青海尖扎盆地寺门村滑坡发育特征及成因分析

滑坡形成演化及复活一直是滑坡防灾减灾领域研究的热点问题。本文在对黄河上游尖扎盆地地质环境背景分析和滑坡体野外调查、遥感解译、实验测试的基础上，分析研究了盆地内寺门村滑坡的变形过程、滑带土和堆积体特征，还原了滑坡的演化过程，厘定了滑坡复活因素，提出了黄河上游滑坡堆积体开发利用对策建议，认为（1）该滑坡是2005年之前发生的老滑坡因河流侧蚀和2018年春季人工灌溉引发的复活性滑坡；（2）滑坡体综合治理应与土地整治相结合且应选择合适的灌溉方式。研究结果对于青藏高原东北缘黄河上游地区的滑坡防灾减灾及滑坡体开发利用具有重要意义。

Characteristics and formation of Simencun Landslides in Jianzha Baisn of Qinghai Province

Landslide formation, evolution and resurrection have been a hot topic in the field of landslide disaster prevention and mitigation. In the paper, based on analysis of the geological environment background and field survey, remote sensing interpretation, and experimental testing of large-scale landslides in the Jianzha Basin on the upper Yellow River, then taking the Simencun Landslide on the southern bank of the Yellow River in the basin as an example, the deformation process, characteristics of the landslide slip zone soil and accumulated body are discussed, the landslide formation process are reduction and reactive factors determined. Finally, some suggestions for the development and utilization of landslide deposits in the upper reaches of the Yellow River are put forward. It is believed that:(1) The landslide that was the old landslide occurred before 2005, which reactivated by the river-side erosion and artificial irrigation in spring 2018.(2) Comprehensive management of landslides should be combined with land remediation and appropriate irrigation methods should be selected, which is of great significance for landslide disaster prevention and mitigation and landslide body development and utilization in the upper reaches of the Yellow River on the northeastern part of the Tibetan Plateau.