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Ding W.-C.,Chinese Academy of Geological Sciences | Li T.-D.,Chinese Academy of Geological Sciences | Li T.-D.,Jilin University | Fan B.-X.,Chinese Academy of Geological Sciences | And 5 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2012

The research took Hainan Island as the example, shows how to carry out 1:500000 3D hillshading geological mapping based on DEM and by jointly using the Global Mapper, ArcGIS and MapGIS softwares. Firstly, make automatic registration between SRTM DEM data and 1:500000 vector geographic data under different map parameters; secondly, overlapped the geological elements with the DEM; third, rectified the geological dividing line of Quaternary System, realized the production of the 1:500000 Hainan Island 3D geological mapping. The present research also summarizes the methods about data conversation between different ellipsoid bodies and coordinate system, about filling up the black area of the DEM data and production the 3D geological map and so on. The DEM data used in the research satisfy 1:500000 geological mapping requirement, and the 3D geological map has enhanced the stereoscopic effect and readability of the map, improved the accuracy and information of geological maps, and made the map more clear in three-dimensional geological structure when compared with the traditional geological map. It can provide a new method and way for Chinese geological mapping and for other 3D maps production. Source

Ding W.-C.,Chinese Academy of Geological Sciences | Yang Q.,Center for Hydrogeology and Environmental Geology of | Wang A.-J.,Center for Hydrogeology and Environmental Geology of | Gao Y.-L.,Center for Hydrogeology and Environmental Geology of | Zhang J.-Y.,Center for Hydrogeology and Environmental Geology of
Geology in China | Year: 2010

Geological hazards often cause grave damages to people's lives and property, and hence the study of the meteorological early-warning for geological hazards has practical significance. With Lingtai County of Gansu Province as an example, this paper elaborates the research on meteorological early-warning based on GIS and the good results obtained. Starting with the intrinsic and extrinsic factors that cause the loess geological hazards, the authors carried out the study of geological hazards liability zoning in Lingtai County (intrinsic factors), and then, with a full consideration of the impact of rainfall on geological hazards (external factors), conducted the geological hazards meteorological early-warning zoning study. The authors employed the critical-day synthesized effective process of the rainfall criteria precipitation method in the key and secondary warning zones of Lingtai County. Good prediction results were obtained, which indicate that, being practical and effective, this method can provide a scientific basis for the further study of geological hazards meteorological early-warning in the loess region. Source

Yingjie S.,Center for Hydrogeology and Environmental Geology of | Qiang L.,Center for Hydrogeology and Environmental Geology of | Gang L.,Center for Hydrogeology and Environmental Geology of
Proceedings - 2014 5th International Conference on Intelligent Systems Design and Engineering Applications, ISDEA 2014 | Year: 2014

Jingning County is located in the transition zone of Liupan Mountains and Loess Plateau including East and West Gansu. Its geomorphology is typical loess hilly-gully region. Through analyzing the detailed investigation results of geological hazards in Jingning County, some elements of geological hazards which contain main types, size, developmental characteristics, spatial and temporal distribution are summarized. According to further analyzing formation conditions of geological hazards such as topography, geomorphology, stratum structure, rainfall, earthquake and human engineering activities, the evaluation of geological hazards' prevention division is conducted in Jingning County. Based on the evaluation results, prevention of geological hazards in Jingning County which should be gradually performed in the light of prevention stage and prevention grade is proposed. Also the further prevention suggestion is given. © 2014 IEEE. Source

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