Effect of Sediment Particle Composition on Vertical Hydraulic Conductivity of Weihe River Streambed

ZHANG Bo; SONG Jin-xi; CAO Ming-ming

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Effect of Sediment Particle Composition on Vertical Hydraulic Conductivity of Weihe River Streambed

- Effect of Sediment Particle Composition on Vertical Hydraulic Conductivity of Weihe River Streambed
- Bulletin of Soiland Water Conservation Vol. 32, Issue 5, Pages: 40-44(2013)
- 作者机构：
  
  西北大学城市与环境学院,陕西,西安,710127
- 作者简介：
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- Published：2013
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ZHANG Bo, SONG Jin-xi, CAO Ming-ming. Effect of Sediment Particle Composition on Vertical Hydraulic Conductivity of Weihe River Streambed[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 40-44.
DOI：

ZHANG Bo, SONG Jin-xi, CAO Ming-ming. Effect of Sediment Particle Composition on Vertical Hydraulic Conductivity of Weihe River Streambed[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 40-44. DOI：

摘要

正确认识河流沉积物颗粒组成与渗透系数之间的关系，对于准确测算河床渗透系数具有重要的意义。以渭河关中段为研究对象，采用水头下降竖管渗透实验法对渭河关中段4个河段的43个点位做渗透系数的原位测定，获取各点位的垂向渗透系数(Kv)值。对测定点的沉积物样品进行了粒度分析，并进一步分析了Kv与沉积物颗粒组成之间的相关关系。结果表明，垂向渗透系数与其沉积物的含砂量以及砂土与黏土含量比值均呈指数正相关，与黏土率呈指数负相关。研究获得的垂向渗透系数与沉积物颗粒组成的拟合方程为通过颗粒分析计算垂向渗透系数提供了依据。

Abstract

An understanding of the relationship between particle size composition and vertical hydraulic conductivity(K)of streambed is of importance to estimate streambed Kr accurately.By taking the middle seestion of the Weihe River as the research object

the Kr

values of streambed were derived by a falling-head standpipe permeameter test which was conducted at 43 locations of four sites along the river.Meanwhile

sediment samples in the locations were taken and particle size analysis of the samples was made.Then

the correlation between particle size composition and the Kr was analyzed.It can be concluded that the Kr

had a positive correlation with sand content and the ratio of sand to clay particles in sediment

while they had a negative correlation with clay particles.The regression equation for the relationship between particle size composition and the Kr

can provide reference for estimating the Kr

of streambed in the Weihe River by the particle size analysis.

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