Yang N.,Beijing Institute of Geological Engineering |
Yuan Q.L.,Beijing Institute of Geological Engineering |
Sun L.,Peking University |
Zhou J.,Appraisal Center for Environment and Engineering |
Li S.J.,Beijing Institute of Geological Engineering
Advanced Materials Research | Year: 2014
The North China Approach to assess karst groundwater vulnerability was proposed based on European Model, modifying C and P factors to adapt the specificity of karst regions specificity in North China. It was firstly applied to the Fangshan karst regions in Beijing and the vulnerability maps indicate high vulnerability nearby karst caves and the areas lacking overlying soil. © (2014) Trans Tech Publications, Switzerland.
Zhai Y.,Beijing Normal University |
Guo Y.,Beijing Normal University |
Zhou J.,Beijing Institute of Geological Engineering |
Guo N.,Beijing Normal University |
And 2 more authors.
Hydrological Processes | Year: 2014
Rapid population growth and increased economic activity impose an urgent challenge on the sustainability of water resources in Beijing. Understanding the spatial and temporal variability of precipitation is of the upmost importance in order to sustain the region's water resources. Two time series, one long term (1724-2010) from a single meteorological station and a shorter time series (1980-2010) from 20 different meteorological stations within the Beijing area, were analysed using Linear Regression, Moving Average, Mann-Kendall, Rescaled Range and Spatial Interpolation methods. Results from both the long- and short-term meteorological data show a mean annual precipitation rate of 600mm and 540mm respectively. Annual precipitation rates have decreased during the 21st century by an estimated 100mm or 16% in comparison to the 1990s. The 1980-2010 data show an increase in precipitation during the early 1990s followed by a sharp decrease during the subsequent years. The change of annual precipitation with time is more random and diverse in comparison to space. The main local impact factors (terrain, urbanization and elevation) and how they work on the local precipitation especially the spatial diversity are identified qualitatively. Generally speaking, (1) the annual precipitation of the plain area is more than that of the mountainous area (terrain effect), (2) the annual precipitation of the urban area in the plain area is obviously more than that of the surrounding suburb area (urbanization effect) and (3) the annual precipitation of the lower location is approximately more than that of the higher location (elevation effect). © 2013 John Wiley & Sons, Ltd.
Zhai Y.,Beijing Normal University |
Zhai Y.,Engineering Research Center for Groundwater Pollution Control and Remediation |
Wang J.,Beijing Normal University |
Wang J.,Engineering Research Center for Groundwater Pollution Control and Remediation |
And 5 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013
The Yongding River Alluvial Fan is a northwestern part of the North China Plain, at which Beijing is located. Since 1950 and especially 1970, excessive groundwater exploitation has resulted in a significant drop of groundwater table, and it's believed that groundwater will be intensively used continuously in the future. It's essential to reveal the renewability and the evolution of the groundwater for reasonable management, which was achieved based on the analyses of the major ions and environmental tracers in groundwater. According to the dating results of 3H, CFCs, and 14C, the age of the shallow and deep groundwater was from <5 to 60 a and from <4,000 to >12,000 a, respectively. The recharge rate determined by the groundwater age generally had a decreasing trend from the NW (0.40-1.44 m/a) to the SE (0.07-0.48 m/a). Na and HCO3 accumulated from the NW to the SE and the latter was the dominant anion. Chemical modification occurred progressively along the flow paths. The water type of the shallow and deep groundwater changed from Ca-Mg-HCO3 to Na-HCO3 and from Ca-Mg-HCO3 to Ca-Na-Mg-HCO3 and Na-Ca-Mg-HCO3 from the NW to the SE, respectively. The shallow groundwater was vulnerable and susceptible to contamination scattered throughout the region, which would probably further extend to the deep groundwater because of the vertical groundwater flow especially through the preferential pathways due to their increasing hydraulic connections. © 2013 Akadémiai Kiadó, Budapest, Hungary.
Chao Y.,China University of Geosciences |
Li Y.,Beijing Institute of Geological Engineering |
Qing M.,Gold Geological Institute of CAPF
2011 International Conference on Multimedia Technology, ICMT 2011 | Year: 2011
The key point of early warning and prevention of geological disasters focuses on the regional geological disasters in long-term real-time monitoring. For the always happened, most damaging geological disaster-landslides, unattended monitoring stations with embedded, wireless sensor networks were designed to real-time acquire regional geological environment data related to landslide in monitoring area, then stored the data in the data warehouse that based on temporal GIS technology. On the system platform designed by ArcGIS Server, using geological disaster warning model systems that built on space analysis technology to process and analyses the GIS data that contained the time properties comprehensively, to predict the probability of landslide occurrence in the future point, and use WebGIS to publish, form a complete warning system platform. © 2011 IEEE.
Chen Q.,Tsinghua University |
Chen Q.,Beijing Institute of Geological Engineering |
Li Z.,Tsinghua University |
Zhang Z.,Tsinghua University
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010
Due to blasting and other disturbances during the process of excavation of underground caverns, loosening zone around the caverns can be found, and it would become larger with time at high geostress. Several loosening zone models and its simulation method proposed are introduced by other scholars. Based on the models, a new model is proposed that is related to frequency and displacement, which can be used to large and complex underground caverns. Due to different forms and distribution loosing zones around the underground caverns, its application to displacement back analysis for Jinping I hydropower underground caverns is introduced. Therefore, it should consider loosening zone in back analysis, and the proposed loosening model is suitable for underground engineering.
Li Y.,Beijing Institute of Geological Engineering |
Zhao C.,University of Science and Technology of China |
Chao Y.,China University of Geosciences
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011
The writers designed the drawings management system which based on ObjectARX.Net technology, and on using PDM management process analyzed users' needs of enterprise drawing management. The designed system contained drawings database, server and client programs. And for different clients it realized functions like, design drawings, review, storage, release, query, browsing. © 2011 IEEE.
Liu Y.,Beijing Institute of Hydrogeology and Engineering Geology |
Liu J.,Taiyuan University of Technology |
Li S.,Beijing Institute of Geological Engineering |
Dong P.,Beijing Institute of Hydrogeology and Engineering Geology |
Sun Y.,Beijing Institute of Hydrogeology and Engineering Geology
Advanced Engineering and Technology II - Proceedings of the 2nd Annual Congress on Advanced Engineering and Technology, CAET 2015 | Year: 2015
The numerical simulation of groundwater was a necessary tool for the groundwater movement research and water resources evaluation. Through three-dimensional numerical simulation modeling of groundwater flow and the solute transport modeling in the upper of Chaobai river alluvial fan in Beijing, this research predict and evaluate that the construction of recycled water plant will bring about direct effect and indirect harm to groundwater environment Taking COD as the main pollution index, the model predicted that the concentration of pollutant COD in groundwater is far less than drinking water standards, after recycled water plant used for 30 years later. Therefore, the use of recycled water basically has no impact on the surrounding groundwater environment. © 2015 Taylor & Francis Group, London.
Zhou X.,Chinese Ministry of Water Resources |
Song C.,Water Resources University |
Li T.,Beijing Institute of Geological Engineering
Hydrological Sciences Journal | Year: 2016
The inland extending length of the freshwater–saltwater interface toe is useful in studies of seawater intrusion in coastal areas. The submarine fresh groundwater discharge in coastal zones is affected not only by hydraulic conductivity and hydraulic gradient of the aquifer, but also by the position of the interface. Two observation wells at different distances from the coast are required to calculate the fresh groundwater flow rate in coastal unconfined aquifers. By considering that the submarine groundwater discharge is equal to the groundwater flow rate, the length of the interface toe extending inland can be estimated when the groundwater flow is at a steady-flow state. Aquifers with horizontal and sloping confined beds and without/with unique surface vertical infiltration are considered. Examples used to illustrate the application of these methods indicate that the inland extending lengths of the interface toe in aquifers with vertical surface infiltration are much shorter than those in aquifers without vertical surface infiltration, and the length of the interface in aquifers with a horizontal confining lower bed are smaller than those in aquifers with a confining lower bed sloping towards the sea. The extent of the interface on the northwestern coast near the city of Beihai in southern Guangxi, China, on 18 January 2013 was estimated as 471–478 m.EDITOR M.C. Acreman ASSOCIATE EDITOR not assigned © 2016 IAHS
Wang H.D.,Beijing Institute of Petrochemical Technology |
Sun Y.H.,Beijing Institute of Petrochemical Technology |
Huang X.,Beijing Institute of Geological Engineering |
Lu Q.X.,Beijing University of Technology |
He J.,Beijing University of Technology
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016
Saline soil disaster is one of the environmental geological problems in the construction of Yanqing new town. In this paper, the saline soil distribution area, chemical composition, and causes of Saline soil in new town area were described, the types of saline soil were divided, and the salt expansion and corrosion were evaluated, which provides the basis for the planning and construction of Yanqing new town and the prevention of disasters. © 2016 Taylor & Francis Group, London.
PubMed | Beijing Institute of Geological Engineering and University of Science and Technology Beijing
Type: | Journal: Environmental science and pollution research international | Year: 2016
Miyun Reservoir is one of the most important drinking water sources for Beijing. Thirteen atmospheric PM sampling sites were established around this reservoir to analyze the mineral composition, morphological characteristics, element concentration, and sources of atmospheric PM pollution, using transmission electron microscope, X-ray diffraction, and inductively coupled plasma mass spectrometry analyses. The average monthly dry deposition flux of aerosols was 15.18g/m