Data content: Calculation and numerical model of overtopping dam failure of landslide dam established based on the breach mechanism (taking the Baige landslide as an example) Data source: numerical model based on Visual Studio code platform. Collection method: Based on the basic parameters of Baige landslide dam, calculation was carried out through the established model. Data quality description: firstly, the dam-break models proposed by previous scholars were compared and analyzed, and then the input parameters required by the Baige dam-break numerical model were substituted for calculation according to the actual Baige dam break process. The breach process simulation of the Baige landslide dam was obtained, and the simulation results were compared with the actual process for verification.
ZHANG Xinhua
Data content: Basic parameter data of dam breach process under different slope conditions Data source: through literature search, classification, consolidation and compilation. Description of data quality: Based on Jiang Xiangang's physical model test on dam breach with different bed slopes, the traceability erosion process of the dam body was analyzed in order to propose a traceability erosion model and explore the influencing factors of the traceability erosion process. In addition, this job attempts to quantify the undercut rate of the breach and the change rate of the downstream slope toe at each time. In order to find the relationship between them and obtain the calculation formula of the downstream slope angle, the calculation of traceability erosion was carried out. This can provide the basis for the calculation and analysis in the later stage of the project.
ZHANG Xinhua
Data content: Basic data of the Baige landslide dam Data source: literature search, field investigation (Baige dam site), institutional investigation (Ganzi Hydrological Bureau, Chengdu survey, design and Research Institute). Collection method: use camera to take site photos during field investigation; Consult the collection materials of relevant institutions to obtain the basic data of Baige weir plug dam. Data quality description: detailed hydrological data were obtained through institutional investigation, including the data of Batang and Gangtuo hydrological stations and the changes of water level and flow in front of the dam in Ganzi Hydrological Bureau. These data will provide important theoretical basis and reference for further analysis of outburst flood in the Qinghai Tibet Plateau.
ZHANG Xinhua
Data content: Storage capacity curve of the Hongshiyan, yibadao and xiaogangjian impoundment and flow hydrograph data of breach Data source: through literature search, classification, consolidation and compilation. Data quality description: through literature retrieval, data of four typical barrier lakes were compiled, including Hongshiyan barrier lake in Ludian, Yunnan, xiaogangjian (upper) barrier lake in Mianzhu County, Deyang City, Sichuan, and yibadao barrier lake in Mianzhu County, Deyang City, Sichuan. The basic parameters compiled here include: dam crest elevation, dam height, dam width and other basic parameters, as well as discharge channel parameters, dam grading, storage capacity curve, breach discharge hydrograph and other parameters, which were summarized and analyzed. It can provide a reference for the parameters of barrier lakes in the Qinghai Tibet Plateau.
ZHANG Xinhua
Data content: Investigation report on the impact of the discharge flood of the "11.3" Baige landslide-damming lake on the downstream area of the Jinsha River Data source: field survey (route: from the junction of the Baqu River (also known as the Bachu River) in Batang County to the reservoir area of Liyuan reservoir). Data quality description: the disaster situation in the lower reaches of Jinsha River was analyzed from three aspects: damaged bridges, damaged towns (hydrological stations) and ancient barrier lakes. For damaged bridges, record and analyze from the aspects of longitude and latitude, flood mark elevation, bridge deck elevation, bridge type, scouring and destruction, etc were conducted; For damaged towns and hydrologic stations, record and analyze the damage on both banks of the river through visit and investigation were conducted; For the ancient barrier lake, combined with the field investigation and Google Earth map, the formation process of the ancient barrier lake was deduced; For the grading map of pebble and sediment particle size taken by the camera, the pebble particle size in the typical area is generalized into ellipse, and the generalized particle size of pebbles with different sizes was extracted. Finally, the pebble particle size grading curve can be drawn.
ZHANG Xinhua
Data content: empirical formula calculation data of final bottom elevation of dam breach Data source: a large database containing 1230 dam cases around the world based on literature retrieval. Collection method: processing and fitting through Excel data processing software. Data quality description: in order to solve the problem of assigning the final bottom elevation of the dam breach, based on the collected data of dam height and breach depth in the dam database, combined with the classification method of overtopping breach dam body erosion proposed by briaud in 2008, the dams were divided into three types: high, medium and low erosion degrees. Then the dam height and breach depth of the dam plug dam with different erosion degrees were regressed, The empirical formula for the depths of dam breaches with different erosion degrees were also fitted, and then the final bottom elevations of dam breaches were determined.
ZHANG Xinhua
Data content: statistical analysis data of characteristic laws of large-scale landslide dams based on 1230 worldwide cases Data source: a large database containing 1230 dam cases around the world based on literature retrieval. Collection method: statistical analysis of the basic characteristics of landslide dam database through Excel, origin and other data analysis software and drawing software. Data quality description: Based on the established large-scale dam database, the distribution, inducement, service life, shape, collapse and other characteristics of dams at home and abroad were statistically analyzed. The correlation analysis of some characteristics was carried out, such as the correlation analysis of geological causes and service life of landslide dam, the correlation analysis of inducing factors and geological causes of landslide dam.
ZHANG Xinhua
Data content: A large database of 1230 worldwide dam cases Data source: through literature search, classification, consolidation and compilation. Data quality description: classify and sort out the historical cases of weir plug dam from two aspects: qualitative description and quantitative description. The qualitative description includes the country, the name of the dam, the formation time, the type of landslide, the inducing factors, the type of dam body, the mechanism of collapse, etc; Quantitative description includes landslide volume, dam volume, dam height, dam length, dam width, barrier lake length, barrier lake volume, barrier dam life, breach depth, breach top width, breach bottom width, breach time, peak flow, casualties, etc.
ZHANG Xinhua
Data content: Taking Baige landslide in 2018 as an example, the numerical simulation of typical river-blocking landslide was carried out Data source: the numerical simulation data were collected and recorded by computer software (massflow developed by Mountain Institute of Chinese Academy of Sciences). Data quality description: the data were mainly image JPG and video GIF files, which were processed by video editing and image processing software. Data application results: Taking the latest river blocking landslide as a case, the numerical simulation of typical river-blocking landslide will provide a theoretical basis for the evaluation of the disaster effect of river blocking landslide in the deep valley area developed from similar strata and slope structure.
XU Nuwen
Data content: this data used the open source code ESYS-Particle to simulate the interaction between debris flow and slit dam Data source: this numerical simulation data was collected and recorded by computer software (using open source code ESYS-Particle). Data quality description: the data were mainly images and video GIF files, which were processed by video editing and image processing software. Data application: four basic interaction stages of debris flow impacting slit dam were revealed: initial impact stage, uplift stage, accumulation stage and deposition stage. The interception efficiency of slit dam with different relative column spacing to particles of different shapes was analyzed.
XU Nuwen
Data content: Taking Baige landslide in 2018 as an example, this data simulated the down-hill migration and accumulation process of debris flow on the slope Data source: this numerical simulation data was collected and recorded by computer software (using open source code ESYS-Particle). Data quality description: the data were mainly images and video GIF files, which were processed by video editing and image processing software. Data application results: Taking the latest Dujiang landslide as an example, the simulation of the downward migration and accumulation process of debris flow along the slope will provide a theoretical basis for the evaluation of landslide disaster effect from the development of similar strata and slope structure.
XU Nuwen
Data content: monitoring of water level and flow velocity of dam break, and analysis of Froude number and flow process Data source: the data collection place is Sichuan. The experimental analysis was mainly completed in Sichuan University and Chengdu Ruyi Instrument Co., Ltd. The instruments used include high-speed camera, wave altimeter, electronic pressure measuring tube, pressure sensor, mechanical timer, etc. The collection time is 2021. Acquisition method: observe the process of field large-scale dam burst test through multiple high-speed cameras, wave altimeters, total head pressure sensors, mechanical timers and other instruments. Data quality description: relevant sensors were arranged in the field test, and real-time process dynamic observation was carried out. A total of 6 large-scale test conditions were observed, including water level and flow rate observation at 400 points. Then, Froude number and flow process were calculated and analyzed through flow rate and water level.
NIU Zhipan
Data content: Monitoring of seepage infiltration line and analysis of seepage infiltration degree of dam break Data source: the data collection place is Sichuan. The experimental analysis was mainly completed in Sichuan University and Chengdu Ruyi Instrument Co., Ltd. The instruments used included high-speed camera, wave altimeter, electronic pressure measuring tube, pressure sensor, mechanical timer, etc. The collection time is 2021. Acquisition method: according to the indoor test, observe the evolution process of seepage development in the process of dam break of weir plug dam through electronic piezometer, pressure sensor and high-speed camera. Data quality description: carry out the stability model test of dam with different structures, and carry out the indoor test. According to the grading requirements of 14 working conditions, pile the dam body on the bottom plate of the water tank, and arrange multiple cameras to observe. During the process of clean water flowing into the water tank to wash the dam until the end of dam break, observe the coordinates of the infiltration process, and record the change process of the infiltration coordinates with time.
NIU Zhipan
Data content: spatial distribution, development mechanism and point database of river-blocking landslide in the Three Rivers region Collection scheme: First carry out Google Earth remote sensing interpretation, then carry out field verification and improve the interpretation signs in combination with field verification. Then carry out detailed interpretation, and collect the scale and geomorphic data including landslide source area, movement area and accumulation area. Then study and analyze the typical cases of river-blocking landslide, This reveals the engineering geological classification and genetic mechanism of river-blocking landslide in the Three Rivers rigion. Collection location: Sanjiang area of Qinghai Tibet Plateau and Sichuan University Collection time: October 1, 2018 to October 31, 2021
DENG Jianhui , ZHAO Siyuan
1) The data content includes: high-speed friction test data of rock mass structural plane in the sliding source area of typical high-speed remote landslide, physical simulation test data of high-speed remote landslide fragmentation, high-speed ring shear test data of sliding belt in the circulation area of typical landslide, fine particle migration and reverse order physical simulation test data in the accumulation area of landslide, high-speed remote landslide numerical simulation system and evaluation data. 2) Data source and processing method: test data collection. 3) Data quality description: good - General. 4) Data application achievements and prospects: it can be used to study the initiation, movement and accumulation mechanism of high-speed and long-distance rock landslide in Qinghai Tibet Plateau, and simulate the whole process of landslide movement.
WEN Baoping
The evaluation area of the data set is the Qinghai Tibet Plateau. The data set is based on the spatial distribution data set of geological hazard risk, earthquake risk, flood risk and freeze-thaw risk, with weights of 0.25, 0.4, 0.15 and 0.05 respectively. The disaster risk is divided into five levels, representing extremely low, low, medium, high and extremely high risk levels respectively. Finally, the risk evaluation results of multiple disasters in the Qinghai Tibet Plateau are obtained. Using the investigation data and public data, the multi disaster risk data of the Qinghai Tibet Plateau are obtained by weighted analysis of each single disaster risk data in ArcGIS.
LIU Lianyou
The data set uses the multi disaster risk assessment model for livestock in the Qinghai Tibet Plateau (Ye et al. 2019) to simulate the livestock deaths caused by the comprehensive superposition impact of multiple disasters on livestock, such as winter snow disaster, strong wind, low temperature, high altitude hypoxia and summer drought, and evaluate the expected annual deaths. The data can provide information on the death risk of multi disaster livestock around the Himalayas and the Asian water tower area. The data comes from China Meteorological science data sharing service system cn05 1. National Qinghai Tibet Plateau data center, Qinghai Tibet Plateau multi-source remote sensing synthetic 1km snow cover data set (1995-2018), mod13q1.006 vegetation index data, SRTM 1 arc second global elevation data.
YE Tao
This data combines the direct economic loss risk assessment results of earthquake and geological disasters. According to the obtained loss assessment results, the study area is divided into nine categories according to the risk level, which are seismic geological low-risk area, geological medium seismic low-risk area, seismic medium geological low-risk area, seismic geological medium risk area, geological high epicenter risk area and seismic high quality low-risk area, Geological high seismic low risk area, seismic high quality low risk area and seismic geological high risk area. The data results of this multi disaster direct economic loss risk assessment provide a basis for the spatial distribution of direct economic losses in the Asian water tower area and the surrounding areas of the Himalayas in the future.
WU Jidong
This data includes the seismic data of the Qinghai Tibet Plateau, the Asian water tower region and the Himalayas region from 1971 to 2021, The main attributes include earthquake occurrence time (UTC), longitude, latitude, earthquake depth, magnitude, magnitude type and occurrence area. It is divided into shp files and tabular data, which can be more convenient for relevant personnel to use. This data can help relevant personnel understand the earthquake distribution on the Qinghai Tibet Plateau and interpret the relationship between earthquake occurrence location and relevant structural zones. This data is derived from https://earthquake.usgs.gov/data/pager/ , download by selecting the initial target area and time, export by using ArcGIS tools, filter and make according to the edited files of the scientific research area of the Qinghai Tibet Plateau.
LIU Jifu
Based on the concept of Height Above Nearest Drainage ( HAND ) derived from the international digital elevation model, the HAND model was used to identify the flooded area, and the spatial distribution of flood hazard level in the flood area of the study area was established. Flood hazard in the study area is divided into 1-5 grades, of which 5 represent very high risk, 4 represent high risk, 3 represent medium risk, 2 represent low risk, 1 represent very low risk.
CHEN Bo
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