This study documents the measurement of the wind resistance of different types of vegetation. The measurements are made in a wind tunnel with a 2.0 m test section and 0.5 m by 0.5 m cross-section. Samples of vegetation have been cut into cubical volumes that span the cross-section of the tunnel. The wind resistance is inferred via measurement of the pressure drop across the sample at wind speeds ranging from 2 to 8 m/s. The average drag coefficient of all sample configurations was determined to be 2.8 with an expanded uncertainty of 0.4. A random-effects one-way ANOVA was implemented on the drag coefficients of different vegetation samples. The analysis yielded a significant variation among the species. Further examination using a Tukey's test, showed only a single difference between vegetation two species. Despite the significant difference, the average drag coefficient of each species was still within the uncertainty bounds of the overall average drag coefficient, suggesting that the significant difference may not be large enough to have a practical implication.

中文翻译：

---

确定通过植被冠层的流动阻力

本研究记录了对不同类型植被的抗风能力的测量。测量是在具有 2.0 m 测试截面和 0.5 m x 0.5 m 横截面的风洞中进行的。植被样本被切割成跨越隧道横截面的立方体。风阻是通过测量风速范围为 2 到 8 m/s 时样品两端的压降来推断的。所有样品配置的平均阻力系数确定为 2.8，扩展不确定度为 0.4。对不同植被样本的阻力系数实施了随机效应单向方差分析。分析产生了物种之间的显着差异。使用 Tukey 检验的进一步检查显示，两个物种之间的植被仅存在一个差异。尽管存在显着差异，