地质通报2013，Vol.32Issue(6)：893-898,6.
甘肃永靖黑方台地区灌溉诱发作用与黄土滑坡响应
An analysis of the inducing effects of irrigation and the responses of loess landslides in Heifangtai area
摘要
Abstract
Since irrigation started in Heifangtai,a great number of landslides have occurred.However,there have been rare analyses of the landslide history in Heifangtai.In this paper,the landslide history in Heifangtai was analyzed.On such a basis,the relationship between the rising process of the groundwater table and the landslide history was studied,with the purpose of analyzing the impacts of the groundwater table of different periods on corresponding landslide stabilities,landslide volumes,and the failure velocities of the posterior walls.The analyses of historical data show that there is obvious dependency between the rise of groundwater table due to irrigation and the frequency and volume of landslide.The stability calculation results of selected typical landslides show that the landslides have multiple-phase retrogressive characteristics.With the increase of irrigation time,the volumes of landslides gradually decrease while the frequencies of occurrences gradually increase.The deformation results derived from DEM-based calculation also verify the calculation results.The results basically inverse the historical process of loess landslides induced by irrigation and provide data supports for the comprehensive prevention and control of Heifangtai landslides.关键词
灌溉/黄土滑坡/黑方台地区Key words
irrigation/ loess landslide/ Heifangtai area分类
天文与地球科学引用本文复制引用
董英,贾俊,张茂省,孙萍萍,朱立峰,毕俊擘..甘肃永靖黑方台地区灌溉诱发作用与黄土滑坡响应[J].地质通报,2013,32(6):893-898,6.基金项目
中国地质调查局项目(编号:1212011014024)、国家科技支撑计划课题(编号:2012BAK10B02) （编号:1212011014024）
