青藏铁路格拉段风沙危害及其防治

被引：39

作者：

张克存

屈建军

姚正毅

韩庆杰

牛清河

机构：

[1] 中国科学院寒区旱区环境与工程研究所敦煌戈壁荒漠生态与环境研究站,沙漠与沙漠化重点实验室

来源：

干旱区地理 | 2014年 / 37卷 / 01期

关键词：

青藏铁路; 风沙危害; 防沙措施;

D O I：

10.13826/j.cnki.cn65-1103/x.2014.01.017

中图分类号：

U216.413 [];

学科分类号：

0814 ; 082301 ;

摘要：

青藏铁路地处高寒低压环境,地表风沙危害形成过程与干旱、半干旱沙漠和戈壁地区有较大差异。青藏铁路沿线多大风、风力强劲、风向相对单一,主导风向以西风为主;各站点年输沙势DP均高于400 VU,属于高风能环境,合成输沙方向间于85.8°89.8°;"风旱同季",风水复合侵蚀和冻融作用时空交错,地表抗蚀能力差,从而加剧了铁路沿线风沙活动强度。通过对青藏铁路沿线风沙灾害特点、风动力环境、工程防沙措施及其防护机理等分析,提出了青藏铁路沿线风沙危害防治原则和防护体系:应逐步建立以阻沙栅栏、砾石方格、化学固沙、植被恢复相结合的综合防治体系。

引用

页码：74 / 80

页数：7

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