scholarly journals Spatial variation of three-dimensional deformation: a case study in the north-eastern Beijing plain, China

2020 ◽  
Vol 382 ◽  
pp. 391-396
Author(s):  
Jiahui Zhou ◽  
Lin Zhu ◽  
Huili Gong ◽  
Huijun Li ◽  
Liping Zheng ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Land Subsidence ◽  
Regional Scale ◽  
Alluvial Fan ◽  
Impact Factors ◽  
Dominant Factor ◽  
Beijing Plain ◽  
Groundwater Supply ◽  
The Impact ◽  
East West

Abstract. Land subsidence is a serious geo-hazard in Beijing Plain, which has threatened the safety of the operation of the metropolis. This study focuses on the land subsidence in the Chaobai River alluvial fan, where is the main groundwater supply region. The vertical and the East-West deformation from June 2015 to December 2017 was derived based on the SAR imaging geometry deduction. Then, the spatial variation characteristics of the deformation were analysed and the relations with the impact factors were carried out. Results show that the nugget effect (i.e., random to total spatial variance ratio) values of the vertical and the East-West deformation at regional scale were 13 % and 49 %, respectively. This indicates that the distribution of the vertical deformation is dominated by regional influencing factors, while both regional and local-scale impact factors are important for the distribution of the East–West deformation. In the southern part of the study area, the extraction of groundwater is the dominant factor affecting the spatial distribution of the vertical displacement, while the dominant factor of East-West deformation is not obvious. This study can enrich the understanding of land subsidence distribution and will help us better understand the causes of land subsidence.

scholarly journals Analysis of Spatiotemporal Variation of Land Subsidence in Beijing Plain, China

2018 ◽  
Author(s):  
Lin Guo ◽  
Huili Gong ◽  
Feng Zhu ◽  
Lin Zhu ◽  
Chaofan Zhou ◽  
...  
Keyword(s):  
Land Subsidence ◽  
Water Source ◽  
Research Unit ◽  
Alluvial Fan ◽  
Test Method ◽  
The Sustainable Development ◽  
Beijing Plain ◽  
Geological Conditions ◽  
North Water ◽  
The Impact

Since the 1970s, land subsidence has been developing rapidly in the Beijing Plain, the systematic study of its evolution mechanism is of great significance to the sustainable development of the regional economy. First, based on ENVISAT ASAT and RADARSAT2 data, the land subsidence data in Beijing Plain were obtained using permanent interferometer technology. Second, based on the GIS platform and using fishing net tools, vector data of ground settlement with different resolutions were obtained. Through a series of tests, a scale of 960 metres was selected as the research unit, and the subsidence rate of the grid was obtained from 2004 to 2015. Finally, based on the Mann-Kendall mutation test method, a trend analysis of land subsidence changes in various grids was carried out. The results showed that single-year mutation mainly distributed in the middle and lower parts of the Yongding River alluvial fan and the Chaobai River alluvial fan, mainly occurring in 2015, 2005 and 2013, respectively. The upper and middle alluvial fan of the Chaobai River, the vicinity of the emergency water source and the edge velocity of the groundwater funnel have undergone several sudden changes. Combined with hydrogeology, basic geological conditions and the impact of the South-to-North Water transfer project, we analysed the causes of the mutations in the grid. The research results can provide a basis for the study and prevention of land subsidence in this area and help to further explore the trend characteristics of land subsidence in this area.

scholarly journals Analysis of the Spatiotemporal Variation in Land Subsidence on the Beijing Plain, China

2019 ◽  
Vol 11 (10) ◽  
pp. 1170 ◽  
Author(s):  
Lin Guo ◽  
Huili Gong ◽  
Feng Zhu ◽  
Lin Zhu ◽  
Zhenxin Zhang ◽  
...  
Keyword(s):  
Land Subsidence ◽  
Research Unit ◽  
Alluvial Fan ◽  
Envisat Asar ◽  
Beijing Plain ◽  
Persistent Scatterers ◽  
North Water ◽  
Variation Characteristics ◽  
The Impact ◽  
Mutation Information

Since the 1970s, land subsidence has been rapidly developing on the Beijing Plain, and the systematic study of the evolutionary mechanism of this subsidence is of great significance in the sustainable development of the regional economy. On the basis of Interferometric Synthetic Aperture Radar (InSAR) results, this study employed the Mann–Kendall method for the first time to determine the mutation information of land subsidence on the Beijing Plain from 2004 to 2015. By combining the hydrogeological conditions, “southern water” project, and other data, we attempted to analyse the reasons for land subsidence mutations. First, on the basis of ENVISAT ASAR and RADARSAT-2 data, the land subsidence of the Beijing Plain was determined while using small baseline interferometry (SBAS-InSAR) and Persistent Scatterers Interferometry (PSI). Second, on the basis of the Geographic Information System (GIS) platform, vector data of displacement under different scales were obtained. Through a series of tests, a scale of 960 metres was selected as the research unit and the displacement rate from 2004 to 2015 was obtained. Finally, a trend analysis of land subsidence was carried out on the basis of the Mann–Kendall mutation test. The results showed that single-year mutations were mainly distributed in the middle and lower parts of the Yongding River alluvial fan and the Chaobai River alluvial fan. Among these mutations, the greatest numbers occurred in 2015 and 2005, being 1344 and 915, respectively. The upper and middle alluvial fan of the Chaobai River, the vicinity of the emergency water sources, and the edge of the groundwater funnel have undergone several mutations. Combining hydrogeological data of the study area and the impact of the south-to-north water transfer project, we analysed the causes of these mutations. The experimental results can quantitatively verify the mutation information of land subsidence in conjunction with time series to further elucidate the spatial-temporal variation characteristics of land subsidence in the study area.

scholarly journals Characterization of land subsidence induced by groundwater withdrawals in Wenyu River alluvial fan, Beijing, China

2015 ◽  
Vol 372 ◽  
pp. 481-484
Author(s):  
R. Wang ◽  
Y. Luo ◽  
Y. Yang ◽  
F. Tian ◽  
Y. Zhou ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Land Subsidence ◽  
Monitoring Program ◽  
Alluvial Fan ◽  
Plain Area ◽  
Beijing Plain ◽  
Groundwater Overdraft ◽  
Subsidence Monitoring ◽  
Beijing China

Abstract. The Beijing plain area has suffered from severe land subsidence owing to groundwater overdraft. A major example is the Wenyu River alluvial fan in the Beijing plain area. This area has experienced as much as 10 m of land subsidence through 2000s. An integrated subsidence-monitoring program, including borehole extensometer and multilayer monitoring of groundwater, has been designed to meet the needs of monitoring land subsidence in this region. This work has allowed us to characterize land subsidence and understand the mechanical properties of the strata. The analysis results show the development of the land subsidence in this area is consistent with water-level change. The major strata contributing to compression deformation are Mid-Pleistocene stratum which contributed around 70 % of total subsidence. The shallow stratum and deep stratum show elastic mechanical behavior the intermediate stratum exhibit elastic-plastic mechanical behavior.

scholarly journals Assessment of the Impact of the Spatial Extent of Land Subsidence and Aquifer System Drainage Induced by Underground Mining

2020 ◽  
Vol 12 (19) ◽  
pp. 7871
Author(s):  
Artur Guzy ◽  
Agnieszka A. Malinowska
Keyword(s):  
Land Subsidence ◽  
Indirect Effects ◽  
Underground Mining ◽  
Regional Scale ◽  
Spatial Extent ◽  
Direct Effects ◽  
Hydrogeological Model ◽  
Mining Operations ◽  
Aquifer System ◽  
The Impact

The environmental impact assessment of underground mining usually includes the direct effects of exploitation. These are damage to rock mass and land subsidence. Continuous dewatering of the aquifer system is, however, necessary to carry out underground mining operations. Consequently, the drainage of the aquifer system is observed at a regional scale. The spatial extent of the phenomenon is typically much wider than the direct impact of the exploitation. The research presented was, therefore, aimed at evaluating both the direct and the indirect effects of underground mining. Firstly, the spatial extent of land subsidence was determined based on the Knothe theory. Secondly, underground mining-induced drainage of the aquifers was modeled. The 3D finite-difference hydrogeological model was constructed based on the conventional groundwater flow theory. The values of model hydrogeological parameters were determined based on literature and empirical data. These data were also used for model calibration. Finally, the results of the calculations were compared successfully with the field data. The research results presented indicate that underground mining’s indirect effects cover a much larger area than direct effects. Thus, underground mining requires a broader environmental assessment. Our results can, therefore, pave the way for more efficient management of groundwater considering underground mining.

scholarly journals Analysis of land subsidence changes on the Beijing Plain from 2004 to 2015

2020 ◽  
Vol 382 ◽  
pp. 291-296
Author(s):  
Lin Guo ◽  
Huili Gong ◽  
Xiaojuan Li ◽  
Lin Zhu ◽  
Wei Lv ◽  
...  
Keyword(s):  
Land Subsidence ◽  
Surface Deformation ◽  
Kendall Test ◽  
Alluvial Fan ◽  
Water Diversion ◽  
Grid Cells ◽  
Plain Area ◽  
Beijing Plain ◽  
Grid Unit ◽  
Geological Conditions

Abstract. Land subsidence, as a surface response to the development, utilization and evolution of underground space, has become a global and multidisciplinary complex geological environment problem. Since the 1960s, land subsidence has been developing rapidly in the Beijing Plain area. Against the backdrop of the integration of Beijing, Tianjin and Hebei in addition to “southern water” (South-to-North Water Diversion Project, SNWDP) entering Beijing, the systematic study of the evolution mechanism of land subsidence is of great significance for the sustainable development of the regional economy. Firstly, this study used ENVISAT ASAR and RADARSAT-2 data to obtain surface deformation information for the Beijing Plain area from 2004 to 2015 and then verified the results. Secondly, the study area was divided into units using a 960 m×960 m grid, and the ground settlement rate of each grid unit from 2004 to 2015 was obtained. Finally, the Mann–Kendall test was performed on the grid to obtain the mutation information for each grid unit. Combined with hydrogeology and basic geological conditions, we have attempted to analyze the causes of the mutations in the grid. The results show that 2347 grid cells were mutated in a single year, with most of these distributed across the Yongding River alluvial fan and the middle and lower parts of the Chaobai River alluvial fan. A total of 1128 grid cells were mutated in multiple years, with the majority of these cells mainly distributed across the upper-middle area of the alluvial fan, near the emergency water source and at the edge of the groundwater funnel. This study aims to provide favorable technical support and a scientific basis for urban construction in Beijing.

scholarly journals Mechanism of Land Subsidence Mutation in Beijing Plain under the Background of Urban Expansion

2021 ◽  
Vol 13 (16) ◽  
pp. 3086
Author(s):  
Lin Guo ◽  
Huili Gong ◽  
Yinghai Ke ◽  
Lin Zhu ◽  
Xiaojuan Li ◽  
...  
Keyword(s):  
Water Level ◽  
Land Subsidence ◽  
Human Activities ◽  
Urban Expansion ◽  
Regional Scale ◽  
Confined Water ◽  
Groundwater Exploitation ◽  
Beijing Plain ◽  
Subsidence Rate ◽  
Geological Conditions

Under the background of over-exploitation of groundwater and urban expansion, the land subsidence in the Beijing Plain has dramatically increased recently, and has demonstrated obvious mutation characteristics. Firstly, this paper used the land-use transfer matrix (LUTM) to quantify the urban expansion of Beijing, from 1990 to 2015. Secondly, the gravity center migration model (GCM) and standard deviation ellipse (SDE) methods were employed in order to quantitatively reveal the response relationship between urban expansion and land subsidence in the study area. Finally, the research innovatively combines multi-disciplinary (remote sensing, geophysical prospecting, spatial analysis, and hydrogeology), to analyze the mechanism of land subsidence mutation in the Beijing Plain, at multiple scales. The results showed the following: 1. The development direction of the urban expansion and the subsidence bowl (subsidence rate > 50 mm/year) were highly consistent, with values of 116.8° and 113.3°, respectively. 2. At the regional scale, the overall spatial distribution of subsidence mutations is controlled by the geological conditions, and the subsidence mutation time was mainly in 2005 and 2015. The area where mutation occurred in 2005 was basically located in the subsidence bowls, and the correlation between the confined water level and the subsidence rate was relatively high (r > 0.62). The area where the settlement mutation occurred in 2015, was mainly located outside the subsidence bowls, and the correlation between the confined water level and the subsidence rate was relatively low (r < 0.71). 3. In the typical subsidence area, the subsidence mutation occurred mostly in the places where the stratigraphic density is reduced, due to human activities (such as groundwater exploitation). Human activities caused the reduction in stratigraphic density, at 20 m and 90 m vertical depth in urban and rural areas, respectively. 4. At the local scale, clusters of subsidence mutation were located in the fault buffer zone, with a lateral influence range of nearly 1 km in Tongzhou. The scattered settlement mutation is distributed as a spot pattern, and the affected area is relatively small, which basically includes high-rise buildings.

scholarly journals ESTIMATING THE IMPACT OF URBAN EXPANSION ON LAND SUBSIDENCE USING TIME SERIES OF DMSP NIGHT-TIME LIGHT SATELLITE IMAGERY

2018 ◽  
Vol XLII-3 ◽  
pp. 691-698
Author(s):  
S. Jiao ◽  
J. Yu ◽  
Y. Wang ◽  
L. Zhu ◽  
Q. Zhou
Keyword(s):  
Land Subsidence ◽  
Urban Expansion ◽  
Regional Scale ◽  
Correlation Coefficients ◽  
Coefficient Of Determination ◽  
Night Time ◽  
Potential Threat ◽  
Persistent Scatterers ◽  
Sensing Technology ◽  
The Impact

In recent decades, urbanization has resulted a massive increase in the amount of infrastructure especially large buildings in large cities worldwide. There has been a noticeable expansion of entire cities both horizontally and vertically. One of the common consequences of urban expansion is the increase of ground loads, which may trigger land subsidence and can be a potential threat of public safety. Monitoring trends of urban expansion and land subsidence using remote sensing technology is needed to ensure safety along with urban planning and development. The Defense Meteorological Satellite Program Operational Line scan System (DMSP/OLS) Night-Time Light (NTL) images have been used to study urbanization at a regional scale, proving the capability of recognizing urban expansion patterns. In the current study, a normalized illuminated urban area dome volume (IUADV) based on inter-calibrated DMSP/OLS NTL images is shown as a practical approach for estimating urban expansion of Beijing at a single period in time and over subsequent years. To estimate the impact of urban expansion on land subsidence, IUADV was correlated with land subsidence rates obtained using the Stanford Method for Persistent Scatterers (StaMPS) approach within the Persistent Scatterers InSAR (PSInSAR) methodology. Moderate correlations are observed between the urban expansion based on the DMSP/OLS NTL images and land subsidence. The correlation coefficients between the urban expansion of each year and land subsidence tends to gradually decrease over time (Coefficient of determination R&amp;thinsp;=&amp;thinsp;0.80&amp;thinsp;&amp;ndash;&amp;thinsp;0.64 from year 2005 to year 2010), while the urban expansion of two sequential years exhibit an opposite trend (R&amp;thinsp;=&amp;thinsp;0.29&amp;thinsp;&amp;ndash;&amp;thinsp;0.57 from year 2005 to year 2010) except for the two sequential years between 2007 and 2008 (R&amp;thinsp;=&amp;thinsp;0.14).

scholarly journals Municipal level water security indices in Mexico

2019 ◽  
Vol 1 (10) ◽  
Author(s):  
Felipe I. Arreguin-Cortes ◽  
J. Raul Saavedra-Horita ◽  
J. Manuel Rodriguez-Varela ◽  
Velitchko G. Tzatchkov ◽  
Petronilo E. Cortez-Mejia ◽  
...  
Keyword(s):  
Local Level ◽  
Regional Scale ◽  
Water Security ◽  
Impact Factors ◽  
Groundwater Depletion ◽  
Access To Health Services ◽  
Population Vulnerability ◽  
Probabilistic Nature ◽  
The Impact ◽  
Municipal Level

Abstract As tends to be the case in other large, developing countries, Mexico is a nation of strong meteorological, hydrographic and social contrasts throughout its territory, which impact the various strata of the population in different ways. The current paper seeks to show how these contrasts create different water-security scenarios using pertinent indices. While some of the impact factors, such as precipitation, drought and floods, are of intrinsically probabilistic nature, others are related to population vulnerability. There have been a small number of studies on water security at global or regional scale that include Mexico, or at local level in Mexico, but none of them consider probabilistic aspects and population vulnerability, neither extend to municipal level. A probabilistic methodology was defined in this paper, and applied at municipal scale in Mexico, to obtain a water security index, which considers the concepts of risk, hazard and social vulnerability. Hazard comes in the form of water supply and drainage shortage, flooding, pollution, water quality, groundwater depletion and drought indicators. Vulnerability considers factors such as the educational level of the population, access to health services, illiteracy, housing conditions, unemployment and the proportion of indigenous language population. All these indicators are very heterogeneous throughout the Mexican territory. The proposed probabilistic methodology was applied in a geographic information system environment, and it was used to obtain water security indices for all municipalities in Mexico (2456 municipalities).

The Impact of Anglicizing Former German-Language Psychology Journals on Authorship and Citation Frequencies

2012 ◽  
Vol 17 (3) ◽  
pp. 190-198 ◽  
Author(s):  
Günter Krampen ◽  
Thomas Huckert ◽  
Gabriel Schui
Keyword(s):  
Side Effects ◽  
English Language ◽  
General Trend ◽  
Native Language ◽  
Impact Factors ◽  
German Language ◽  
Journal Articles ◽  
Number Of Citations ◽  
The Impact ◽  
Number Of Authors

Exemplary for other than English-language psychology journals, the impact of recent Anglicization of five former German-language psychology journals on (1) authorship (nationality, i.e., native language, and number of authors, i.e., single or multiple authorships), (2) formal characteristics of the journal (number of articles per volume and length of articles), and (3) number of citations of the articles in other journal articles, the language of the citing publications, and the impact factors (IF) is analyzed. Scientometric data on these variables are gathered for all articles published in the four years before anglicizing and in the four years after anglicizing the same journal. Results reveal rather quick changes: Citations per year since original articles’ publication increase significantly, and the IF of the journals go up markedly. Frequencies of citing in German-language journals decrease, citing in English-language journals increase significantly after the Anglicization of former German-language psychology journals, and there is a general trend of increasing citations in other languages as well. Side effects of anglicizing former German-language psychology journals include the publication of shorter papers, their availability to a more international authorship, and a slight, but significant increase in multiple authorships.

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