Center for Hydrogeology and Environmental Geology Survey
Center for Hydrogeology and Environmental Geology Survey
Duan G.,Wuhan University |
Niu R.,Wuhan University |
Peng L.,China Institute of Geo Environment Monitoring |
Fu J.,Center for Hydrogeology and Environmental Geology Survey
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | Year: 2017
Induced by many factors such as rainfall, the landslide displacement prediction is a complex nonlinear dynamic system. By using Baijiabao landslide monitoring data in three-gorge reservoir, we get the characteristics of landslide evolution to extract the related influence factors of landslide deformation. It was found after analysis that the most leading accumulation was rainfall; Based on the mathematical of Arima model, introducing monthly cumulative rainfall to evaluate seasonal trend as model parameter optimization, using as many as 72 monthly relative displacement data to fitting and prediction, finally the average absolute error and the correlation coefficient between predicted results and the measured values are 2.873 and 0.983. Results show that the optimized parameters of the model improve the accuracy compared with the traditional experience method. Under the comprehensive effects of rainfall and other external inducing factors, the accurate forecasting of landslide displacement is really a complicated dynamical system problem. Firstly, we use monitoring data of Baijiabao landslide in the Three Gorges Reservoir Area as an example, form a basically analysis of real-time characteristics of landslide evolution in each stage of its development, then extract the most relevant factors which most affect the deformation of Baijiabao landslide, this process shows that the Baijiabao landslide belongs to a type of rainfall-induced colluvial slope; Secondly, we use the autoregressive integrated moving average model as a method for fitting and prediction for monitoring data, and the seasonal trend parameters of the model are also evaluated by the seasonal factor of monthly cumulative rainfall data at the same time. Finally, we build a study on fitting and prediction of landslide relative displacement data in 72 months, the average absolute error of the model results and the measured values are 2.873, and the modal correlation coefficient reaches 0.983 which is very accurate. This research shows that: when compared with the traditional experience method, the optimal parameter model is more in line with the general law of landslide deformation in each stage of actual development. © 2017, Research and Development Office of Wuhan University. All right reserved.
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.
Gu D.M.,Chongqing University |
Huang D.,Chongqing University |
Yang W.D.,Chongqing University |
Zhu J.L.,Center for Hydrogeology and Environmental Geology Survey |
Fu G.Y.,RMIT University
Landslides | Year: 2017
More than 5000 landslides or potential landslides have been induced in the Three Gorges Reservoir (TGR) region since the impoundment in 2003, which have caused great damage and remain a huge threat to the dam and people living in the reservoir area. Understanding the deformation characteristics and failure mechanism of the landslides can be helpful in stability evaluation and landslide prediction. The primary aim of this study is to research the characteristics of the landslide motion and its relationships with environmental triggers, taking the Quchi landslide, a large, slow-moving, reactivated landslide in the TGR region, as an example. The instability clearly showed visible signs of movements since 2002, and after that, the slope has been experiencing persistent deformation. By combining 4 years of meteorological, hydrological data with displacement measurements from open fractures, deep boreholes, and surface points, as well as in situ observations, this paper reports the geological and geotechnical investigations performed to define the movement. The deformation is believed to be governed by reservoir water levels, while the precipitation has a minor effect. Seasonally, the slope movement has a very distinctive pattern with large deformation starting abruptly right after reservoir drawdown in June and lasting into late summer (September). Then there is a rapid transition to constant deformation (almost no displacement) as the reservoir level rises. The slope displacements appear to gradually increase every year, which suggests very high possibility of the large and overall failure of the slide. Both monitoring results and geomorphological observations have highlighted that the two active slide masses Q1 and Q2 would probably collapse in different kinematic evolution modes, i.e., the multistage failure and whole sliding motion. © 2017 Springer-Verlag Berlin Heidelberg
Wang Y.S.,Center for Hydrogeology and Environmental Geology Survey |
Chen X.X.,Center for Hydrogeology and Environmental Geology Survey |
Zhang M.N.,Center for Hydrogeology and Environmental Geology Survey |
Li H.X.,Center for Hydrogeology and Environmental Geology Survey
IOP Conference Series: Earth and Environmental Science | Year: 2017
It is important to quantify the hydraulic relationship between surface water and groundwater for developing water resources sustainably. In this study, thirty-six samples were taken and the interaction between river water and groundwater was analyzed on the basis of hydrogeochemical characteristics. Environment tracers such as EC and Cl- were used to calculate groundwater inflows along river flow path by the mass balance method, then it provided a detailed longitudinal profile of groundwater discharge rates. The results show that groundwater discharged to Yellow River mainly in dry season and varied spatially along river length with larger rates in two areas. The groundwater inflows calculated by Cl- and EC mass balances differentiated with each other, which indicated potential uncertainties. Thus, it was necessary to use multiple tracers to quantify groundwater discharge in order to improve accuracy. The representation of the groundwater end-member for environment tracers, the completeness of water balance items and sample resolution were shown to be of vital importance for calculating groundwater inflows using environmental trace method. © Published under licence by IOP Publishing Ltd.
Zhenlin F.,Center for Hydrogeology and Environmental Geology Survey |
Zheng B.,Center for Hydrogeology and Environmental Geology Survey |
Bin W.,Center for Hydrogeology and Environmental Geology Survey |
Fangzi C.,Center for Hydrogeology and Environmental Geology Survey
2016 2nd IEEE International Conference on Computer and Communications, ICCC 2016 - Proceedings | Year: 2017
A Field Work Safety Monitoring System for Western China was build up to fill the gaps in real-time and dynamic monitoring for geological survey field work in hard and dangerous regions. The system was based on Beidou satellite network, private network of China Geological Survey and mobile communication network. It combined the Geographic Information System technology, safety production management and dynamic monitoring for vehicle and staff. Applications of the system indicated that it could improve the security of geological survey and guarantee the safety of lives and property in hard and dangerous regions. The occupational hazard and accident risk was reduced significantly to ensure successful implementation of the geological survey work. © 2016 IEEE.
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.
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.
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.