This dataset includes boundary and topographic data of Southeastern Tibetan Plateau (SETP): 1. SETP_ Boundary: we centered on the traditional SETP region (i.e., the Parlung Tsangpo River basin or Bomi County) and used the surrounding river network (e.g., the Yarlung Zangbo-Brahmaputra River, Nujiang-Salween River, and their tributaries) to delineate the boundary of the SETP. This region covers the Eastern Nyainqentanglha Ranges, Eastern Himalayas, and Western Hengduan Mountains and hosts the largest maritime glacier concentration across China. 2. Topographic data: Based on NASADEM provided by NASA Earthdata, we mosaicked the DEM, slope, aspect, profile curvature (profc) and water Mask (SWB) of SETP. 3. Hillshade: We produced the hillshde with a altitude angle of 45° from the NASADEM of SETP.
ZHAO Fanyu, LONG Di, LI Xingdong, HUANG Qi, HAN Pengfei
Based on a large number of field investigations and laboratory tests, according to the physical parameters of different debris flow deposits on site, the viscosity range of debris flow slurry and the solid particle gradation of debris flow are determined. Through the test, the water and soil ratio of slurry in different viscosity range is determined, and debris flow slurry with different viscosity is configured according to the water and soil ratio. Through the screening test, the solid particle gradation of debris flow is determined. Considering the different combinations of three factors of debris flow slurry viscosity, solid ratio and particle gradation, the debris flow siltation bodies in different states are manually configured, and the bearing capacity test of debris flow siltation bodies is carried out to study the consolidation characteristics and temporal and spatial variation characteristics of bearing capacity of debris flow siltation bodies with different viscosity, solid ratio and particle gradation.
LIU Bin , SU Na , XU Linrong , CHEN Hongkai
This sub topic obtains the physical and mechanical indexes of sliding zone soil and bedrock of typical major landslides (zanong landslide, zongrongcun landslide and xiaguiwa landslide) in Jinsha River Basin of Qinghai Tibet Plateau. The physical and mechanical indexes of sliding zone soil are mainly obtained by large-scale direct shear test. The obtained physical and mechanical indexes provide a scientific basis for subsequent physical model tests and revealing the internal and external dynamic coupling mechanism. The shear strength test of sliding zone soil adopts large-scale direct shear instrument, and there are three groups considering different moisture content. In the large-scale direct shear test, the remolded sliding zone soil specimens with different moisture content are made for three typical landslides respectively, and the shear strength normal pressure relationship curve of sliding zone soil with different moisture content is obtained, and then the shear strength index of sliding zone soil with different moisture content is obtained.
YAO Aijun
This sub topic obtains the physical and mechanical indexes of bedrock of typical major landslides (zanong landslide, zongrongcun landslide and xiaguiwa landslide) in Jinsha River Basin of Qinghai Tibet Plateau. The physical and mechanical indexes of bedrock are mainly obtained through point load test. The obtained physical and mechanical indexes provide a scientific basis for subsequent physical model test and revealing the internal and external dynamic coupling mechanism. The strength test of typical landslide rock block adopts point load instrument, with no less than 15 specimens in each group, a total of 5 groups. There are five kinds of rock samples for point load test, namely limestone, ophiolite, mica gneiss, diorite and schist. Among them, diorite is loaded in cylindrical radial direction, and the rest are irregular rock samples. The size of the experimental results is corrected, and the experimental state is natural water content.
YAO Aijun
The research on mixing different types of curing agents into debris flow siltation body has great engineering significance. It can not only make up for the deficiency of previous research on the curing characteristics of debris flow siltation body, but also provide a scientific basis for solving the difficulty of debris flow rescue and dredging the main traffic roads in time to a certain extent. In order to study the solidification characteristics of debris flow sediment, Central South University carried out indoor debris flow sediment solidification experiments to study the variation law of bearing capacity of debris flow sediment under the action of different types and different amounts of cement curing agent under the conditions of different gradation and different moisture content, so as to provide reference basis for better handling emergency rescue.
SU Na
The abrasion characteristics of debris flow are the key parameters for the durability design of prevention and control engineering. In this project, 44 working conditions of 5 kinds of gravel gradation, 4 solid ratios, 3 kinds of slurry viscosity of debris flow, 2 kinds of debris flow velocity and 2 kinds of concrete strength are selected. The debris flow abrasion test is carried out with the self-developed debris flow abrasion test device to examine the concrete loss rate Changes of abrasion rate and surface morphology. The experimental results show that the loss rate and abrasion rate of concrete increase with the grading number of gravel (the content of large particle gravel increases), the solid ratio of debris flow and the viscosity of debris flow. According to the developed debris flow abrasion test device, the debris flow abrasion test of concrete materials is carried out, the debris flow abrasion test results are obtained, and the debris flow abrasion coefficients of different concrete materials are obtained
JIAO Pengpeng , SU Na , XU Linrong
Experimental data of impact force of debris flow block stone. The yield stress of impact medium, particle size of impact medium, impact force of block stone and other data produced by the impact force model test of debris flow block stone carried out in the State Key Laboratory of geological disaster prevention and geological environment protection; The data collection place is the State Key Laboratory of geological disaster prevention and geological environment protection of Chengdu University of technology. The data are obtained through the impact force model test of debris flow blocks. The main instruments used include HAAKE rotary rheometer mars40 / 60, HD camera, qsy8301-01 piezoelectric sensor, etc. the collection time is 2019-2021.
LIU Qinghua , SU Na , XU Linrong
The effects of different control factors such as clay content, width height ratio, upstream inflow flow and initial water content on the collapse of gully blocking landslide material source are studied. Through the analysis of the collapse process of weir plug body, the collapse modes of weir plug body are classified. This paper summarizes the longitudinal evolution law of dam body contour under different failure modes, calculates the flow depth, flow velocity and erosion rate, analyzes the temporal and spatial evolution process of dam body under different failure modes, discusses the effects of different factors on the gravity of dam break debris flow and peak discharge, and establishes the mathematical model of dam break discharge amplification coefficient of weir plug dam, Two plugging points in the study area and one plugging point in Ginkgo Pinggou are selected for verification, but there are some limitations in practical application due to the complexity of weir plug dam failure.
ZHANG Youyi
A large number of engineering practices show that the total amount of slope material sources and dynamic reserves account for a large proportion of the total amount of material sources in the basin, which is an important source of debris flow after the earthquake. Through the indoor model test, this paper analyzes the sensitive factors of slope material source rainfall start-up, compares and analyzes the estimation results of slope material source dynamic reserves by engineering experience method and RUSLE model, and reveals the influence of slope re greening herb vegetation on slope material source seepage field through numerical simulation analysis on the basis of indoor model test.
ZHANG Youyi
Aiming at the material source of "wide, gentle" and "narrow and steep" debris flow gully, based on field investigation and indoor rock and soil mechanical parameter test, this study uses indoor model experiment to study the starting mechanism of loose material in gully under different influencing factors. Through data analysis and fitting, the dynamic reserve model of gully provenance is established, which provides reference and scientific basis for the prediction, early warning and treatment engineering design of similar debris flow gully in earthquake area. The main conclusions are as follows: (1) The incipient erosion processes of deposits with different structural types are different: fine-grained soil appears rills at the front edge after the start of runoff at the rear, and gradually develops into pull grooves, which run through to the rear edge; After the runoff of coarse-grained soil starts, the front edge collapses and slides, showing the characteristics of traceability erosion; The upper fine and lower coarse soil first formed grooves at the boundary of soil layer and gradually extended to the rear edge; The upper coarse and lower fine soil first form a rill at the front edge, and the coarse soil in the back layer slides and scrapes the fine soil at the front edge. (2) At the moment of debris flow starting, coarse particles are mainly started in the form of sliding, jumping and rolling, and the starting and migration forms of coarse particles in fine-grained soil are mainly rolling and jumping; In coarse-grained soil, the coarse particles are mainly started by sliding; The confluence of upper fine and lower coarse soil is dominated by rolling and jumping in the early stage, and sliding in the later stage; The coarse particles in the upper coarse and lower fine soil start mainly by sliding. (3) The greater the rainfall intensity, the greater the runoff, and the stronger the undercutting erosion. The erosion curve tends to increase first and then decrease, and the maximum erosion depth generally appears at the place where the slope changes steeply and gently. (4) Based on the indoor simulation test results and fractal dimension theory, the evaluation model of "wide and slow" channel source dynamic reserves is established and verified.
ZHANG Youyi
The researchers of the research group carried out field investigation on the typical "wide and gentle" gully debris flow gully - Wenchuan Qipan gully and "narrow and steep" gully debris flow gully - Beichuan Qinglin gully branch. Through the field particle screening test of typical channel deposits in qipangou, and the qualitative and quantitative description of channel shape and typical channel section, it is found that the wide and gentle channel material source has the characteristics of "wide gradation, weak consolidation and easy stratification"; In addition, the debris flow accumulation samples of Qinglin gully branch gully are selected for on-site particle screening test, and the clay content, porosity and shear strength of the test soil samples are determined.
ZHANG Youyi
On the basis of field scientific research, this parameter set integrates the parameters of debris flow disaster chain and landslide disaster chain observed along important roads in Himalayan and Hengduan Mountains. The regional scope covers Nyingchi, Shannan, Bomi, Basu, Shigatse, Ali and other regions of the Tibet Autonomous Region, as well as the East Asia rift valley of the China India channel. The source and mode of data production are processed according to the original data obtained from field scientific investigation. This parameter set is mainly based on the field investigation to determine the location and type of disaster and disaster chain, the damage of major highway projects and other information, and then sorted into tables and shp files. It is hoped that this data can provide help for disaster prevention and reduction of road projects in the Qinghai Tibet Plateau.
DENG Hongyan
On the basis of satellite image recognition, this data set catalogues and photographs the debris flow disaster chain and landslide disaster chain observed in the Himalayas and its surrounding areas; And fill in the data form, scientific examination log file and distribution map. Discipline scope of this data set: information and system science related engineering and technology - > systematic application of information technology - > geographic information system. This data mainly determines the location and type of disaster and disaster chain through field investigation, and then arranges it into tables and generates original data such as vector data and scientific research logs. The field scientific research areas include Nyingchi, Shannan, Bomi, Basu, Shigatse, Ali and other areas of the Tibet Autonomous Region, and the South-North rift areas such as Yadong, Nyalam, Chentang village, Jilong and Pulan of the South Asia channel.
DENG Hongyan
This database includes slope, aspect and digital elevation model (DEM) data of Qinghai Tibet Plateau. The data comes from the 30m * 30m resolution numerical elevation model data downloaded from the geospatial data cloud website. Using the surface analysis function of ArcGIS software, the slope and aspect information of the Qinghai Tibet Plateau are extracted. The data has been rechecked and reviewed by many people, and its data integrity, position accuracy and attribute accuracy meet the standards, with excellent and reliable quality. As one of the engineering geological conditions, this data is the basic data for the research on the development law of major engineering disturbance disasters and major natural disasters in the Qinghai Tibet Plateau and the analysis of susceptibility, risk and risk.
QI Shengwen
This data is the disturbance disaster data of 1:250000 major projects in the Qinghai Tibet Plateau. For the scope of disaster interpretation, line engineering (national highway, high-speed, railway and Power Grid Engineering) and hydropower engineering are bounded by the first watershed on both sides of the project; Mine, oilfield and port projects are bounded by 1km away from the project. Engineering disturbance disasters can be divided into two categories: ① landslide, collapse and debris flow disasters induced by engineering construction; ② For natural disasters that may affect the project, it is stipulated that all natural disasters within the above interpretation scope belong to category ② engineering disturbance disasters. The data includes the location, length, width, height difference, distribution elevation, genetic type, inducing factors, occurrence time, lithology and other elements of landslide, disaster related projects and project construction years. Based on Google Earth image and 1:500000 geological diagram, 6176 disaster points were interpreted; Google Earth is mainly used for disturbance disaster interpretation, and combined with field investigation to verify the interpretation results, ArcGIS is used to generate disaster distribution map; The data comes from Google Earth high-resolution images, with high accuracy of original data. In the process of generating disaster files, the interpretation specifications are strictly followed, and special personnel are assigned to review, so the data quality is reliable; Based on the collected data, the disaster risk analysis of the study area can be carried out to provide theoretical guidance for the smooth operation of the built projects and the construction of the line projects not built / under construction.
QI Shengwen
The types and distribution data sets of major projects in the Qinghai Tibet Plateau mainly include major hydropower projects, major road projects, major mining projects, major port projects and oil field projects. Among them, road projects include national highway, high-speed, railway and power grid projects, and hydropower projects are mainly the project point documents of hydropower station dam site. The data is obtained through data collection and remote sensing image interpretation. The main attributes of the project data are project naming (naming method is project type - project name - project construction year, in which the naming method of hydropower project is project type - watershed name - project name - Project storage year), project construction year, related projects and other characteristics. The data has been checked and modified for many times, and the quality is reliable.
QI Shengwen
The single mineral EPMA data set of magmatic rocks in the Himalayan orogenic belt is mainly based on the main data of single minerals in Jilong area, and the test points of single minerals are more than 200. The rock is light colored granite. The single minerals tested are mainly feldspar, garnet, muscovite and biotite. The single mineral electron probe uses cameca sxvivefe electron microprobe, etc. The data has not been published, and the data results are true and reliable. The testing units are mainly the Institute of geology, Chinese Academy of Geological Sciences and the Institute of mineral resources, Chinese Academy of Geological Sciences. The data set can be used to study the petrogenesis of leucogranite melts in the Himalayan orogenic belt.
ZENG Lingsen , GAO Lie , YAN Lilong
The data is based on the 1:500000 geological map of the Qinghai Tibet Plateau, Refer to the national standard engineering rock mass classification standard (gb50218-2014) rock saturated uniaxial compressive strength UCS and its corresponding representative rocks are divided into five categories: hard rock group, harder rock group, weaker rock group, weak rock group and loose rock group. Engineering geological rock group is the main material component of rock and soil mass, the basis of engineering design, the necessary condition for evaluating the engineering stability of rock and soil mass, and can be used as The evaluation factor of disaster risk analysis avoids the difficulty of risk evaluation caused by too many lithology types, and can be applied to major engineering construction and disaster risk analysis in the Qinghai Tibet Plateau in the future.
QI Shengwen
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