chart datum level

简明释义

海图基准面海图基准线

英英释义

例句

1.Boaters should always check the chart datum level before setting out to avoid running aground.

船员在出发前应始终检查图表基准水位，以避免搁浅。

2.During the survey, they found that the water level was below the chart datum level during low tide.

在测量过程中，他们发现低潮时水位低于图表基准水位。

3.The marina's depth was measured against the chart datum level to ensure safe navigation.

码头的深度是相对于图表基准水位进行测量的，以确保安全航行。

4.It is crucial for pilots to know the chart datum level when planning their flights over water.

飞行员在规划水上飞行时，了解图表基准水位是至关重要的。

5.The construction project was designed with respect to the chart datum level to prevent flooding.

该建筑项目是根据图表基准水位进行设计的，以防止洪水。

作文

Understanding the concept of chart datum level is crucial for anyone involved in maritime navigation or coastal engineering. The term refers to a reference point used in nautical charts and maps to indicate water depth. Essentially, it serves as a baseline from which depths are measured, allowing sailors and engineers to assess the underwater topography accurately. In simpler terms, the chart datum level can be thought of as the 'zero point' for measuring water levels, ensuring that all depth readings are consistent and reliable. In maritime navigation, the chart datum level plays a vital role in ensuring safe passage for vessels. For example, if a ship is navigating through shallow waters, understanding the chart datum level helps the crew determine whether the vessel can safely pass without running aground. This is particularly important in areas where tidal changes can significantly affect water levels. Without a clear understanding of the chart datum level, navigators could mistakenly believe that there is enough water beneath their keel, leading to dangerous situations.Moreover, the chart datum level is not static; it can change based on various factors such as tides, weather conditions, and geological shifts. Different regions may use different chart datum levels, which means that a sailor must be aware of the specific datum used in the area they are navigating. For instance, in some places, the reference point might be the average low tide, while in others, it could be the mean sea level. This variability underscores the importance of local knowledge and the need for accurate mapping data.In coastal engineering, the chart datum level is equally significant. Engineers rely on this reference point when designing structures such as docks, piers, and seawalls. By using the chart datum level, they can ensure that these structures are built at appropriate elevations to withstand tidal fluctuations and potential flooding. If an engineer fails to account for the chart datum level, the consequences could be detrimental, leading to structural failures or increased vulnerability to storm surges.Additionally, environmental monitoring efforts often utilize the chart datum level to assess changes in coastal ecosystems. For instance, researchers studying erosion or sediment deposition need to know the baseline water levels to evaluate how these processes are affecting the shoreline over time. By comparing current conditions against the chart datum level, scientists can gain insights into the health of marine environments and make informed decisions about conservation efforts.In conclusion, the chart datum level is a fundamental concept in both maritime navigation and coastal engineering. It acts as a critical reference point that ensures safety, supports infrastructure development, and aids in environmental monitoring. A thorough understanding of the chart datum level is essential for professionals in these fields, as it directly impacts their ability to navigate, design, and protect our coastal and marine resources effectively. As such, continued education and awareness about the chart datum level will contribute to safer and more sustainable practices in maritime activities and coastal management.

理解图表基准水平的概念对于任何参与海洋导航或沿海工程的人来说都是至关重要的。该术语指的是在航海图和地图中用于指示水深的参考点。基本上，它作为一个基线，从中测量深度，使水手和工程师能够准确评估水下地形。简单来说，图表基准水平可以被视为测量水位的“零点”，确保所有深度读数的一致性和可靠性。在海洋导航中，图表基准水平在确保船只安全通过方面发挥着重要作用。例如，如果一艘船正在经过浅水区，了解图表基准水平可以帮助船员判断船只是否可以安全通过而不搁浅。这在潮汐变化会显著影响水位的地区尤其重要。如果没有对图表基准水平的清晰理解，导航员可能会错误地认为船底下有足够的水，从而导致危险情况。此外，图表基准水平并不是静态的；它可能根据潮汐、天气条件和地质变化等各种因素而变化。不同的地区可能使用不同的图表基准水平，这意味着水手必须了解他们导航区域使用的特定基准。例如，在某些地方，参考点可能是平均低潮，而在其他地方，则可能是平均海平面。这种变异性强调了地方知识的重要性以及准确制图数据的必要性。在沿海工程中，图表基准水平同样重要。工程师在设计码头、栈桥和海堤等结构时依赖于这个参考点。通过使用图表基准水平，他们可以确保这些结构在适当的高度建造，以承受潮汐波动和潜在的洪水。如果工程师未能考虑到图表基准水平，后果可能是灾难性的，导致结构失败或对风暴潮的易损性增加。此外，环境监测工作通常利用图表基准水平来评估沿海生态系统的变化。例如，研究侵蚀或沉积物沉积的研究人员需要知道基线水位，以评估这些过程如何随时间影响海岸线。通过将当前条件与图表基准水平进行比较，科学家可以深入了解海洋环境的健康状况，并就保护工作做出明智的决策。总之，图表基准水平是海洋导航和沿海工程中的一个基本概念。它充当一个关键的参考点，确保安全，支持基础设施发展，并有助于环境监测。彻底理解图表基准水平对于这些领域的专业人士至关重要，因为它直接影响他们有效导航、设计和保护我们的沿海和海洋资源的能力。因此，关于图表基准水平的持续教育和意识将有助于在海洋活动和沿海管理中促进更安全和更可持续的实践。