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通过创建更准确的波浪建模来实现防洪

4分钟阅读


客户类型:水电和海洋学咨询公司

行业:Hydrology

应用:长期波动式测量

Solution:Druck的Unik5000压力传感平台

荷兰洪水国防当局在规划堤防的身高和建筑风格方面遇到困难,以防止以最低成本泛滥,因为它在暴风雨条件下没有准确的海洋行为数据。

客户的挑战

The Wadden Sea and in particular the Eems-Dollard estuary, in the Netherlands, is a complex marine environment. This is due to numerous islands, tidal channels and the funnel form of the Ems-Dollard. Combined with local winds, these elements have unusual effects on the water levels and waves and pose a challenge to existing prediction models. Druck’s customer needed a solution for measuring the storms and wave overtopping in order to improve the existing predicting models. Located in the dykes, the wave overtopping tanks collects accurate data on wave and tidal surge, to develop year on year understanding of sea level with the aim of ensuring citizens stay safe as the threat of disasters resulting from global warming endures. These models are used to set the strength and height of the dykes so improved models can reduce the risk of damage to the Dutch coast whilst minimising the cost.

这项工作所需的传感器面临着一个海洋环境,该海洋环境被冷海水交替淹没,并暴露于各种大气条件。传感器位于偏远位置,通过GSM传输数据,并提供太阳能电池板和电池提供的电源。每个水箱中的水深度相对较低,约1 m等于100 mbar。

Druck的解决方案

To carry out the long-term measurements of the effect of storms, two ‘wave transfer bins’ are installed one above the other at key locations on the dyke. Waves wash up the dyke, partially filling the bins. Sensors are then used to measure the amount of water in the bins and the rate at which the water flows out of the bins. This tells the scientists how the waves are behaving.

Druck团队从我们的Unik5000系列中选择了每个站点上所有4个位置的优化解决方案。考虑的项目包括;测量范围,准确性,响应速度,材料兼容性,功耗,入口保护,电气输出和价格。

选定的第一个传感器是Unik5000零件号PDCR5031。该传感器安装在离岸深度,并检测到流入监视箱的波浪。当波进入储罐时,该传感器将打开系统的其余部分,包括其他传感器和数据记录器。

对于Dyke A Unik 5700中的储罐级传感器,选择了零件号PTX57N2。其中四个是安装的,每个储罐中有两个。它们用于测量水高,这与向储罐中的波浪悬挂在一起有关。

储罐中的第二个传感器测量了海水如何通过校准流通道从水箱中流出。同样,这次指定了一个Unik 5700,零件号PTX57N2,并指定了稍高的压力范围。

Druck建议客户添加晴雨表,以便他们可以将条件与当地大气压力联系起来。决定了另外一个Unik5000,零件号PDCR5021具有750至1150 MBAR气压范围,以提供经济的气压计。在海水深度,波高,储罐深度,出口流量和气压压力中,Druck的客户能够建立更好的风暴预测模型,并提供趋势分析。

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图片1:Druck的Unik5000压力传感平台
Druck的附加价值

Druck从具有良好稳定性的传感器中提供了适当的准确性解决方案,该传感器可以从同一供应商那里获得多年的数据收集,并具有低廉的所有权数据收集。

The different models were selected for different reasons:

  • 选择了两个传感器输出,即离岸控制传感器的MV输出,晴雨表可以使用更少的能量。在这些位置,传感器已永久(在海上位置以快速的采样速率运行)。
  • 低功率传感器减少了对大型昂贵太阳能电池板的需求。储罐传感器的MA输出使得非常准确的读数可以在长时间的电缆运行中保持。
  • Injection moulded fully submersible cables were chosen for obvious reasons except for the Barometer where a more standard lower cost cable was selected.
  • 为不同的应用程序选择了不同的压力范围,以平衡高分辨率数据的需求与防止损害过压力的保护。
  • Titanium construction was offered to avoid corrosion in the locations where alternate sea-water and air are present as the waves move naturally.

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