中原地区生态湖若干水生植物弹性模量实测及分析

Measurement and Analysis of Elastic Modulus of Aquatic Plants in Ecological Lakes in Central Plains

水生植物作为湖泊生态环境中的重要因子,对湖泊的修复治理具有关键作用。水生植物的阻水作用对湖泊蓄泄洪过程影响显著,从而水生植物对糙率的影响成为生态湖泊水力学研究的重要内容。水生植物高度与湖泊糙率密切相关,因而水生植物弹性模量是计算其变形量的重要力学性能参数。将水生植物茎秆简化为变截面悬臂梁,通过对8种水生植物弯曲变形试验,测得拉力、位移等参数,计算其弹性模量值,得到实测的8种水生植物弹性模量变化的基本范围。对比可知,这些水生植物的弹性模量均随生长龄期或总长的增长而增长。

As an important factor in the ecological environment of lakes,aquatic plants play a key role in the tion restora-and management of lakes.The water blocking effect of aquatic plants has a significant impact on the flood storage and discharge process of lakes,so the impact of aquatic plants on the roughness has become an important part of the draulic hy-research of ecological lakes.The height of aquatic plants is closely related to the roughness of lakes.The elastic modulus of aquatic plants is an important mechanical property parameter for calculating its deformation.The stem of quatic a-plants is simplified as a cantilever beam with variable cross-section.Through the bending deformation test of eight aquatic plants,the tensile force,displacement and other parameters are measured,and the elastic modulus value is lated.calcu-The basic range of the measured elastic modulus change of eight aquatic plants is obtained.The comparison shows that the elastic modulus of these aquatic plants increases with the growth age or total Key length.