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\begin{document}

\title{Effect of check dams on sediment concentration in a watershed during a
heavy rain event}



\author[1]{Mian Li}%
\author[1]{Zhenzhou Shen}%
\author[2]{Bo Hui}%
\author[1]{Xizhi Lv}%
\author[1]{Er Yang}%
\author[1]{Li Ma}%
\author[1]{Yongxin Ni}%
\author[1]{Hongzhe Bao}%
\affil[1]{Yellow River Institute of Hydrology and Water Resources}%
\affil[2]{Yellow River Conservancy Commission}%


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  \date{June 18, 2024}


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\begin{abstract}
Understanding the changes of sediment concentration (SC) in rivers is of
great significance for correctly evaluating the effectiveness of soil
and water conservation measures. By comparing the variation of SC in a
typical watershed at the multi-year and the flood event scale, as well
as the field investigations of sediment retained in check dams during a
heavy rain in the Loess Hilly Area, the effect of check dams on SC were
analyzed in this paper. Results showed that the check dam retained 56\%
of the eroded sediment in the watershed during the heavy rain on July
26, 2017, and greatly reduced the sediment transport to the downstream.
Under the heavy rain condition, the slope measures (afforestation,
grassing and terraces) had limited effect on reducing sediment yield,
and can not stop the occurrence of hyperconcentrated flow. The average
SC of runoff in the dam-controlled catchments was 438 kg/m
\textsuperscript{3}, while it was only 148 kg/m \textsuperscript{3} at
the watershed outlet. The gully measures (check dams) played an
important role in altering the characteristic of hyperconcentrated flow
at the outlet of the watershed. In order to control the transport of
hyperconcentrated flow to the downstream, more attention should be paid
to the construction of check dams while carrying out vegetation
ecological construction in the Loess Hilly Area.%
\end{abstract}%



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\textbf{Hosted file}

\verb`Effect of check dams on sediment concentration.docx`  available at \url{https://authorea.com/users/674785/articles/672987-effect-of-check-dams-on-sediment-concentration-in-a-watershed-during-a-heavy-rain-event}

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