库引起的取水对水动力和泥沙输送的预期后果。尽管淡水抽取量通常很小，但是结果表明，河口中部和上游的河口向上运输和沉积物滞留的潜力增加。

著录项

  • 来源
    《Ocean & coastal management》 |2013年第7期|83-96|共14页
  • 作者

    R.J. Uncles; J.A. Stephens; C. Harris;

  • 作者单位

    Plymouth Marine Laboratory, Plymouth, Devon PL1 3DH, UK;

    Plymouth Marine Laboratory, Plymouth, Devon PL1 3DH, UK;

    Plymouth Marine Laboratory, Plymouth, Devon PL1 3DH, UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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