China Institute for Geo environmental Monitoring

Beijing, China

China Institute for Geo environmental Monitoring

Beijing, China
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Huang B.,China Three Gorges University | Yin Y.,China Institute for Geo Environmental Monitoring
Natural Hazards and Earth System Sciences | Year: 2017

A rocky granular flow is commonly formed after the failure of rocky bank slopes. An impulse wave disaster may also be initiated if the rocky granular flow rushes into a river with a high velocity. Currently, the granular mass-water body coupling study is an important trend in the field of landslide-induced impulse waves. In this paper, a full coupling numerical model for landslide-induced impulse waves is developed based on a non-coherent granular flow equation, i.e., the Mih equation. In this model, the Mih equation for continuous non-coherent granular flow controls movements of sliding mass, the two-phase flow equation regulates the interaction between sliding mass and water, and the renormalization group (RNG) turbulence model governs the movement of the water body. The proposed model is validated and applied for the 2014 Tangjiaxi landslide of the Zhexi Reservoir located in Hunan Province, China, to analyze the characteristics of both landslide motion and its following impulse waves. On 16 July 2014, a rocky debris flow was formed after the failure of the Tangjiaxi landslide, damming the Tangjiaxi stream and causing an impulse wave disaster with three dead and nine missing bodies. Based on the full coupling numerical analysis, the granular flow impacts the water with a maximum velocity of about 22.5ms-1. Moreover, the propagation velocity of the generated waves reaches up to 12ms-1. The maximum calculated run-up of 21.8m is close enough to the real value of 22.7m. The predicted landslide final deposit and wave run-up heights are in a good agreement with the field survey data. These facts verify the ability of the proposed model for simulating the real impulse wave generated by rocky granular flow events. © 2017 Author(s).


Zhou P.,CAS Institute of Geology and Geophysics | Qiao X.,University of Chinese Academy of Sciences | Li X.,China Institute for Geo Environmental Monitoring
Journal of Hydroinformatics | Year: 2017

Coastal groundwater level is affected both by tide and pumping. This paper presents a numerical model to study the effects of pumping on tide-induced groundwater level fluctuation and on accuracy of hydraulic parameters estimated via tidal method. Firstly, for the effects of pumping on the groundwater level fluctuation under the combined influence of pumping and tide, groundwater level has a drawdown but eventually reaches a quasi-steady-state again. Steady pumping can attenuate the amplitude but cannot affect the phase of the quasi-steady fluctuation. However, seaward steady pumping plays a relatively obvious role in enhancing drawdown compared with landward pumping, a partial penetration well leads to greater drawdown than a full penetration well, and transient pumping induces large amplitude which does not reflect large transmissivity. Secondly, for the effects of pumping on the accuracy of the parameter estimated via the tidal method, transient pumping or large steady pumping, especially in a full penetration well, significantly affects accuracy of the estimated parameters. However, when the distance between the pumping well and tide observation well exceeds 200% of the distance between observation well and shoreline, pumping effect on estimated parameters can be neglected. The conclusions could provide guidance for reasonable application of the tidal method. © IWA Publishing 2017.


Meng W.,Chinese Academy of Geological Sciences | Meng W.,Key Laboratory of Neotectonic Movement and Geohazard | Guo C.-B.,Chinese Academy of Geological Sciences | Guo C.-B.,Key Laboratory of Neotectonic Movement and Geohazard | And 5 more authors.
Acta Geophysica Sinica | Year: 2017

Tectonic activities are frequent in the Lhasa terrane because of the sustained collision between the India and Eurasia plates. It is very important to figure out the state of geo-stress when dealing with rocks in underground excavations designing and construction, as well as in geodynamics study and crustal stability evaluation. Hydraulic fracturing measurements were carried out to characterize the shallow crustal stress state in the places of Nyching County (LZ), Lang County (LX), and Naidong County (ND), Lhasa terrane, during the years of 2014 and 2015. The stress regime in LX and ND boreholes generally favor reverse faulting characterized by SH>Sh>Sv within the range of the measurement depths, where SH, Sh, and Sv are maximum horizontal, minimum horizontal, and vertical principal stresses, respectively. And the stress magnitudes are much higher than those of LZ, which might be influenced by its surrounding structures. Horizontal stresses are revealed to be dominant in the Lhasa terrane, not only by the principal stress magnitudes but also by the stress characteristic ratio values. Moreover, the stress state in the Lhasa terrain is in critical state of failure equilibrium, and pre-existing faults are likely to be active when the stress is accumulated sufficiently to destroy the frictional equilibrium. Fracture impression results reveal that the maximum horizontal principal stresses in the LX borehole are predominantly S-N, and the LZ and ND boreholes are dominated by NNE-directed stress. The stress state in the Lhasa terrain is controlled by the continued extrusion and collision environment of the India and Eurasia plates in general, which constitutes the regional geo-stress background. The stress state differences among test boreholes also reflect the difference of local tectonic effect. © 2017, Science Press. All right reserved.


PubMed | Water Resources University, China Institute for Geo environmental Monitoring and China Institute of Metrology
Type: | Journal: Chemosphere | Year: 2016

High arsenic (As) groundwater usually has high concentrations of natural organic matter (NOM). Effects of NOM on arsenic adsorption were investigated to evaluate the efficiency of modified granular natural siderite (MGNS) as an adsorbent for groundwater arsenic remediation. Humic and fulvic acids (HA/FA) were selected as model NOM compounds. In batch tests, HA or FA was either first adsorbed onto the MGNS, or applied together with dissolved arsenic to investigate effects of both adsorbed and dissolved NOM on arsenic removal. The kinetic data showed no significant effects of both adsorbed and dissolved HA/FA on As(III) adsorption. However, As(V) removal was inhibited, whereby the adsorbed NOM compounds had greater inhibitory effect. The inhibitory effect on As(V) removal increased with increasing NOM concentrations. FA exhibited higher inhibitory effect than HA at the same concentration. Steric Exclusion Chromatography-HPLC (SEC-HPLC), and High-Performance Size Exclusion Chromatography-UV-Inductively Coupled Plasma Mass Spectrometry (HPSEC-UV-ICP-MS) revealed that As(V) removal was mostly achieved by the oxyanion adsorption and adversely affected by dissolved FA via competitive adsorption for surface sites. In addition to oxyanion adsorption, removal of As(V) was related to scavenging of ternary HA-As-Fe complexes, which led to the less inhibitory effect of dissolved HA on As(V) removal than dissolved FA via competitive adsorption.


Gao C.-R.,China Institute for Geo Environmental Monitoring | Liu W.-B.,China University of Geosciences | Feng C.-E.,China Institute for Geo Environmental Monitoring | Liu B.,China Institute for Geo Environmental Monitoring | Song J.-X.,China Institute for Geo Environmental Monitoring
Acta Geoscientica Sinica | Year: 2014

Distribution characteristics of saline groundwater and high-arsenic groundwater in the Hetao Plain of Inner Mongolia was discussed in detail based on such means as field investigation, data analysis and experiment test. The results show that large amounts of saline groundwater and high-arsenic groundwater are distributed in the Hetao Plain. In shallow groundwater at the depth of 10~40 m in the study area covering 12510.83 km2, the fresh groundwater, lower-saline groundwater and saline groundwater possess 9025.51 km2, 1145.75 km2 and 2339.57 km2 respectively, accounting respectively for 9.16%, 72.14% and 18.70% of the total study area, whereas high-arsenic groundwater (As≥0.05 mg/L) makes up 233.85 km2, 2965.74 km2 and 997.16 km2 in these three sorts of groundwater, accounting respectively for 20.41%, 32.86% and 42.62%. Saline groundwater extends as two zones respectively in the south and the north, and saline groundwater in the north is from the west to the east with the width of 5~10 km. The groundwater quality in the east is characterized by freshness in the upper part and salinization in the lower part. Saline groundwater in the south is in zoning distribution from the west to the east in the north of the water diversion main canal, which is relatively narrow in the west and wide in the east. The distribution of high-arsenic groundwater has obvious zoning characteristics. High-arsenic groundwater is distributed widely in irregular sheet form with insignificant difference of arsenic content in the east, and is distributed in NE-trending banding along low-lying terrain of mountain front region with high arsenic content in the west. The result shows that there is no positive correlation between salt concentration and arsenic concentration in groundwater. However, there does exist certain relation between the distribution of high-arsenic groundwater and the saline area in the northwest area, which is considered to be controlled by structure. And there does not exist such a relation in the east area.


Liu Q.,China University of Geosciences | Liu Q.,Water Resources University | Liu Q.,China Institute for Geo Environmental Monitoring | Guo H.,China University of Geosciences | And 4 more authors.
International Biodeterioration and Biodegradation | Year: 2013

This study investigated the potential of the Fe(II)-oxidizing bacteria in removing arsenic in aqueous environment. The bacteria were isolated from the batch of tap water and rusty iron wires, and were acclimated to culture media amended with arsenic concentrations, gradually increasing from 100 μg L-1 to 100 mg L-1. Acclimated bacteria with enhanced arsenic tolerance were used to remove arsenic from the aqueous solution. These bacteria belonged to Pseudomonas species according to 16S rRNA gene sequences. Extracellular enzymes produced by these bacteria played important roles in microbial Fe(II) oxidization and Fe oxide precipitation. Moreover, these bacteria survived and propagated in high arsenic condition (100 mg L-1 As). However, after As(III/V) acclimation, morphological characteristics of the bacteria showed some changes, e.g., shrinking of long bacillus. XRD (X-ray diffraction) patterns indicated that Fe oxide precipitations by Fe(II)-oxidizing bacteria in Fe-rich culture medium were poorly-crystallized ferrihydrites. Adsorption on the biogenic ferrihydrites greatly contributed to high arsenic removal efficiency of Fe(II)-oxidizing bacteria. © 2012 Elsevier Ltd.


Li Z.-D.,Hubei University | Luo Y.,China Institute for Geo Environmental Monitoring
Geological Bulletin of China | Year: 2011

With the concept of sustainable development as a guide, based on ecological concepts, this paper, from China's national conditions, analyzes the importance and necessity of integrated natural resources evaluation. Put forward the concept framework of integrated natural resources assessment from the perspective of ecological civilization, and discuss the construction of integrated natural resource evaluation system on the assessment of natural resources system adaptability, natural resource evaluation and natural resource accounting system, environmental impact assessment and associated evaluation of natural eresources development and utilization, and other aspects.


Gao C.-R.,China Institute for Geo environmental Monitoring | Feng C.-E.,China Institute for Geo environmental Monitoring | Liu W.-B.,China Institute for Geo environmental Monitoring | Akai J.,Niigata University | And 2 more authors.
Acta Geoscientica Sinica | Year: 2014

In order to better monitor and predict groundwater arsenic contamination and reveal the law and mechanism of groundwater arsenic contamination caused by natural factors, the authors carried out investigation and research on groundwater arsenic contamination in Hetao Plain of Inner Mongolia for years. Based on fully understanding and grasping of arsenic chemical and geochemical properties as well as the situation and distribution characteristics of groundwater arsenic contamination all over the world, the authors summarized the distribution of arsenic in natural environment and the mechanism of groundwater arsenic contamination. This study expounded the formation mechanism of four types of groundwater arsenic contamination and presented the patterns of arsenic cycle and groundwater arsenic contamination on the earth's surface. With the basic mastering of the geological environment background of a certain region, these patterns could offer a preliminary prediction of the possible locations of arsenic contamination. This study indicates that arsenic contamination in groundwater is an environmental hydrogeochemical phenomenon, which happens in the arsenic cycle on the earth's surface. The distribution of contaminated areas is related to specific geological and geographical backgrounds and environmental conditions. This study suggests that, in the reductive desorption contamination type, such factors as the closed environment, sulfur and organic carbon constitute the main control factors for the dissolution of arsenic in strata. In the future, it is necessary to reinforce the investigation and monitoring of arsenic contamination in groundwater in closed alluvium-acustrine plains, river-lake deltas, and river-sea deltas. ©, 2014, Science Press. All right reserved.


Zhou Y.,UNESCO-IHE Institute for Water Education | Li W.,China Institute for Geo environmental Monitoring
Geoscience Frontiers | Year: 2011

Significant advances in regional groundwater flow modeling have been driven by the demand to predict regional impacts of human inferences on groundwater systems and associated environment. The wide availability of powerful computers, user friendly modeling systems and GIS stimulates an exponential growth of regional groundwater modeling. Large scale transient groundwater models have been built to analyze regional flow systems, to simulate water budget components changes, and to optimize groundwater development scenarios. This paper reviews the historical development of regional groundwater modeling. Examples of Death Valley and Great Artesian Basin transient groundwater models are introduced to show the application of large scale regional groundwater flow models. Specific methodologies for regional groundwater flow modeling are descried and special issues in regional groundwater flow modeling are discussed. © 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.


Zhou Y.,UNESCO-IHE Institute for Water Education | Dong D.,Beijing Institute of Geo environmental Monitoring | Liu J.,Beijing Institute of Geo environmental Monitoring | Li W.,China Institute for Geo environmental Monitoring
Geoscience Frontiers | Year: 2013

Monitoring of regional groundwater levels provides important information for quantifying groundwater depletion and assessing impacts on the environment. Historically, groundwater level monitoring wells in Beijing Plain, China, were installed for assessing groundwater resources and for monitoring the cone of depression. Monitoring wells are clustered around well fields and urban areas. There is urgent need to upgrade the existing monitoring wells to a regional groundwater level monitoring network to acquire information for integrated water resources management. A new method was proposed for designing a regional groundwater level monitoring network. The method is based on groundwater regime zone mapping. Groundwater regime zone map delineates distinct areas of possible different groundwater level variations and is useful for locating groundwater monitoring wells. This method was applied to Beijing Plain to upgrade a regional groundwater level monitoring network. © 2012, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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