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Jun ZOU, Jian-min ZHANG, Chang-yuan LI. Effects of the Mixing Degree Upstream of the Diverging Area on the Pollutant Allocation Characteristics of a Braided River[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .
@article{title="Effects of the Mixing Degree Upstream of the Diverging Area on the Pollutant Allocation Characteristics of a Braided River",
author="Jun ZOU, Jian-min ZHANG, Chang-yuan LI",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2100540"
}
%0 Journal Article
%T Effects of the Mixing Degree Upstream of the Diverging Area on the Pollutant Allocation Characteristics of a Braided River
%A Jun ZOU
%A Jian-min ZHANG
%A Chang-yuan LI
%J Journal of Zhejiang University SCIENCE A
%V -1
%N -1
%P
%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2100540
TY - JOUR
T1 - Effects of the Mixing Degree Upstream of the Diverging Area on the Pollutant Allocation Characteristics of a Braided River
A1 - Jun ZOU
A1 - Jian-min ZHANG
A1 - Chang-yuan LI
J0 - Journal of Zhejiang University Science A
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2100540
Abstract: The mixing degree upstream of the diverging area is one of the important factors influencing the pollutant allocation characteristics of braided rivers, but the effect remains unclear at present. In this study, physical model tests were designed to study the effect on the pollutant flux ratio with six branching forms and a series of longitudinal discharge distances. The results indicated that the mixing degree upstream of the diverging area, which is closely related to the longitudinal discharge distance, notably affected the pollutant flux ratio. The lower the mixing degree, the larger was the deviation of the pollutant flux ratio from the discharge ratio. Moreover, a linear relationship was attained between the dimensionless mixing degree and the dimensionless deviation of the pollutant flux ratio from the discharge ratio. Consideration of different branching angles or different water layers or different branches did not affect this trend. The experimental results further demonstrated that the intercept and slope of the aforementioned linear relationship depended on the branching angle and exhibited an opposite monotonicity with a symmetric branch angle as the dividing point. These results help towards a better understanding of the mechanism of the factors influencing pollutant transport in complicated braided rivers, and provide a new approach to predicting the pollutant flux ratio of braided rivers.
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