【摘要】 东山四沟泥流活动频繁 ,严重威胁环县城区 1 .4万人生命和 1 .6亿元资产安全。对其采取了以均质黄土坝、排导槽、沟头防护墙和涝池等工程措施与植树造林、水平梯田和柳谷坊等生物措施相结合的综合治理方案。更多还原

【Abstract】 Huanxian county town in northeast of Gansu province is seriously endangered by Dongshan mudflow disasters. Since 1949, the loess_slurr flow in Dongshan has broken out 27 times and resulted in 30 million yuan economic losses of properties. The formation conditions such as the typical loess hilly and ravine topography, aboundant landslides. falls and collapses in gullies, and high intensity rainfall are extremly advantageous for formation of mudflow. In order to effectively protect Huanxian county town villages, farmland and No.211 National Highway against mudflow hazards, one comprehensive prevention countermeasure has been put forward, which includes 7 soil blocking dams, 2 mudflow division flumes. 500_meter_long runoff retaining wall, 6 artificial waterlogging pools so on engineering measures and 100 willow_stake low dams, 33.3hm 2 of horizontal terraced fields and 34hm 2 of tree planting. After the works finished, mudflow will become usual flood torrent, and its threat to Huanxian town will be eliminated.更多还原