沙棘植物柔性坝坝体变形初步分析

本文基于2005年在内蒙古准格尔旗西召沟小流域对已植的沙棘柔性坝进行野外调查,从植物生长角度对沙棘柔性坝坝体进行了纵向、横向、垂向(即沙棘柔性坝坝长、坝宽、坝高)的变形分析。对于沙棘柔性坝的坝长变化,主要从沙棘根系蘖苗萌生出发,分析得出其每年扩展约1m;柔性坝坝宽受沟宽限制,其发展趋势为扩展至满沟;柔性坝坝高变化采用三次函数和Logistic型函数两种具有“S”形特征的曲线进行拟合分析,经对比其变化过程服从Logistic型生长函数,并结合Logistic函数对沙棘植物柔性坝坝高的变化进行了具体意义的探讨。

Analysis on the Deformation of the Seabuckthorn Flexible Dam

Base on the field model survey of the planted seabuckthorn flexible dam in Xi'zhao watershed in Inner Mongolia of China in 2005,the deformation of the seabuckthorn flexible dam was analyzed in botanical terms from the direction of longitudinal,transverse and vertical (the same as deformation on the length,width and height of the seabuckthorn flexible dam).By studied sprouting of the seabuckthorn root system,it was found that the length of dam enlarged 1 m every year,and the width of the dam would be expanding to full of gully because of the restriction of width of gully.Then two functions which having the feature of "S" shape were adopted to fit the changing of the flexible dam,height one was the cubic equation and the other was Logistic function.By comparing the two functions it was showed height of flexible dam followed Logistic function,and then explored specific significance of the changing of flexible dam height.