Influence of Rock-Soil Cover Pattern on Runoff and Sediment Yield on Karst Slopes in Southwest China

AO Liman; JIANG Chaohua; XU Qinxue; FANG Rongjie; FU Zhiyong; CHEN Hongsong

doi:10.13870/j.cnki.stbcxb.2023.01.014

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Influence of Rock-Soil Cover Pattern on Runoff and Sediment Yield on Karst Slopes in Southwest China

更新时间：2025-03-12

- Influence of Rock-Soil Cover Pattern on Runoff and Sediment Yield on Karst Slopes in Southwest China
- Vol. 37, Issue 1, Pages: 90-96(2023)
- 作者机构：
  
  1. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西,桂林,541004
  2. 桂林理工大学广西环境污染控制理论与技术重点实验室科教结合科技创新基地,广西,桂林,541004
  3. 广西珠委南宁勘测设计院,南宁,530007
  4. 中国科学院环江喀斯特生态系统观测研究站, 广西环江,547100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.01.014
  CLC： S157.1
- Published：2023
- 稿件说明：
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AO Liman, JIANG Chaohua, XU Qinxue, et al. Influence of Rock-Soil Cover Pattern on Runoff and Sediment Yield on Karst Slopes in Southwest China[J]. 2023, 37(1): 90-96.
DOI：

AO Liman, JIANG Chaohua, XU Qinxue, et al. Influence of Rock-Soil Cover Pattern on Runoff and Sediment Yield on Karst Slopes in Southwest China[J]. 2023, 37(1): 90-96. DOI： 10.13870/j.cnki.stbcxb.2023.01.014.

摘要

为研究不同岩土格局对喀斯特坡地水土流失/漏失的影响

利用人工模拟降雨试验

以裸坡为对照组

研究镶嵌格局、横坡格局、顺坡格局3种岩土覆被格局下的坡面产流产沙特征。结果表明:(1)顺坡格局的地表产流量最多

分别较镶嵌格局、横坡格局与裸坡的地表产流量增加88.6%

67.1%

576.1%

同时顺坡格局的地下产流量最少

分别较镶嵌格局、横坡格局与裸坡减少37.5%

36.1%

39.2%。(2)地表产沙量顺坡格局>镶嵌格局>横坡格局>裸坡

地下产沙量镶嵌格局>横坡格局>顺坡格局>裸坡。3种岩土格局的地表产沙量较裸坡均有明显增加

但地下产沙量相对增加较少。(3)岩土格局可改变地表径流泥沙关系

地表累积径流量与地表累积产沙量呈幂函数关系

镶嵌格局明显改变地表径流泥沙关系

使坡面地表侵蚀量显著提升。研究结果可进一步深化对喀斯特坡地降雨侵蚀规律的认识

为喀斯特地区的石漠化治理提供参考依据。

Abstract

In order to explore the influence of different rock-soil cover patterns on soil erosion/loss in karst slope land

the artificially simulated rainfall experiment was used to study the characteristics of runoff and sediment yield on karst slope under three rock-soil cover patterns of mosaic pattern

transverse slope pattern and downslope pattern with bare slope as the control group. The results showed that: (1) The surface runoff yield of the downslope pattern was the largest

which increased by 88.6%

67.1% and 576.1% compared with the mosaic pattern

transverse slope pattern and bare slope

respectively. At the same time

the underground runoff yield of the downslope pattern was the smallest

which was 37.5%

36.1% and 39.2% lower than that of the mosaic pattern

transverse slope pattern and bare slope

respectively. (2) The surface sediment yield followed the order of downslope pattern > mosaic pattern > transverse slope pattern > bare slope

and the underground sediment yield followed the order of mosaic pattern > transverse slope pattern > downslope pattern > bare slope. The surface sediment yield of the three rock-soil cover patterns significantly increased compared with that of the bare slope

but the underground sediment yield increased relatively less. (3) Rock-soil cover pattern could the relationship between surface runoff and sediment. There was a power function relationship between surface cumulative runoff and surface cumulative sediment yield. Mosaic pattern significantly changed the relationship between surface runoff and sediment

and significantly improved the slope surface erosion. The results of this paper could further enhance the understanding of rainfall erosion law in karst slope land

and provide a reference for rocky desertification control in karst area.

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