在Stipa spp.的影响. 在近地表面的流过程:风洞模拟风力道
Kecun Zhang1, Jiapeng Pan2, Zhishan An1
1State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands & Dunhuang Gobi and Desert Ecology and Environment Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China.
Journal of environmental management
|March 12, 2026
概括
史蒂帕Stipa spp. 这种病. 阿尔卑斯山草原中的草会降低风速和沙侵蚀,但可能会因保留粗颗粒而导致营养损失,影响荒漠化. 这项研究阐明了它们在气过程中的作用.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 地质形态学 地质形态学
背景情况:
- 阿尔卑斯山的草原面临着由于气候变化的荒漠化风险.
- 史蒂帕Stipa spp. 这种病. 在这些脆弱的生态系统中占主导地位的植物物种.
- 了解Stipa spp. 的理解 对于生态恢复而言,大气层在流过程中的作用至关重要.
研究的目的:
- 为了调查Stipa spp.的影响. 关于风的特性,沙子侵蚀和沉积.
- 为了澄清阿尔卑斯山草原岩荒漠化的机制.
- 为控制荒漠化和生态恢复提供指导.
主要方法:
- 风洞实验模拟阿尔卑斯山草原条件.
- 对Stipa spp.进行系统调查. 它对近地表面的太阳流程的影响.
- 分析风速,沙子侵蚀/沉积率以及运输的沙子特性.
主要成果:
- 史蒂帕Stipa spp. 这种病. 显著降低了近地表面的风速和增加了表面粗度.
- 沙侵蚀和沉积率比Stipa spp.显著降低. 与赤裸的沙子相比.与赤裸的沙子相比.
- 史蒂帕Stipa spp. 这种病. 最好保留粗沙颗粒,导致更细的颗粒损失.
结论:
- 史蒂帕Stipa spp. 这种病. 它们在调节阿尔卑斯山草原的气过程中起着关键作用.
- 通过Stipa spp.进行选择性颗粒保留. 可能导致营养损失并加剧荒漠化.
- 这些发现为管理和恢复荒漠化的高山生态系统提供了洞察力.
相关概念视频
Regulation of Transpiration by Stomata
26.2K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
26.2K
Responses to Drought and Flooding
10.2K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.2K
Streamlines, Streaklines, and Pathlines
1.9K
A streamline represents the trajectory that is always tangent to the fluid's velocity vector at any given point. The velocity of a fluid particle is always directed along the streamline, ensuring the particle continuously follows the streamline's path. Streamlines are particularly useful for visualizing the overall direction of flow in a fluid system, and they provide an instantaneous representation of the flow's velocity field. In steady flow, where conditions do not change over...
1.9K
Typical Model Studies
842
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
842
Gradually Varying Flow
700
Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...
700
Field Procedure for Staking Out Curves
617
Staking out curves is an essential process in construction to ensure the accurate alignment of structures along a curved path. This task involves positioning stakes at calculated locations corresponding to the curve's design, effectively translating plans into physical markers in the field. The process begins by determining the geometric parameters of the curve, including the radius, central angle, and tangent distances. These parameters are critical for identifying key points such as the...
617


