【摘要】 以贵州省境内人工干扰较少的都柳江为研究对象,对普遍存在于天然河道中的急流-深潭-沙(砂)滩系统河道参数进行调查和分析。结果表明,都柳江从上游到下游,海拔和纵比降逐渐减小,整个河流逐渐变得平缓;3个考察河段的弯曲系数差异不明显;在上游普安和中游的三都,河段的急流-深潭-沙(砂)滩的面积和比例接近;上中下游河段各测点的急流-深潭-沙(砂)滩系统中,沙(砂)滩面积与深潭和急流的面积呈现正相关关系,急流与深潭的长度与宽度也呈正相关关系,一条河道上下游不同河段急流-深潭-沙(砂)滩系统之间每个单元所占的比例接近。更多还原

【Abstract】 In this study,the Duliujiang River,which had been less affected by human being in Guizhou Province,was selected to as a representive of natural rivers and investigated to understand channel parameters of riffle- deep and pool- sand bank system. The results showed that,from upstream to downstream,the altitude and vertical gradient decrease,and the whole river tends to gradually flatten out. There was no obvious difference in tortuosity among the tested sections. Also,the area and proportion of riffle,deep pool and sand bank did not vary between Pu’an and Sandu. Furthermore,the area of sand bank was positively correlated to that of deep pool and sand bank. The same correlation was also obtained between length and width of the measured points of riffle and deep pool. The proportions of each unite of riffle,deep pool and sand bank were similar among the tested sections.更多还原