Effects of Angle Between Rock and Slope on the Processes of Runoff and Sediment Yield in the Karst Trough Valley Area

SONG Lan; ZHANG Yuqi; HE Binghui; ZENG Rongchang; LI Tianyang

doi:10.13870/j.cnki.stbcxb.2022.03.002

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Effects of Angle Between Rock and Slope on the Processes of Runoff and Sediment Yield in the Karst Trough Valley Area

更新时间：2026-04-09

- Effects of Angle Between Rock and Slope on the Processes of Runoff and Sediment Yield in the Karst Trough Valley Area
- Vol. 36, Issue 3, Pages: 9-15(2022)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.03.002
  CLC： S157.1
- Online First：27 May 2022，
  
  Published：2022
- 稿件说明：
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SONG Lan, ZHANG Yuqi, HE Binghui, et al. Effects of Angle Between Rock and Slope on the Processes of Runoff and Sediment Yield in the Karst Trough Valley Area[J]. 2022, 36(3): 9-15.
DOI：

SONG Lan, ZHANG Yuqi, HE Binghui, et al. Effects of Angle Between Rock and Slope on the Processes of Runoff and Sediment Yield in the Karst Trough Valley Area[J]. 2022, 36(3): 9-15. DOI： 10.13870/j.cnki.stbcxb.2022.03.002.

摘要

为明确喀斯特槽谷区岩石与坡面夹角对坡面产流产沙过程的影响

在6个岩石与坡面夹角(30°

60°

90°

120°

150°

180°)、3个坡度(10°

15°

20°)和3个流量(5

7.5

10 L/min)组合条件下

开展室内放水冲刷试验。结果表明:(1)地表产流率随冲刷历时呈先增加后稳定的趋势

而含沙量和地表产沙率随冲刷历时均呈波动性减小趋势;(2)各岩石与坡面夹角下

地表产流率无显著差异(P＞0.05);但含沙量与地表产沙率均差异显著(P＜0.05)

表现为含沙量和地表产沙率在60°夹角下与30°和120°夹角下差异不显著(P＞0.05)

但显著高于90°

150°和180°条件下的含沙量和地表产沙率(P＜0.05);(3)地表产流率与含沙量在60°

90°

120°夹角下均呈显著幂函数正相关(R2=0.32~0.56

P＜0.05)

而在其他夹角下二者关系不显著(P>0.05)。地表产流率与地表产沙率在60°

90°

120°

150°

180°夹角下呈显著线性正相关(R2=0.35~0.86

P＜0.05)。研究表明喀[JP]斯特槽谷区岩石与坡面呈一定夹角时

可加剧坡面产沙

并改变产流与产沙关系。

Abstract

To elucidate the roles of angle between rock and slope in affecting the processes of runoff and sediment yield in the Karst Trough Valley Area of Southwest China

the combined conditions of 6 angles between rock and slope (30°

60°

90°

120°

150°

180°)

3 slope gradients (10°

15°

20°)

and 3 flow rates (5

7.5

10 L/min) were employed in laboratory scouring simulation experiments. Results showed that:(1) Surface runoff rate increased to be stable with scouring duration

while sediment concentration and sediment yield rate both increased first and then decreased with the scouring duration; (2) Surface runoff rate showed non-significant differences among different angles between rock and slope (P>0.05). Sediment concentration and sediment yield both displayed non-significant differences among the angels of 30°

60° and 120° (P>0.05)

which were significant higher than those angels of 90°

150° and 180° (P<0.05); (3) Surface runoff rate presented significantly positive power relationships with sediment concentration under the angles of 60°

90° and 120° (R2=0.32~0.56

P<0.05)

while exhibited non-significant relationships with sediment concentration at other angles (P>0.05). Similarly

surface runoff rate was significantly linearly correlated with sediment yield at the angles of 60°

90°

120°

150° and 180° (R2=0.35~0.86

P<0.05). Our results show that a certain angle between rock and slope in the slope of the Karst Trough Valley area can accelerate the sediment yield and change the relationship between runoff and sediment yield.

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