云南省维西县地质灾害孕灾环境及易发性分区
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摘要
维西县位于滇西北横断山脉中段高山峡谷地带,地质构造复杂、地质环境脆弱、年降水量大且集中,决定了该区属地质灾害高易发区.受自然、气候和人类工程活动影响,全县境内滑坡、泥石流、崩塌等地质灾害十分发育,地质灾害时空分布不均,暴发时段集中在5—9月;暴发区域多集中在人口聚集的澜沧江干流、永春河、腊普河等河谷区域.通过网格划分、选取致灾因子及对主要致灾因子赋值的方法,将维西县按照0.0～7.5,7.5～15.0,15.0～25.0的区间划分为低、中、高易发区.其中,高易发区主要分布在澜沧江沿岸及永春河沿岸,占县境总面积40.43%,中等易发区分布在腊普河流域,占县境总面积6.99%,低易发区主要分布在澜沧江西岸和东岸部分区域,占县境总面积52.58%.
Weixi County is located in the North-west Hengduan Mountain, where there are complex geological tectonics structures and vulnerable geological environment. With abundance of heavy rainstorms and humans engineering project effect, those regions belong to the high hazard prone zone. Through statistics, the geological hazards show that with uneven temporal and spatial distribution, each village in this area has whole disaster tapes which outburst concentrated mainly from May to September; the disaster affected areas are focused on the high population regions as Lancang River, Yongchun River and Lapu River. According to meshing and fixed hazard factors to special value, we can divide the Weixi County as low, medium and high hazard prone area on condition of the value 0.0 —7.5, 7.5 —15.0, 15.0 —25.0. Among it, the high hazard prone area is mainly distributed along the Lancang River and Yongchun River, which account for 40.43 percent per whole county, the medium hazard prone area is sited in the Lapu River watershed, which account forf 6.99 percent, while the low hazard prone area is distributed in the West and East part of the Lancang River, which account for 52.58 percent per Weixi Land.
Weixi County is located in the North-west Hengduan Mountain, where there are complex geological tectonics structures and vulnerable geological environment. With abundance of heavy rainstorms and humans engineering project effect, those regions belong to the high hazard prone zone. Through statistics, the geological hazards show that with uneven temporal and spatial distribution, each village in this area has whole disaster tapes which outburst concentrated mainly from May to September; the disaster affected areas are focused on the high population regions as Lancang River, Yongchun River and Lapu River. According to meshing and fixed hazard factors to special value, we can divide the Weixi County as low, medium and high hazard prone area on condition of the value 0.0 —7.5, 7.5 —15.0, 15.0 —25.0. Among it, the high hazard prone area is mainly distributed along the Lancang River and Yongchun River, which account for 40.43 percent per whole county, the medium hazard prone area is sited in the Lapu River watershed, which account forf 6.99 percent, while the low hazard prone area is distributed in the West and East part of the Lancang River, which account for 52.58 percent per Weixi Land.
引文
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[12]汤沛,邱玉宝,赵志芳.合成孔径雷达(SAR)在地质、灾害应用研究中的新进展[J].云南大学学报:自然科学版,2012,34(S2):305-313.Tang P,Qiu Y B,Zhao Z F.The new progress of synthetic aperture radar(SAR)in geological and disaster researching[J].Journal of Yunnan University:Natural Sciences Edition,2012,34(S2):305-313.
[2]柳金峰,黄江成,欧国强,等.甘肃陇南武都区泥石流易发性评价[J].中国地质灾害与防治学报,2010,21(4):8-13.DOI:10.3969/j.issn.1003-8035.2010.04.002.Liu J F,Huang J C,Ou G Q,et al.Susceptibility evaluation of debris flow in the Wudu District,Longnan City,Gansu Province[J].The Chinese Journal of Geological Hazard and Control,2010,21(4):8-13.
[3]朵天惠,王永利,陈鹏飞,等.茶园沟泥石流易发性综合评价[J].防灾减灾学报,2010,26(4):41-44.DOI:10.3969/j.issn.1674-8565.2010.04.007.Duo T H,Wang Y L,Chen P F,et al.Comprehensive evaluation of the susceptibility of Chayuangou debris flow[J].Journal of Disaster Prevention and Reduction,2010,26(4):41-44.
[4]付奇,何政伟,薛东剑.层次分析法在炉霍县泥石流易发性评价中的应用[J].地理空间信息,2012,10(6):139-141.Fu Q,He Z W,Xue D J.Application of analytic hierarchy process in evaluating the easy eruption of debris flow disaster in Luhuo County[J].Geospatial Information,2012,10(6):139-141.
[5]王念秦,薛瑶琼,李少兵,等.基于粗糙集理论的泥石流易发性综合评判模型[J].水土保持研究,2014,21(3):246-250.Wang N Q,Xue Y Q,Li S B,et al.Debris flow lability comprehensive evaluation model on rough set theory[J].Research of Soil and Water Conservation,2014,21(3):246-250.
[6]马强.吉林省泥石流灾害易发性分析与评价[D].长春:吉林大学,2015.Ma Q.Susceptibility analysis and assessment of the debris flow disaster in Jilin Province[D].Changchun:Jilin University,2015.
[7]徐慧娟,黄江成.基于关键驱动力的怒江州兰坪县泥石流危险性评价[J].云南大学学报:自然科学版,2015,37(2):240-249.Xu H J,Huang J C.Hazard assessment of debris flows in Lanping County of Nujiang Prefecture based on key driving force[J].Journal of Yunnan University:Natural Sciences Edition,2015,37(2):240-249.
[8]杨在月,王邦阳.云南省二道河泥石流治理工程效果分析及改进[J].地质灾害与环境保护,2016,27(1):22-26.DOI:10.3969/j.issn.1006-4362.2016.01.005.Yang Z Y,Wang B Y.Analysis effects of prevent project and improve of Erdao River debris flow in Weixi[J].Journal of Geological Hazards and Environment Prevention,2016,27(1):22-26.
[9]王邦阳.沟谷型泥石流形成、演化及治理方案研究[D].昆明:昆明理工大学,2016.Wang B Y.Research on the evolution and management of gully debris flow[D].Kunming:Kunming University of Science and Technology,2016.
[10]苟万春,李泳,王保亮,等.佳禾沟泥石流堆积物的粒度与强度关系分析[J].科学技术与工程,2015,15(35):120-123.DOI:10.3969/j.issn.1671-1815.2015.35.021.Gou W C,Li Y,Wang B L,et al.Analysis on grainsize characteristics and shear strength of the deposit in Jiahe Gully[J].Science Technology and Engineering,2015,15(35):120-123.
[11]闻满华.《中国地震动参数区划图》(GB18306-2015)编图方法在云南地区的应用实践[J].地震研究,2017,40(2):257-263.DOI:10.3969/j.issn.1000-0666.2017.02.012.Wen M H.Application practice of mapping method of seismic ground motion parameter zonation map of China(GB18306-2015)in Yunnan Area[J].Journal of Seismological Research,2017,40(2):257-263.
[12]汤沛,邱玉宝,赵志芳.合成孔径雷达(SAR)在地质、灾害应用研究中的新进展[J].云南大学学报:自然科学版,2012,34(S2):305-313.Tang P,Qiu Y B,Zhao Z F.The new progress of synthetic aperture radar(SAR)in geological and disaster researching[J].Journal of Yunnan University:Natural Sciences Edition,2012,34(S2):305-313.
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