Patches of vegetation in natural water bodies grow close to each other and may affect each other’s wake pattern with significant implications on nutrient uptake and local sediment transport. This experimental study analyzed the wakes of two neighboring circular patches of emergent artificial vegetation with different densities, with the tested solid volume fractions being equal to 0.059, 0.114, and 0.188. The neighboring patches were positioned in two different configurations, namely side-by-side (\(L/D=0\) and \(T/D=1.5\)) and staggered (\(L/D=3.5\) and \(T/D=1.5\)) configurations, with D, L, and T denoting the patch diameter, the patches center-to-center longitudinal distance, and the patches center-to-center transverse distance, respectively. Results show that neighboring patches with different densities generated two distinctly different wakes at the near downstream while after 7–10D these two wakes started merging into one. The flow immediately downstream of a patch was not significantly affected by the presence of a neighboring patch and remained similar to that of an isolated patch, besides the wake of the upstream patch in staggered configuration, which was significantly affected by the downstream patch. The solid volume fraction of the neighboring patch determined the flow velocity and turbulence intensity in between the patches, which were much different compared to measurements at the side of an isolated patch.

天然水体中的植被斑块彼此靠近生长，并可能影响彼此的苏醒模式，对养分吸收和局部泥沙输送具有重要影响。这项实验研究分析了密度不同的新兴人工植被的两个相邻圆形斑块的尾迹，测试的固体体积分数分别为0.059、0.114和0.188。相邻的补丁以两种不同的配置放置，即并排（\（L / D = 0 \）和\（T / D = 1.5 \））和交错排列（\（L / D = 3.5 \）和\（T / D = 1.5 \））配置，其中D，L和T分别表示斑块直径，斑块中心到纵向的距离和斑块中心到横向的距离。结果表明，具有不同密度的相邻斑块在7-10 D之后在下游附近产生了两个明显不同的尾流。这两个觉醒开始融合为一。紧邻贴片下游的流量不受相邻贴片的存在的影响，并且与上游贴片呈交错构型的醒来相比，受相邻贴片的影响很大，并且与分离的贴片相似，并且与下游隔离片的流动相似。相邻贴片的固体体积分数决定了贴片之间的流速和湍流强度，与孤立贴片侧面的测量值相比有很大不同。