摘要
本文依据黄河中下游干支流14个水文站的实测资料,吸收了近年来高含沙水流的研究成果,用多元回归的方法建立了悬移质水流挟沙力的计算公式。公式将高含沙水流和一般含沙水流的挟沙力计算统一起来,并对多沙河流的挟沙机理做了初步分析,反映了泥沙级配、河道形态、来水含沙量等因素对水流挟沙力的影响。对采用的436组微冲微淤或相对平衡资料的验证表明,其总体相关系数r=0.98,标准差σ=0.31,计算结果与实测资料符合较好。
Based on the field data from 14 stations located in the middle, Lower Yellow River and its tributaries, a method for calculating the carrying capacity of sediment laden flow is provided by the use of complex regre -ssion of main parameters. The formula obtained takes account on the effects of main factors on sediment carrying capacity including water flow conditions, geometry of cross sections, sediment concentration, as well as sediment gradings. It can calculate both the normal and the hyperconcentrated, conditions, and some mechanism on suspended sediment carrying is also preliminarily understood.The method introduced in this paper is verified by the data of 436 groups selected with a slight erosion or deposition, or in relative equa-librium condition, and the verification appears pretty satisfactory, the regression coefficient r = 0.98, and the standard error σ=0.31. Because of the vast range of the data used in this paper, the method can be well used for heavy sediment-laden rivers other than the Yellow River.
出处
《泥沙研究》
CSCD
北大核心
1993年第2期67-75,共9页
Journal of Sediment Research
