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Objectives: In 2015, the Mw 7.8 earthquake in Nepal caused landslides and seriously impacted Nepal and its surrounding areas. Methods: In this paper, the Sindhupalchowk area, which is close to the epicenter of the earthquake, is selected as the study area. First, based on the L-band ALOS-2 and C-band Sentinel-1A synthetic aperture radar data, the detection and identification of post-earthquake landslides are carried out by using stacking-InSAR(interferometric synthetic aperture radar) technology. Second, the two-dimensional time series deformation characteristics of a typical landslide are obtained by combining the ascending and descending orbit data and multi-dimensional small baseline subset-InSAR technology. Results: Combined with optical images, 14 hidden points of landslide are delineated. The main deformation of the typical landslide occurs in the horizontal east-west direction, and the maximum deformation rate is −69 mm/a. Conclusions: By analyzing the trend and periodic term deformation signals in time series of the typical landslide, it is found that the earthquake has a significant acceleration effect on the landslide movement, and the increase of rainfall makes the landslide displacement show a periodic change from August to November every year. This paper can provide a reference for post-earthquake landslide monitoring re⁃ search. [ABSTRACT FROM AUTHOR]

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With the advancement of "The Belt and Road", hydropower development is an important strategic measure of the Nepalese government. Nepal has complex regional structure and geological condition. Based on the engineering experience of several hydropower stations in Nepal, this paper summarizes the key points of the geological investigation of Nepal hydropower station. As the main method of geological investigation in Nepal, geological mapping can analyze the main geological problems of the project. With the method of combining geological observation point and UAV technology, the geological information of the engineering area from macro to micro can be obtained, and the work efficiency and accuracy of geological mapping can be improved. The deep overburden is the key and difficult point of the geological investigation of Nepal hydropower station. To find out geological problems of deep overburden, a variety of investigation methods are required. In the deep overburden exploration, mud and SM natural plant gum are used as the drilling fluid and SD single-acting double-tube two halves tube drilling tool is used for rotary drilling, which can effectively improve the core recovery percent and work efficiency. The engineering experience summarized in this paper is worth for geological investigation of similar projects in Nepal as reference.