| 新亚欧大陆桥新疆段环境地质灾害研究 |
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| 引用本文： | 陈亚宁,李卫红,杨思全,李向军,陈利军,尹永顺.新亚欧大陆桥新疆段环境地质灾害研究[J].干旱区地理,2001,24(1):30-36. |
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| 作者姓名： | 陈亚宁 李卫红 杨思全 李向军 陈利军 尹永顺 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所,
2. 中国科学院地理研究所, |
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| 基金项目： | 国家重点基础研究发展规划! (G19990 43 5 0 4)资助，中国科学院“西部之光”资助!项目 成果之一。 |
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| 摘 要： | 新亚欧大陆桥新疆段是我国西部重要生命线工程 ,横跨四大不同地貌单元 ,孕育了由暴雨山洪形成的水害、大风、沙害等为主要类型的环境地质灾害。重大水害事件形成于 2 5mm/h或≥ 30mm/d雨强过程中 ,集中出现在 7月份 ;大风刮翻列车的临界风速为 35m/s～ 6 7m/s之间 ,发生在山体豁口及呈“箱”型谷地的风口区 ;风沙流含沙量随高度遵循指数函数关系分布 ,在风向与线路夹角 >45°时 ,线路积沙厚度迅速增加。对各工务段辖属区段易损性分析表明 ,区段灾害活动强度依次为 :乌鲁木齐 >石河子 >奎屯 >柳园 >鄯善 >哈密。未来水害频次和强度将日趋增大 ,沙害范围及影响程度将日益加重。
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| 关 键 词： | 新亚欧大陆桥 新疆 环境地质灾害 时空分布 活动强度 灾害趋势 水害 沙害 |
STUDY ON THE ENVIRONMENT GEOLOGICAL HAZARDS ALONG XINJIANG SECTION OF NEW EURASIAN CONTINENTAL BRIDGE |
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| CHEN Ya ning,LI Wei hong,YANG Si quan,CHEN Li jun,YIN Yong shun.STUDY ON THE ENVIRONMENT GEOLOGICAL HAZARDS ALONG XINJIANG SECTION OF NEW EURASIAN CONTINENTAL BRIDGE[J].Arid Land Geography,2001,24(1):30-36. |
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| Authors: | CHEN Ya ning LI Wei hong YANG Si quan CHEN Li jun YIN Yong shun |
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| Institution: | CHEN Ya ning 1 LI Wei hong 1 YANG Si quan 1 CHEN Li jun 2 YIN Yong shun 3 |
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| Abstract: | Xinjiang section of New Eurasian Continental Bridge is an important lifeline project in west China. It bestrides four deferent physiographical units. Along the Xinjiang section of New Eurasian Continental Bridge, various disasters, such as flood, strong wind, sand disaster, roadbed disasters , often occur. Owing to these kinds of natural conditions, great events of flood disasters are often formed in the process of rain intensity of 25mm/d or more than 30mm/d. The disasters occur mostly in July. The critical wind speed turning over the train is in a range from 35m/s to 67m/s, which happen in draught place of mountain opening and trunk valley. The relationship between content and height of sand flow is in the form of index function. When the angle of wind direction and railway is more than forty five degrees, the thickness of accumulative sand along the railway increases rapidly. Though the vulnerability analysis on each section, it indicates that the intensity of hazards along the section is: Urumqi>Shihezi>Kuitun>Liuyuan>Shanshan>Hami, and the flood frequency and intensity will increase gradually in the future. The range and intensity of sand hazard is increasing gradually. |
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| Keywords: | New Eurasian Continental Bridge environmental geological Hazard temporal and spatial distribution active intensity hazard trend |
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