Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

49,248 Full-Text Articles 73,314 Authors 19,052,791 Downloads 356 Institutions

All Articles in Environmental Sciences

Faceted Search

49,248 full-text articles. Page 6 of 1457.

Advances In Research On Active Faults And Exploration Of Relevant Frontier Scientific Problems, XU Xiwei, LI Feng, CHENG Jia, LIU Baojin, CHEN Guihua, LI Kang, REN Junjie, JIA Qichao 2023 School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China

Advances In Research On Active Faults And Exploration Of Relevant Frontier Scientific Problems, Xu Xiwei, Li Feng, Cheng Jia, Liu Baojin, Chen Guihua, Li Kang, Ren Junjie, Jia Qichao

Coal Geology & Exploration

This study reviewed the approval and initiation processes and major research contents of China's active fault-related projects, such as the urban active fault survey projects, large-scale mapping programs of active faults, and the earthquake hazard assessment of active faults in key earthquake monitoring and prevention areas. By combining the scientific investigation results of the surface rupture zones induced by strong earthquakes over the past 20 years, this study elaborated on significant advances achieved in the following aspects: the survey and positioning techniques for concealed active faults under strong-noise and weak-signal conditions, the quantitative identification techniques for fault activity, theories and …


New Evidence For Holocene Activity Of The Northern Segment Of The Puqian-Qinglan Fault In Northern Hainan Province, LIU Huaguo, LI Feng, JIA Qichao, WANG Zhicheng, ZHANG Pan, LIN Zhen, ZHANG Jiehan, SHI Chunhua, ZHANG Yanbo, JIA Wei, LI Changlong 2023 China Earthquake Disaster Prevention Center, Beijing 100029, China

New Evidence For Holocene Activity Of The Northern Segment Of The Puqian-Qinglan Fault In Northern Hainan Province, Liu Huaguo, Li Feng, Jia Qichao, Wang Zhicheng, Zhang Pan, Lin Zhen, Zhang Jiehan, Shi Chunhua, Zhang Yanbo, Jia Wei, Li Changlong

Coal Geology & Exploration

The Puqian-Qinglan fault, located in northern Hainan Province, is closely related to the judgment of the seismogenic structure of the Qiongshan M7½ earthquake in 1605. To accurately determine the latest activity characteristics of this fault, this study, adopting artificial shallow seismic exploration with large-tonnage seismic sources combined with small-spacing cross-well stratigraphic correlation, investigated the sedimentary geological conditions of the Quaternary basalt cover and significantly thick marine sand layers in northern Hainan Province through exploration at Qishantou and Dongzhai villages in the Sanjiang Town, Jiangdong New Area, Haikou. Key results are as follows: (1) the Puqian-Qinglan fault dislocates multiple marker …


Activity Variations Of The Shanzuokou-Sihong Fault Within The Jiangsu Segment Of The Tancheng-Lujiang Fault Zone And Their Origins, ZHANG Hao, LI Wei, LI Limei, YAN Yunxiang, JIANG Xin, WANG Jinyan, ZHAO Qiguang, GU Qinping, XU Hangang 2023 Jiangsu Earthquake Agency, Nanjing 210014, China

Activity Variations Of The Shanzuokou-Sihong Fault Within The Jiangsu Segment Of The Tancheng-Lujiang Fault Zone And Their Origins, Zhang Hao, Li Wei, Li Limei, Yan Yunxiang, Jiang Xin, Wang Jinyan, Zhao Qiguang, Gu Qinping, Xu Hangang

Coal Geology & Exploration

The Shanzuokou-Sihong fault, having undergone the entire evolutionary process of the Tancheng-Lujiang fault zone, exhibits segmentation during the latest activity epoch. Determining the location and origin of its activity segmentation will provide a significant reference for exploring the activity variations of its branch faults and their origins. This study investigated the activity of the Shanzuokou-Sihong fault using a three-dimensional approach combining field geological surveys, shallow seismic exploration, and cross-well stratigraphic correlation. The results show that the Shanzuokou-Sihong fault is a Late Pleistocene active fault on the east side of the North Maling Mountain and a Middle Pleistocene fault in Xinyi …


Application Of High-Precision Lidar Technology In Research On Active Fault-Induced Offset Geomorphic Features - A Case Study Of The Juxian-Tancheng Segment Of The Yishu Fault Zone, YANG Bin, WANG Hualin, WU Hongbin, GE Fugang, ZOU Hao, SU Sili 2023 Shandong Earthquake Agency, Jinan 250014, China

Application Of High-Precision Lidar Technology In Research On Active Fault-Induced Offset Geomorphic Features - A Case Study Of The Juxian-Tancheng Segment Of The Yishu Fault Zone, Yang Bin, Wang Hualin, Wu Hongbin, Ge Fugang, Zou Hao, Su Sili

Coal Geology & Exploration

The Tancheng-Lujiang fault zone (also referred to as the TanLu fault zone), one of the most significant large-scale active faults in eastern China, has great seismogenic potential while passing through several cities with the activities and accumulation of human beings. To investigate the geometric distribution and activity characteristics of the TanLu fault zone, this study focused on the Juxian-Tancheng segment of the Yishu fault zone—a part of the TanLu fault zone. Given the vegetation coverage in eastern China, airborne light detection and ranging (LiDAR) and terrestrial laser scanning were employed to collect high-precision topographic data of the Zuoshan (Yibujian), Zhonghuashan, …


Optimization Of Data Acquisition Parameters For Deep Seismic Reflection Surveys In Complex Terrain, YAN Yunxiang, LI Pei, ZHI Min, LIU Jianda, WANG Zichen, ZHANG Ying, PEI Gendi, LI Linyuan, MOU Qi, JIA Jin 2023 CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China

Optimization Of Data Acquisition Parameters For Deep Seismic Reflection Surveys In Complex Terrain, Yan Yunxiang, Li Pei, Zhi Min, Liu Jianda, Wang Zichen, Zhang Ying, Pei Gendi, Li Linyuan, Mou Qi, Jia Jin

Coal Geology & Exploration

Fujian, located in the orogen region of the coastal areas of southeast China, exhibits well-developed structures and complex surface conditions, which make deep seismic reflection surveys challenging. In response to the diversity and complexity of seismogeological conditions in Fujian, this study optimized the seismic excitation means based on previous deep seismic surveys. Specifically, the combination of large, medium, and small guns was transitioned into the layout of normal guns (spacing of shot points: 600 m) and large shots (spacing of shot points: 15 km), leading to enhanced folds of large shots. Through simulation analysis, this study calculated the spacing of …


Revealing Fine-Scale Crustal Structure And Tectonic Features In The Xiong’An New Area And Its Periphery Using Deep Seismic Reflection Profiling, YUE Hangyu, WANG Kai, WANG Xiaojiang, ZHANG Baowei, ZHANG Kai 2023 Center for Geophysical Survey, China Geological Survey, Langfang 065000, China; Technology Innovation Center for Earth Near Surface Detection, China Geological Survey, Langfang 065000, China; Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China; National Center for Geological Exploration Technology, Langfang 065000, China; School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China

Revealing Fine-Scale Crustal Structure And Tectonic Features In The Xiong’An New Area And Its Periphery Using Deep Seismic Reflection Profiling, Yue Hangyu, Wang Kai, Wang Xiaojiang, Zhang Baowei, Zhang Kai

Coal Geology & Exploration

As an effective method to accurately reveal the deep geological structures and tectonic features of the Earth, deep seismic reflection profiling has been increasingly applied to the exploration of the continental and oceanic crusts, as well as the upper mantle of the lithosphere, making it internationally recognized pioneer technique for deep Earth exploration. This study examined the deep seismic reflection profile spanning across the Xiong’an New Area in Hebei Province, aiming to reveal the crustal structure and tectonic features of the study area. Key findings are as follows: (1) The crust in the study area can be divided into the …


Analogue Modeling Of Love-Type Channel Waves And Their Response To Faults, LIU Qiang, HU Jiwu, WANG Pan, SHI Xianxin, JIA Qian 2023 CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; CCTEG Xi’an Transparent Geology Technology Co., Ltd., Xixian 712000, China

Analogue Modeling Of Love-Type Channel Waves And Their Response To Faults, Liu Qiang, Hu Jiwu, Wang Pan, Shi Xianxin, Jia Qian

Coal Geology & Exploration

Owing to its high resolution and low energy attenuation, channel wave-based seismic exploration has been widely applied in the geophysical prospecting of hidden disaster-causing factors in underground coal mines. However, its accuracy fails to meet the requirements of intelligent mine mining presently. At present, the analogue modeling of channel waves mostly focuses on Rayleigh-type channel waves using 2D models, leading to a lack of research on Love-type channel waves. To explore the propagation law of Love-type channel waves, this study investigated the waves in the 3D analogue modeling of channel waves. Firstly, the wave and particle vibration characteristics of Love-type …


Revealing The Upper Crustal Structure In The Fujian Region Using Deep Seismic Profiling, LI Pei, REN Congrong, LI Haiyan, WANG Shanxiong 2023 Fujian Earthquake Agency, Fuzhou 350001, China

Revealing The Upper Crustal Structure In The Fujian Region Using Deep Seismic Profiling, Li Pei, Ren Congrong, Li Haiyan, Wang Shanxiong

Coal Geology & Exploration

The Fujian region, located along the southeastern margin of the Chinese continent, constitutes an active tectonic belt along the coastal area in southeast China, with complex formation and evolution histories. To understand the characteristics of upper crustal structures and basement structures in the Fujian, this study collected the Pg travel time data from four NE-trending deep seismic sounding (DSS) survey lines in the region. Employing finite-difference tomography, this study obtained the fine-scale velocity structure of the upper crust along the four profiles, revealing the lateral variations in the upper crustal velocity structure, basement structures, and shallow fault characteristics in the …


Multipoint Sources-Based High-Resolution Electrical Detection Of The Water-Rich Areas Near Mining Faces Of Coal Mine Roadways, WU Rongxin, XU Hui 2023 Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining, Huainan 232001, China; School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China

Multipoint Sources-Based High-Resolution Electrical Detection Of The Water-Rich Areas Near Mining Faces Of Coal Mine Roadways, Wu Rongxin, Xu Hui

Coal Geology & Exploration

To accurately explore the spatial distribution of water-rich areas near mining faces of mine roadways, this study proposed a multipoint sources-based high-resolution electrical detection technology. A multi-channel electrode observation system was arranged behind a roadway mining face, with electrodes at a distance of 1/4 measuring lines behind the mining face as point source electrodes sequentially. Data were collected using a monopole-dipole device, with the obtained apparent resistivity considered the sounding data of multipoint sources-based electrical detection. The images of multipoint sources-based electrical sounding allow for quickly determining the presence of water-rich areas and their locations relative to the mining faces …


Application Of Integrated Geophysical Surveys In The Identification Of Hidden Fire Sources In Spontaneous Combustion Zones In Coal Seams, MA Zijun, YANG Haiyan, LI Wenyu, XU Yunlei, HE Yunlan, LIU Zhuoming, LI Peng, HUANG Jiu 2023 School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China

Application Of Integrated Geophysical Surveys In The Identification Of Hidden Fire Sources In Spontaneous Combustion Zones In Coal Seams, Ma Zijun, Yang Haiyan, Li Wenyu, Xu Yunlei, He Yunlan, Liu Zhuoming, Li Peng, Huang Jiu

Coal Geology & Exploration

Spontaneous combustion in coal seams, a factor influencing the development of many mining areas in China, can cause severe coal resource loss and environmental pollution. The positioning and distribution identification of hidden fire sources can provide an important basis for coal mine enterprises to prepare prevention and control measures. They are also a hot research topic and challenge in the field of coal fire disasters. Suitable channels for ventilation and oxygen supply are necessary for spontaneous combustion in coal seams. When the oxidative heat release rate of coals exceeds the heat dissipation rate, coal temperature will rise until the occurrence …


Dual-Frequency Transmission Radio Wave-Based Exploration Method And Its Application, FU Xianjie, HU Ze'an, WU Rongxin, LI Peng 2023 China Coal Xinji Energy Co., Ltd., Huainan 232170, China

Dual-Frequency Transmission Radio Wave-Based Exploration Method And Its Application, Fu Xianjie, Hu Ze'an, Wu Rongxin, Li Peng

Coal Geology & Exploration

Coal seams can act as the guided wave layers of high-frequency electromagnetic waves, and radio wave perspective technology can be used to detect geological structures within coal seams of a working face. Presently, radio wave perspective methods usually use a single frequency, leading to some problems such as improper frequency selection and limited detection accuracy in the exploration of mining faces. In response, this study developed a dual-frequency transmission radio wave-based exploration method. Based on theoretical analysis, as well as the field strength of dual-frequency perspective and attenuation coefficient, this study derived the calculation formula for the absorption factor γ …


Chromium-Contaminated Sites: Migration Characteristics And Monitoring Using Dual-Frequency Ip Method, WEI Kaiyao, LIU Zhimin, LIANG Chen, ZHANG Jie, MA Qiang 2023 School of Mechanical and Equipment Engineering, Hebei University of Engineering, Handan 056038, China; Hebei Province Jinan New Area Modern Equipment Manufacturing Collaborative Innovation Center, Handan 056038, China

Chromium-Contaminated Sites: Migration Characteristics And Monitoring Using Dual-Frequency Ip Method, Wei Kaiyao, Liu Zhimin, Liang Chen, Zhang Jie, Ma Qiang

Coal Geology & Exploration

Given that the migration process of chromium-contaminated sites is subjected to various uncertainties, it is difficult to investigate the migration characteristics and explore the monitoring process using experiments. Based on the basic law of groundwater flow and the migration mechanisms of pollutants, this study conducted a simulation analysis of the migration characteristics of static chromium contamination sources and the law of changes in the migration characteristics using the COMSOL software. Then, this study verified the reliability and accuracy of numerical forward simulations through physical simulation experiments on a static soil bin. Specifically, using the model of chromium contamination source migration …


Mechanical Behavior And Failure Response Characteristics Of Hard Sandstones Considering Bedding Dip Angles, SONG Zhanping, LIU Hongke, ZHENG Fang, CHENG Yun, SUN Yinhao, SONG Wanxue 2023 School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an 710055, China; Institute of Tunnel and Underground Structure Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

Mechanical Behavior And Failure Response Characteristics Of Hard Sandstones Considering Bedding Dip Angles, Song Zhanping, Liu Hongke, Zheng Fang, Cheng Yun, Sun Yinhao, Song Wanxue

Coal Geology & Exploration

This study focuses on the mechanical behavior and failure responses of hard sandstones considering bedding dip angles. Through uniaxial compression tests of hard sandstones with different bedding dip angles, this study delved into the influence of bedding dip angles on the mechanical behavior of hard sandstones and the relationship between the bedding dip angles and fractal characteristics of hard sandstone fragments. The test results show that bedding dip angles produced negligible effects on the type of the stress-strain curves of hard sandstones. However, low dip angles (0°, 22.5°, and 45°) corresponded to unimodal curves, while high dip angles (67.5° and …


Coal-Based Solid Waste From The Panyi Mine In The Huainan Mining Area: Fine-Scale Chemical Structure And Ecological Risk Assessment Of Heavy Metals, YIN Wenwen, ZHANG Liqun, DING Dan, SHAN Shifeng, CHEN Yongchun, AN Shikai, ZHENG Liugen 2023 School of Resource and Environmental Engineering, Anhui University, Hefei 230601, China

Coal-Based Solid Waste From The Panyi Mine In The Huainan Mining Area: Fine-Scale Chemical Structure And Ecological Risk Assessment Of Heavy Metals, Yin Wenwen, Zhang Liqun, Ding Dan, Shan Shifeng, Chen Yongchun, An Shikai, Zheng Liugen

Coal Geology & Exploration

The utilization of clean coal-based solid waste is a pressing issue in the ecological construction of mining areas. To address this issue, the key is to ascertain the structures and morphology of heavy metals in coal-based solid waste. This study investigated the coal gangue and fly ash samples from the Panyi Mine in the Huainan mining area, Anhui Province. First, this study characterized the coal-based solid waste using microanalysis methods, such as X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). Then, it examined the fine-scale chemical structure and heavy metal dissemination …


Current States , Prediction And Prevention Suggestions For Water Hazard Accidents In China’S Coal Mines, SUN Wenjie, LI Wenjie, NING Dianyan, REN Lingfeng 2023 Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 710077, China; National Coal Mine Water Hazard Prevention Engineering Technology Research Center, China University of Mining and Technology (Beijing), Beijing 100083, China

Current States , Prediction And Prevention Suggestions For Water Hazard Accidents In China’S Coal Mines, Sun Wenjie, Li Wenjie, Ning Dianyan, Ren Lingfeng

Coal Geology & Exploration

At present, the pattern of coal resource development in China has changed, but the water hazard accidents that restrict the safety production of coal mine still occur from time to time. In order to explore the characteristics and laws of water hazard accidents in coal mines in China and scientifically study and judge the evolution trend of water hazard accidents, study was performed in terms of the year, region, accident level and influencing factors of water hazard accidents, with the nationwide water hazard accidents from 2001 to 2022 as the statistical objects. Meanwhile, the Long Short-Term Memory (LSTM) model was …


Community Resilience And Creating Capacities For Risk Reduction In First Nations Communities, Case Study In Minegoziibe Anishinabe (Pine Creek First Nation), Brittany S. Lavallee 2023 SIT Graduate Institute/SIT Study Abroad

Community Resilience And Creating Capacities For Risk Reduction In First Nations Communities, Case Study In Minegoziibe Anishinabe (Pine Creek First Nation), Brittany S. Lavallee

Capstone Collection

The colonization of Indigenous peoples in Canada has serious consequences on First Nations, including forced removal and displacement from their ancestral lands, environmental degradation, declining resources and capacities, and human rights violations. First Nations communities are currently facing the amplified effects of human-driven climate change. Sustainability of the environment is not just a concept, but a practiced way of life, that recognizes the interdependence of all living things. This deep respect for Aki (earth) is at the foundation of First Nations cultures and continues to guide their actions to insure better futures for Seven Generations. The community of Minegoziibe Anishinabe …


Research On Geographical Landscape Design Of Ecological Civilization Construction In China, Wenzhong ZHANG, Jianhui YU 2023 Key Laboratory of Regional Sustainable Development Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China University of Chinese Academy of Sciences, Beijing 100049, China

Research On Geographical Landscape Design Of Ecological Civilization Construction In China, Wenzhong Zhang, Jianhui Yu

Bulletin of Chinese Academy of Sciences (Chinese Version)

As the fundamental goal of ecological civilization construction in the new era of China, the building of a Beautiful China is an important measure to promote the study of Chinese man-land relationships to a higher level and a new stage of development. This study takes the construction of ecological civilization of Beautiful China as the orientation, and carries on the frame design to the geographical landscape. The geographical landscape takes the elements of geoscience as the research object and makes a series of reasonable outlook about man-land system according to the interaction mechanism of human-land relationship and the influence of …


Challenges And Countermeasures For Treatment And Remediation Of Contaminated Mega-Sites In China, Xiaoyong LIAO, Yixuan HOU, You LI, Tianyi WANG 2023 CAS Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Challenges And Countermeasures For Treatment And Remediation Of Contaminated Mega-Sites In China, Xiaoyong Liao, Yixuan Hou, You Li, Tianyi Wang

Bulletin of Chinese Academy of Sciences (Chinese Version)

The treatment and remediation of pollution at contaminated mega-sites poses a significant challenge in the environmental science both domestically and internationally. Contaminated mega-sites are characterized by their widespread impact, multiple types of pollutants, and significant ecological and environmental threats. The environmental behavior cognition and efficient remediation at contaminated mega-sites face enormous challenges, among which key technological issues such as the formation mechanism of soil and groundwater pollution, accurate identification of pollution sources, and intelligent decision-making optimization urgently need to be solved. In China, contaminated mega-sites are concentrated in economically developed regions such as Beijing-Tianjin-Hebei, the Yangtze River Economic Belt, and …


Spatial Agglomeration And Environmental Effects Of Heavy Polluting Industries In China: Characteristics And Enlightenment, Hongyang CHEN, Jianhui YU, Wenzhong ZHANG 2023 CAS Key Laboratory of Regional Sustainable Development Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

Spatial Agglomeration And Environmental Effects Of Heavy Polluting Industries In China: Characteristics And Enlightenment, Hongyang Chen, Jianhui Yu, Wenzhong Zhang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Heavy polluting industries are the important sources of industrial pollutant. Understanding the spatial agglomeration characteristics, influencing factors, agglomeration mechanism and environmental effects of China’s heavy polluting industries can help identify potential pollution risk areas to cope with increasingly severe environmental pollution problems. Based on the industrial economic data from 1999 to 2021, the spatial distribution and agglomeration characteristics of heavy polluting industries are characterized. It is found that: (1) Shandong, Jiangsu, Zhejiang, and Guangdong are the regions with high output value of the development of heavy polluting industries in the past 20 years, while Xinjiang, Inner Mongolia, Shanxi, Shaanxi, Henan, …


Five Issues And Countermeasures Of China Cropland Resource Use, Sijing YE, Changqing SONG, Changxiu CHENG, Peichao GAO, Shi SHEN, Wangshu MU 2023 State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

Five Issues And Countermeasures Of China Cropland Resource Use, Sijing Ye, Changqing Song, Changxiu Cheng, Peichao Gao, Shi Shen, Wangshu Mu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Understand the cropland use situation, analyze management countermeasures, and explore the regional suitable cropland use mode are important prerequisites for the implementation of the strictest protection of cultivated land strategy with Chinese characteristics. At present, the cropland resource utilization in China is facing the five issues of non-agricultural, non-grain, fragmentation, marginalization, and ecological degradation. This study estimates the spatial-temporal changes of these cropland use issues in China, analyzes the challenges of cropland use governance from the aspects of complex driving factors, phase characteristics, cognitive differences of responsible subjects, and dynamic changes of external factors. On this basis, the countermeasures of …


Digital Commons powered by bepress