Prediction of Possibility of River Blokcing by Debris Flow in Section of Yeniu Gully in Dadu River Watershed

WANG Dong-hui; LI Ming-hui; GAO Yan-chao

doi:10.13961/j.cnki.stbctb.2014.02.048

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Prediction of Possibility of River Blokcing by Debris Flow in Section of Yeniu Gully in Dadu River Watershed

- Prediction of Possibility of River Blokcing by Debris Flow in Section of Yeniu Gully in Dadu River Watershed
- Bulletin of Soiland Water Conservation Vol. 33, Issue 2, Pages: 230-233(2014)
- 作者机构：
  
  中国地质调查局成都地质调查中心,四川,成都,610081
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.02.048
  CLC：
- Published：2014
- 稿件说明：
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WANG Dong-hui, LI Ming-hui, GAO Yan-chao. Prediction of Possibility of River Blokcing by Debris Flow in Section of Yeniu Gully in Dadu River Watershed[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 230-233.
DOI：

WANG Dong-hui, LI Ming-hui, GAO Yan-chao. Prediction of Possibility of River Blokcing by Debris Flow in Section of Yeniu Gully in Dadu River Watershed[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 230-233. DOI： 10.13961/j.cnki.stbctb.2014.02.048.

摘要

野牛沟为大渡河流域中段具代表性的一条泥石流沟

其充足的物源储备和地形条件为泥石流的再次暴发提供了有利条件。通过对3种频率下野牛沟泥石流一次冲出固体物质方量、流量和扇形地的沟床条件3个方面的研究

对传统的堵河经验公式进行了修正

并通过对野牛沟泥石流的研究对修正后的经验公式进行了验证。结果表明

在P=1%(100年一遇泥石流)条件下

野牛沟发生泥石流会完全堵塞金汤河;P=2%时(50年一遇泥石流)

可能会堵河或部分堵塞;P=5%时(20年一遇泥石流)

野牛沟泥石流不会造成堵河。研究结果验证了修正后堵河公式在研究区域内的通用性

为泥石流灾害提前识别和预防提供了可靠的方法。

Abstract

Yeniu gully is a representative debris flow gully in the middle reaches of Dadu River. The ample source of materials and terrain change create appropriate conditions for the formation of next debris flow. Based on the study of solid material discharge

and the gully-bed condition of fan by debris flow from Yeniu gully under three different frequencies

the conventional empirical blocking formula was revised. The revised formula was verified by the study on debris flow in the Jintang River in Yeniu gully. The results showed that Jintang River will be completely blocked when P=1%

and partially blocked when P=2% and never blocked when P=5%. The test indicated the generality of the revised formula

which can be applied in the middle reaches of Dadu River.

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references

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