三维模型构建和风模拟不同树种在农田庇护所的土地
Xiao-Xiao Jia1, Hui-Jie Xiao1, Zhi-Ming Xin2
1School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China.
Ying yong sheng tai xue bao = The journal of applied ecology
|September 11, 2023
概括
干旱地区的保护性森林使用树木结构来控制风和沙子. 树木的多孔性,就像光学和体积的多孔性一样,显著影响降低风速和有效保护区.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 计算流体动力学的流体动力学.
背景情况:
- 保护性森林是干旱地区的关键生态障碍,减轻风和沙子的危害.
- 个体树的结构特征是保护效益的关键决定因素.
- 了解这些特征对于优化沙漠环境中绿洲保护至关重要.
研究的目的:
- 探索乌兰布赫沙漠绿洲中个别树木的结构和空气动力学特征.
- 建立树木结构参数和风场指数之间的关系.
- 确定影响树木保护效益的关键结构因素.
主要方法:
- 利用地面LiDAR和计算流体动力学 (CFD) 来分析真实3D树模型.
- 采用AdQSM和MeshLab来准确地构建树模型.
- 研究风场模式,包括压力和风速分布在树木周围.
主要成果:
- 树木周围的风场被分为六个不同的区域.
- 有效的保护距离因物种而异,从0.20H到1.64H (H=树高度).
- 光学孔隙性和体积孔隙性被确定为影响风力减少的主要因素,胸高直径,树表面积和光学孔隙性是关键的回归变量.
结论:
- 个体树木结构显著影响了空气动力学特性和保护效益.
- 孔径参数对于有效的风速降低和保护至关重要.
- 这些发现为选择和管理树种提供了洞察力,以加强沙漠绿洲的保护.
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