| 卢辉雄,王诜,陈召,吴蔚,孙永彬,王少帅,牛海威,李启亮,欧琪琪,黄燕鹏.镇沅县哀牢山红层区泥石流发育特征与易发性评价[J].矿产勘查,2025,16(4):911-922 |
| 镇沅县哀牢山红层区泥石流发育特征与易发性评价 |
| Development characteristics and susceptibility evaluation of debris flow in the red bed area of Ailao Mountain, Zhenyuan County |
| 投稿时间：2024-05-16 |
| DOI：10.20008/j.kckc.202504021 |
| 中文关键词: 哀牢山红层 泥石流形成条件 泥石流发育特征 评价因子 易发性评价 |
| 英文关键词: the red layer of Ailao Mountain conditions for the formation of debris flows development charac-teristics of debris flow evaluation factor susceptibility assessment |
| 基金项目:本文受2021年度云南省重点区域地质灾害精细化调查与风险评价(YNGH[2021]-055)项目资助。 |
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| 中文摘要: |
| 镇沅县哀牢山西坡地处滇西红层，是云南省滑坡-泥石流链式灾害高易发区，区内红层具有岩体易软化、软弱层带和泥化夹层普遍发育等特点，在强降雨过程中易产生群发性泥石流灾害，进而造成巨大的生命财产损失。本文以镇沅县哀牢山红层区泥石流为研究对象，通过野外精细调查与历史资料统计分析，详细了解红层区泥石流形成条件、发育特征。以流域为评价单元，采用信息量法筛选出流域面积、纵坡降、相对高差、沟壑密度、工程地质岩组、滑坡崩塌灾点密度 6个评价因子，利用自然断点法划分因子区间，完成泥石流易发性评价。研究结果表明:(1)泥石流物质来源主要包括沟道冲积+洪积物源、残坡积红层物源、人类活动堆积体、红层滑坡+崩塌堆积体 4种；(2)利用该方法将研究区易发区分为 4个等级:极高易发区面积 19.02 km2，零星分布于各河间山地、台地，流域分布相对较多；高易发区面积 49.99 km2主要分布于靠近川河的谷坡阶地；中易发区面积 26.99 km2，主要集中于者干河南部支流流域；低易发区面，积 159.78 km2，主要集中于区内主河道及支流谷坡中下部区域。研究结果较好地反映了红层区泥石流发育特征和 |
| 英文摘要: |
| The west slope of Ailao Mountain in Zhenyuan County is located in the Red layer of western YunnanProvince. It is a high-risk area for the chain disaster of landslides and debris flows in Yunnan Province. The redlayer in the area has the characteristics of easy softening of rock mass, widespread development of weak layer zonesand mudfied interlayers. During the process of heavy rainfall, it is prone to mass debris flow disasters, thereby caus-ing huge losses of life and property. This paper takes the debris flow in the red layer area of Ailao Mountain,Zhenyuan County as the research object. Through meticulous field investigation and statistical analysis of historicaldata, the formation conditions and development characteristics of the debris flow in the red layer area are under-stood in detail. Taking the basin as the evaluation unit, six evaluation factors, namely the basin area, longitudinalslope, relative height difference, gully density, engineering geological rock group and landslide and collapse disasterpoint density, were screened out by the information quantity method. The factor intervals were divided by the natu-ral breakpoint method to complete the evaluation of the susceptibility of debris flow. The research results show that:(1) The material sources of debris flows mainly include four types: channel alluvial + fluvial material sources, re-sidual slope accumulation red layer material sources, human activity accumulation bodies, and red layer landslide +collapse accumulation bodies. (2) By using this method, the susceptible areas in the study area were divided intofour grades: The area of the extremely high susceptible area was 19.02 km2, sporadically distributed in the moun-tains and plateaus between various rivers, and relatively more in the basin distribution; the area of the high-riskzone is 49.99 square kilometers, mainly distributed in the terraces of valleys and slopes near rivers; the area of themedium-prone zone is 26.99 square kilometers, mainly concentrated in the basin of the southern tributaries of theZhegan River; the area of the low-incidence zone is 159.78 square kilometers, mainly concentrated in the middleand lower parts of the valleys and slopes of the main rivers and tributaries within the zone. The research results wellreflect the development characteristics and susceptibility of debris flows in the red layer area, which can provide animportant basis for disaster prevention and mitigation work in Gupo Village, the red layer area of Ailao Mountain,Zhenyuan County. |
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