headward

简明释义

英[ˈhedwəd]美[ˈhedwərd]

adj. 朝头部的；向头的

adv. 向头

英英释义

单词用法

同义词

反义词

例句

1.The article was discussed that national standard samples acted importantly on magnitude headward of air automatic monitoring system.

阐述了国家标准样品在空气自监测系统量值溯源中的重要作用。

2.The change of ephemeral gully headward erosion, gully-wall collapsing and deep-cutting erosion were quantified in the three stages of initial-phase, metaphase and anaphase.

阐明了在浅沟发育初期、中期和后期三个发育阶段，沟头溯源侵蚀、沟壁扩展和沟床下切侵蚀变化规律。

3.The change of ephemeral gully headward erosion, gully-wall collapsing and deep-cutting erosion were quantified in the three stages of initial-phase, metaphase and anaphase.

阐明了在浅沟发育初期、中期和后期三个发育阶段，沟头溯源侵蚀、沟壁扩展和沟床下切侵蚀变化规律。

4.Headward erosion is main cause of river captrue, but it is not only;

溯源侵蚀是河流袭夺的主因，但不是唯一原因；

5.In geology, sediment can be transported headward by erosion.

在地质学中，沉积物可以通过侵蚀向头部运输。

6.The river flows headward toward its source, carving through the landscape.

这条河流向其源头头部流动，雕刻着风景。

7.The research team moved headward during their expedition to study the ancient ruins.

研究小组在考察古代遗址时向头部移动。

8.The trail leads headward into the dense forest, promising adventure ahead.

小径向密林深处头部延伸，预示着即将到来的冒险。

9.As the glacier melted, it retreated headward, revealing new land.

随着冰川融化，它向头部后退，露出了新的土地。

作文

In the study of geography and earth sciences, the term headward refers to the process by which a river or stream erodes its banks and bed in an upstream direction. This phenomenon is particularly significant in understanding the evolution of landscapes and river systems. When a river flows, it typically cuts through the landscape, carving out valleys and creating various geographical features. However, over time, certain sections of the river may begin to erode more rapidly than others, causing the river to extend its reach headward, effectively moving its source further upstream.The headward erosion can occur due to several factors, including increased water flow, changes in sediment load, or the geological composition of the surrounding area. For instance, if a heavy rainfall event occurs, the increased volume of water can lead to a greater erosive force on the riverbanks, prompting the river to advance headward. Similarly, if the river encounters softer rock formations, it may more easily erode these areas, allowing it to push its source further back.This process is not just important for the river itself but also has broader implications for the environment and human activities. As rivers extend headward, they can alter local ecosystems, affecting plant and animal life that depend on stable riverbanks and predictable water levels. Additionally, this change can impact agricultural practices, as farmers rely on the predictability of rivers for irrigation and livestock.Moreover, headward erosion can lead to the formation of new waterways and the reconfiguration of existing ones. This dynamic nature of rivers means that communities must continually adapt to changing watercourses. In some cases, this can lead to conflicts over water rights, especially in regions where water is scarce.Understanding the concept of headward erosion is crucial for environmental scientists and geologists. By studying how rivers advance headward, researchers can better predict future changes in the landscape and develop strategies to mitigate potential negative impacts on communities and ecosystems. For example, in areas prone to flooding, knowing how a river might extend headward can help planners design better flood control measures.In conclusion, the term headward encapsulates a vital concept in geomorphology, illustrating how rivers can shape the landscape over time. The implications of this process extend beyond mere geography, influencing ecological systems, human activities, and resource management. By comprehending the mechanics of headward erosion, we can better appreciate the intricate relationships between water, land, and life, ultimately fostering a deeper respect for the natural world around us.

在地理和地球科学研究中，术语headward指的是河流或溪流向上游方向侵蚀其岸边和河床的过程。这一现象在理解地形和河流系统的演变中尤为重要。当一条河流流动时，它通常会切割地形，雕刻出山谷并创造出各种地理特征。然而，随着时间的推移，河流的某些部分可能会比其他部分侵蚀得更快，导致河流向上游延伸，实际上将其源头推进到更远的上游。Headward侵蚀可能由于多种因素而发生，包括水流量增加、沉积物负荷变化或周围地区的地质组成。例如，如果发生强降雨事件，水量的增加可能会导致河岸受到更大的侵蚀力，从而促使河流向上游推进。类似地，如果河流遇到较软的岩石层，它可能更容易侵蚀这些区域，使其能够将源头进一步推回。这一过程不仅对河流本身重要，还对环境和人类活动产生更广泛的影响。随着河流向上游延伸，它们可以改变当地生态系统，影响依赖稳定河岸和可预测水位的植物和动物生命。此外，这种变化可能会影响农业实践，因为农民依赖河流的可预测性来进行灌溉和养殖。此外，headward侵蚀还可以导致新水道的形成和现有水道的重新配置。河流的这种动态特性意味着社区必须不断适应变化的水道。在某些情况下，这可能导致水权冲突，尤其是在水资源稀缺的地区。理解headward侵蚀的概念对于环境科学家和地质学家至关重要。通过研究河流如何向上游推进，研究人员可以更好地预测未来的地貌变化，并制定缓解对社区和生态系统潜在负面影响的策略。例如，在易受洪水影响的地区，了解河流如何可能向上游推进可以帮助规划者设计更好的洪水控制措施。总之，术语headward概括了地貌学中的一个重要概念，说明了河流如何随着时间的推移塑造地形。这一过程的意义超越了单纯的地理，影响着生态系统、人类活动和资源管理。通过理解headward侵蚀的机制，我们可以更好地欣赏水、土地与生命之间错综复杂的关系，最终增强对我们周围自然世界的尊重。