Wen D.,China Geological Survey |
Zhang F.,Center for Hydrogeology and Environmental Geology Survey |
Zhang E.,China Geological Survey |
Zhang E.,Peking University |
And 5 more authors.
Journal of Geochemical Exploration | Year: 2013
Arsenicosis and fluorosis, two endemic diseases known to result from exposure to their elevated concentrations in groundwater of north China used by many rural households for drinking, have been major public health concerns for several decades. Over the last decade, a large number of investigations have been carried out to delineate the spatial distribution and to characterize the chemical compositions of high As and F groundwaters with a focus on several inland basins in north China. Findings from these studies, including improved understanding of the hydrogeological and geochemical factors resulting in their enrichments, have been applied to guide development of clean and safe groundwater in these endemic disease areas. Survey efforts have led to the recognition of iodine in groundwater as an emerging public health concern. This paper reviews the new understandings gained through these studies, including those published in this special issue, and points out the direction for future research that will shed light on safe guarding a long-term supply of low As and F groundwater in these water scarce semi-arid and arid inland basins of north China. © 2013 The Authors.
Xing A.,Shanghai JiaoTong University |
Xu Q.,Chengdu University of Technology |
Zhu Y.,Guizhou Institute of Geo Environment Monitoring |
Zhu J.,Center for Hydrogeology and Environmental Geology Survey |
Jiang Y.,Kyoto University
Landslides | Year: 2016
At about 8:30 p.m. on 27 August 2014, a catastrophic rock avalanche suddenly occurred in Fuquan, Yunnan, southwestern China. This landslide and related impulse water waves destroyed two villages and killed 23 persons. The impulse waves occurred after initiation of the landslide, caused by the main part of the slide mass rapidly plunging into a water-filled quarry below the source area. The wave, comprising muddy water and rock debris, impacted the opposite slope of the quarry on the western side of the runout path and washed away three homes in Xinwan village. Part of the displaced material traveled a horizontal distance of about 40 m from its source and destroyed the village of Xiaoba. To provide information for potential landslide hazard zonation in this area, a combined landslide–wave simulation was undertaken. A dynamic landslide analysis (DAN-W) model is used to simulate the landslide propagation before entering the quarry, while Fluent (Ansys Inc., USA) is used to simulate the impulse wave generation and propagation. Output data from the DAN-W simulation are used as input parameters for wave modeling, and there is good agreement between the observed and simulated results of the landslide propagation. Notably, the locations affected by recordable waves according to the simulation correspond to those recorded by field investigation. © 2016 Springer-Verlag Berlin Heidelberg
Zhang L.,CAS Changchun Northeast Institute of Geography and Agroecology |
Zhang L.,Jilin University |
Lu W.,Jilin University |
An Y.,Jilin University |
And 2 more authors.
Fresenius Environmental Bulletin | Year: 2013
The purpose of this study is to identify the critical areas of Dongliao River watershed and evaluate the reduction effect of non-point source pollution by applying the best management practices (BMPs) using a physical process-based watershed scale model-SWAT (Soil and Water Assessment Tool). At first, the SWAT model's performance was tested for the watershed with observed data. Data from 2005 to 2007 was used for calibration while data from 2008 to 2009 was used for validation. The calibration and validation results indicated that the SWAT model was able to simulate well the stream-flow and nonpoint source pollutant loads, with coefficient of determination and Nash-Sutcliffe efficiency both about 0.7 for calibration and validation, respectively. Then, the model was used to identify the critical sub-basins and to assess the impacts of seven BMP scenarios including contour farming, conversation tillage, parallel terraces, filter strips, grassed waterways, grade stabilization structures, and residue management on river loads at the outlet. The results showed that among the seven BMPs simulated, filter strip had the best effects on the reduction of sediment. The reduction rate could reach 63.24%. The conversation tillage, parallel terrace, contour farming, filter strip and residue management all showed significant TN and TP load reduction, and the reduction rate could reach about 30% both for TN and TP loading. The grassed waterway had minimal benefit on TP and TN loads but had significant effect on sediment reduction. So, BMPs have significant effects on the reduction of non-point source pollutant loads and the improvement of water quality, and the results will provide a scientific basis for the protection and improvement of water quality in Dongliao River. © by PSP.
Yu X.-P.,Jilin University |
Song M.,Center for Hydrogeology and Environmental Geology Survey |
Zhang W.-J.,Jilin University
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2015
Based on the hydrogeological conditions and the organic pollution characteristics in this study area, DRSIC model has been established to classify the vulnerability of groundwater. According to this vulnerability results and hazard load conditions, organic pollution risk assessment model have been built and verified by the groundwater organic contamination situation. The weighting of all models was calculated by AHP (analytic hierarchy process). The assessment results indicated that the levels of organic pollution risk along Xihe River and Yangshi to Yuhong Area was higher than the other areas. The assessment results are well reflected organic pollution status in this study area. ©, 2015, Chinese Society for Environmental Sciences. All right reserved.
Xie X.-L.,Center for Hydrogeology and Environmental Geology Survey |
Liu X.-Q.,Beijing Institute of Technology |
Zha E.-L.,Center for Hydrogeology and Environmental Geology Survey
Wutan Huatan Jisuan Jishu | Year: 2015
Depiction of volcanic edifice is very important because it controls the distribution of volcanic lithofacies and is u-sually fine reservoir development region. However, it is very hard to depict volcanic edifice directly using seismic data due to obvious heterogeneity of volcanic rock and low SNR of seismic data. Ensemble empirical mode decomposition (EEMD) and seismic wavelet decomposition and reconstruction are hotspots in current study, these two methods can have good results in getting effective signal. This paper attempts to decompose seismic data of volcanic edifice by these two methods. These two methods have similar effects despite of different starting point, which provides basis for volcanic edifice depiction.
Wang X.,Center for Hydrogeology and Environmental Geology Survey |
Wang Y.,Baoding Geology Engineering Exploration Institute Hebei Province |
Yu K.,Shijiazhuang University of Economics
Geological Engineering and Mining Exploration in Central Asia - Proceeding Source: The XVIII Kerulien International Conference on Geology, KICG 2013 | Year: 2013
Rainfall-induced landslide, characterized by wide range of distribution, high frequency of occurrence and serious degree of hazard, is the most important object for landslide hazard research. On the basis of making certain of the concept and classification attribute of rainfall-induced landslide, this paper analyzes the inducing factors for rainfall-induced landslide in details, especially dynamic factor, and furthermore analogizes the action mechanism of landslide inducing factors to the formation mechanism of rainfall-induced landslide. In addition, based on sorting out and analyzing a great quantity of domestic & foreign document literatures, longitudinal discussion has been done as per the research status of rainfall-induced landslide forecast criteria and its data mining method. It believes that the rainfall-induced landslide forecast criteria can not only rely on precipitation but also be subject to the systematic research in combination with remote sensing, hydrologic & engineering geology, so as to obtain more accurate and reasonable forecast results.
Wang L.,Water Resources University |
Shen Z.,Water Resources University |
Hu L.,Center for Hydrogeology and Environmental Geology Survey |
Yu Q.,Water Resources University
Fluid Phase Equilibria | Year: 2014
Geological carbon storage (GCS) is recognized as an effective method for mitigating the greenhouse effect. Deep saline aquifers hold the highest potential capacity for CO2 storage. CO2 solubility in salty aqueous solutions under geological sequestration conditions plays a key role in GCS. However, most CO2 solubility studies focus mainly on single-salt solutions (NaCl and CaCl2), and extrapolation of these studies to aqueous solutions with mixed ions is unavailable. To fill the research gap, based on the collection of CO2 solubility data, a semi-empirical thermodynamic model is proposed in this paper to calculate CO2 solubility in aqueous solutions containing K+, Na+, Ca2+ and Mg2+ in the temperature and pressure ranges from 313K to 378K and from 50bar to 220bar. To describe the CO2-liquid phase equilibrium, the Peng-Robinson equation of state (PR EoS) and the Setschenov equation are applied. The former has been modified to improve its performance in the studied T-P range, and the latter shows excellent accuracy with only three optimized parameters. Before modeling was done, experimental studies were conducted. Brine sampling from five reservoirs potentially chosen for CO2 sequestration in the Erdos Basin was carried out using a monitoring well in the support of the Shenhua Group carbon capture and storage (CCS) site project. The chemical composition of the samples was determined, and experiments measuring CO2 solubility were carried out in synthetic brine with 64 valid data points reported. An analytical method with a simplified sampling technique was chosen. In the range studied, the average absolute deviation of CO2 solubility between the model and experimental results was 2.01%, and the maximum absolute deviation in this study was less than 4.79%. The proposed model and experimental data therefore possess broad adaptability to GCS with satisfactory accuracy. © 2014.
Xiuyuan Y.,Center for Hydrogeology and Environmental Geology Survey |
Youlong G.,Center for Hydrogeology and Environmental Geology Survey |
Hongde W.,Center for Hydrogeology and Environmental Geology Survey |
Junyi Z.,Center for Hydrogeology and Environmental Geology Survey
Proceedings - 2014 6th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2014 | Year: 2014
Today is information society. Information acquisition and sharing become absolutely necessary. By using the platform built up through computer science and communication technology, we make the monitoring instrument, which was monitored by terminal computers on communication network, collect and transfer data according to established procedures. Either, those monitoring facilities can be made collect and transfer data instantly under the control of the instruction. By doing these, we can acquire information under all conditions and no human labor. After acquiring the mass data, we can calculation and analysis it, and judging the risk of the object, then share them by Internet web. We called this whole course "monitoring & early warning". Geologic Hazards Real-time monitoring is used for monitor the major geological Hazards which too dangerous to people can't close to it or too huge influence to can't complete control. The geologic hazard monitoring and early warning demonstration station is a template for real-time monitoring. It can be copy to other geologic hazards' monitoring and early warning. © 2014 IEEE.
Shi Y.,Center for hydrogeology and environmental geology survey |
Pang L.L.,Center for hydrogeology and environmental geology survey
Applied Mechanics and Materials | Year: 2014
In recent years, the exploitation and utilization of groundwater resources in the development of society plays a very important role. From the view of groundwater monitoring system, there are still a lot of problems, such as obsolete monitoring equipment, imperfect monitoring system. To solve these problems, by conducting studies of groundwater dynamic data acquisition and transfer of technology, research and development suited to China's national conditions groundwater monitoring series of instruments. Development of multi-level and multi-source remote management software base on network, build a set of groundwater dynamic data acquisition, storage, transmission, management, and remote control of the information service platform. It has been applied in a number of major projects for the construction and operation of the groundwater monitoring network in China to provide reliable monitoring equipment and management service software. © (2014) Trans Tech Publications, Switzerland.
Zhu J.L.,Center for Hydrogeology and Environmental Geology Survey |
Wang X.,Center for Hydrogeology and Environmental Geology Survey |
Cao X.D.,Center for Hydrogeology and Environmental Geology Survey
Global View of Engineering Geology and the Environment - Proceedings of the International Symposium and 9th Asian Regional Conference of IAEG | Year: 2013
Debris flow is a significant hazard to people living in mountain areas. A debris flow occurred in Lufanggou induced by a storm rainfall on July 13, 2010. 45 lives were killed, 43 lives were injured, and the direct property damage exceeded 1.8 billion RMB. On the basis of investigation of the geological conditions, we emphatically studied its formation mechanisms and its characteristics of motion. Abundant loose materials, great gradient (reaching up to 270‰), catchment area being 60 km2 and narrow diversion dike were the basic factors and conditions of debris flow occurrence. The rainfall directly triggered the debris flow. The cumulative amount of heavy rainfall reached up to 130.7 mm from July 5 to July 12, between the hours of 3:00 to 4:20 A.M. on July 13, the rainfall amount had already risen to 35 mm, and then we calculated some important characters, such as, high velocity and impulse height by corresponding formula. © 2013 Taylor & Francis Group, London.