| 宝天高速公路西段大(暴)雨引发泥石流危险程度评价 |
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| 引用本文： | 姚小英,蒲金涌,田广旭,尤志刚,朱恩超.宝天高速公路西段大(暴)雨引发泥石流危险程度评价[J].冰川冻土,2010,32(6). |
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| 作者姓名： | 姚小英 蒲金涌 田广旭 尤志刚 朱恩超 |
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| 作者单位： | 中国气象局,兰州干旱气象研究所,中国气象局,干旱气候变化与减灾重点开放实验室,甘肃省干旱气候变化与减灾重点实验室,甘肃,兰州,730020;天水市气象局,甘肃,天水,741000;甘肃省天水农业气象试验站,甘肃,天水,741020;甘肃省陇南市气象局,甘肃,武都,746000;天水市气象局,甘肃,天水,741000 |
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| 基金项目： | 甘肃省气象局"十人计划"项目，国家科技部公益行业专项 |
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| 摘 要： | 大(暴)雨可能引发的泥石流等地质灾害,是宝天高速公路西段安全运行的最大威胁.根据宝天高速公路西段1965-2008年麦积国家基本气象站、街子气象哨降水资料及1980-2008年天水农业气象试验站历年土壤水分含量观测资料,分析了宝天高速公路沿线降水、大(暴)雨及土壤含水量分布规律,建立了大(暴)雨引发泥石流可能发生的危险性的评价模式.结果表明:天宝高速公路西段是地质灾害高危险区,也是天水市地区的大(暴)雨中心.自20世纪60年代以来,宝天高速公路段的年降水呈20 a周期变化,大(暴)雨出现次数与年降水量距平百分率呈正相关.大(暴)雨的出现具有明显的季节性,在大(暴)雨出现的4-10月,100 cm土层土壤最大水分容纳量为86~172 mm,40 cm土层为41~69 mm.大(暴)雨引发泥石流的危险性7月最高,4月最低.7-10月泥石流发生的危险程度高于4-6月,主汛期是该线路段泥石流等地质灾害的重点防御时段.
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| 关 键 词： | 宝天高速公路 大(暴)雨 引发 泥石流 评价 |
Assessment of the Risk of Debris Flow Triggered by Heavy (Torrential)Rain along the West Section of Baoji-Tianshui Expressway |
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| YAO Xiao-ying,PU Jin-yong,TIAN Guang-xu,YOU Zhi-gan,ZHU En-Chao.Assessment of the Risk of Debris Flow Triggered by Heavy (Torrential)Rain along the West Section of Baoji-Tianshui Expressway[J].Journal of Glaciology and Geocryology,2010,32(6). |
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| Authors: | YAO Xiao-ying PU Jin-yong TIAN Guang-xu YOU Zhi-gan ZHU En-Chao |
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| Institution: | YAO Xiao-ying1,2,PU Jin-yong3,TIAN Guang-xu4,YOU Zhi-gan2,ZHU En-Chao2(1.Institute of Arid Meteorology,China Meteorological Administration Key Laboratory of Arid Climatic Change and Reducing Disasterof Gansu Province,Key Open Laboratory of Arid Change and Disaster Reduction of CMA,Lanzhou China 730020,China,2.Tianshui Meteorological Bureau,Tianshui Gansu 741000,3.Agrometeorological Experimental Station of Tianshuiin Gansu Province,Tianshui Gansu 741020,4.Longnan Meteorology Bureau,Wudu Gansu 746... |
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| Abstract: | The debris flow and other geologic hazards triggered by heavy(torrential) rain is a remarkable natural disaster along the west section of Baoji-Tianshui Expressway.Based on the precipitation data at Maiji Weather Station and Jiezi Meteorological Post from 1965 to 2008,and data of soil water content at Tianshui Agrometeorological Experiment Station from 1980 to 2008,the distribution characteristics of annual precipitation,heavy(torrential) rain and soil water content were analyzed and a model for evaluating ... |
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| Keywords: | Baoji-Tianshui Expressway heavy(torrential) rain trigger debris flow assessment |
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