...
  • 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 >A simple model for water level and stratification in Ringkobing Fjord, a shallow, artificial estuary
【24h】

A simple model for water level and stratification in Ringkobing Fjord, a shallow, artificial estuary

机译：Ringkobing峡湾（一个浅水人工河口）的水位和分层的简单模型

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

Ringkobing Fjord is a shallow estuary connected to the North Sea through a canal and a sluice. A simple model is presented with which the water level and the stratification in the estuary may be calculated from observations of wind, input of freshwater, water level in the North Sea, and data for the operation of the sluice. Two main components are the use of open-channel, hydraulic theories to determine the exchange through the canal and sluice and a potential energy concept to calculate the vertical mixing. One major simplifying assumption is to disregard the baroclinic dynamics, which works well except in case of weak or strong winds. The model is run for 1999, and the results compare reasonably well with observations of water levels and salinity profiles at several locations. The primary objectives of the model are to be able to estimate, as a function of the operational practice of the sluice, a) the salinity of the main body of water and b) the amounts and the lives of the intermittently inflowing volumes of seawater, which could lead to oxygen depletion in the deep parts of the estuary due to eutrophication. This is demonstrated in a period in September 1999 during which a volume of seawater is first admitted to the estuary and then gradually eroded, while the oxygen in it is rapidly consumed. The present model provides an efficient and computationally inexpensive tool to study some estuarine properties, other alternatives being three-dimensional models of high spatial and temporal resolution and complex turbulence description. The hydraulic part of the model, describing the flow through the canal and sluice, can be modified, and so the model can be adapted to other estuaries that are characterized by a large degree of horizontal homogeneity and a well-defined connection to the sea.
机译：Ringkobing峡湾是一条浅河口，通过一条运河和水闸与北海相连。提出了一个简单的模型，利用该模型可以根据风的观测，淡水的输入，北海的水位以及水闸的运行数据来计算河口的水位和分层。两个主要组成部分是使用明渠水力理论来确定通过水渠和水闸的交换，以及使用势能概念来计算垂直混合。一个主要的简化假设是忽略斜压动力学，除非在弱风或强风的情况下，否则斜压动力学效果很好。该模型运行于1999年，其结果与几个地点的水位和盐度剖面的观测值相当吻合。该模型的主要目标是根据水闸的运行方式估算：a）水主体的盐度和b）间歇性流入的海水量和寿命，这可能会因富营养化而导致河口深处的氧气耗竭。这在1999年9月的一段时间中得到了证明，在此期间，大量海水首先进入河口，然后逐渐被侵蚀，而其中的氧气被迅速消耗掉。本模型提供了一种有效且计算便宜的工具来研究某些河口特性，其他选择是具有高时空分辨率和复杂湍流描述的三维模型。可以修改描述通过运河和水闸的水流的模型的水力部分，因此该模型可以适应其他具有高度水平同质性和与海的明确连接特征的河口。

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