Characteristics and Countermeasures of Small Watershed Debris Flow Geo-hazard in Longquan City

WANG Zhen-yu; QIU Jian-guo; WANG Qing-hua

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Characteristics and Countermeasures of Small Watershed Debris Flow Geo-hazard in Longquan City

- Characteristics and Countermeasures of Small Watershed Debris Flow Geo-hazard in Longquan City
- Bulletin of Soiland Water Conservation Vol. 30, Issue 4, Pages: 210-214(2011)
- 作者机构：
  
  1. 四川交通职业技术学院四川温江,611130
  2. 浙江省地质调查院浙江萧山,311203
- 作者简介：
- 基金信息：
- DOI：
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- Published：2011
- 稿件说明：
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WANG Zhen-yu, QIU Jian-guo, WANG Qing-hua. Characteristics and Countermeasures of Small Watershed Debris Flow Geo-hazard in Longquan City[J]. Bulletin of Soiland Water Conservation, 2011, 30(4): 210-214.
DOI：

WANG Zhen-yu, QIU Jian-guo, WANG Qing-hua. Characteristics and Countermeasures of Small Watershed Debris Flow Geo-hazard in Longquan City[J]. Bulletin of Soiland Water Conservation, 2011, 30(4): 210-214. DOI：

摘要

浙江省龙泉市地质环境复杂，山地灾害严重，泥石流灾害处于高风险区，是浙江省泥石流的重灾区。随着龙泉市旅游、经济建设的发展，对泥石流的成灾特征及防治研究愈加紧迫。通过普查、遥感解译、专家详查等方法，共调查了146条沟谷，其中重点调查96条，典型调查49条，确定泥石流隐患46处。经分析发现龙泉市小流域泥石流地质灾害表现出市域面积大范围分布泥石流，集中在台汛期爆发，主要沿断裂带分布，合适的地貌条件利于泥石流形成，火山岩区域发生泥石流几率高，水土流失区和植被良好区均会发生泥石流共6个特征。并根据泥石流灾害特征提出了相应的防灾减灾对策，可为该市泥石流防治工作提供科学依据。

Abstract

In Longquan County of Zhejiang Province

the geological environment is complex

the mountain disasters are serious.It is the high risk area of debris flow in Zhejiang Province.With the development of tourism and economy

it becomes urgent to study the characteristics and counter measures of debris flows in Longquan City.With the help of census

remotesensing and expertinquiry

146 gullys were surveyed

among which 96 was made by major investigation and 49 by typical investigation

46 potential debris flow dangers were identified.Through the survey and analysis

six characteristics of small watershed debris flow geohazard in Longquan City were summarized:wide distribution of debris flows in this area

breaking out mostly in typhoon and flood season

distributing mostly along fractures

suitable geographic conditions for the form ation of debris flow

high incidence of debris flow in lava

possible occurrence of debris flow in areas with both water loss and soil erosion and high-covered vegetation.Some corresponding count ermeasures were proposed to provide a rational basis for the prevention and treatment of debris flows in Longquan City.

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