In order to study the flow characteristics in water bodies with rigid aquatic vegetation, series of laboratory experiments are carried out in an open channel, in which glass rods are used as plants with diameters of 6mm, 8mm and 10mm, respectively. For each diameter of glass rods, four typical cases are considered with various densities and arrangements of glass rods. The flow velocities in the four cases are measured by the 3-D laser Doppler velocimeter (LDV). The water surface slope, the flow velocity, the water head loss, the vegetation drag force and the hydraulic slope are calculated, analyzed and discussed. The horizontal, vertical and total vegetation densities in the vegetation area are defined and the relationship between these physical parameters and the water surface slope are studied. The head loss and the hydraulic slope in the vegetation area are also calculated, compared and analyzed. It is indicated that the water surface slope and velocity, the head loss and the hydraulic slope in the vegetation area have a close relationship with the arrangement, the density, and the plant diameter of the vegetation.

为了研究具有刚性水生植物的水体的流动特性，在一个开放通道中进行了一系列实验室实验，在该通道中，玻璃棒分别用作直径为6mm，8mm和10mm的植物。对于玻璃棒的每个直径，考虑了四种典型情况，它们具有各种密度和排列的玻璃棒。四种情况下的流速是通过3-D激光多普勒流速仪（LDV）测量的。计算，分析和讨论了水面坡度，流速，水头损失，植被阻力和水力坡度。定义了植被区内的水平，垂直和总植被密度，并研究了这些物理参数与水面坡度之间的关系。还计算，比较和分析了植被区的水头损失和水力斜率。结果表明，植被区水面坡度和流速，水头损失和水力坡度与植被的分布，密度和株径有密切关系。