作者机构：
[Deng, Zhiwei; Quan, Bin] Hengyang Normal Univ, Coll Geog & Tourism, Hengyang 421002, Peoples R China.;[Quan, Bin] Hengyang Base Int Ctr Space Technol Nat & Cultural, Hengyang 421002, Peoples R China.
通讯机构：
[Quan, B ] H;Hengyang Normal Univ, Coll Geog & Tourism, Hengyang 421002, Peoples R China.;Hengyang Base Int Ctr Space Technol Nat & Cultural, Hengyang 421002, Peoples R China.
关键词：
land use and land cover change;Intensity Analysis;change detection;Chang-Zhu-Tan Metropolitan Region
作者机构：
[Gao, Chanchan] Hengyang Normal Univ, Coll Geog & Tourism, Hengyang 421000, Peoples R China.;[Gao, Chanchan; Liu, Min] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China.;[Fang, Dekun; Zhang, Fengying] China Natl Environm Monitoring Ctr, Beijing 100012, Peoples R China.;[Wang, Qingtao] Hebei Univ Engn, Sch Landscape & Ecol Engn, Handan 056038, Hebei, Peoples R China.;[Liu, Min] China Acad Forens Sci, Key Lab Forens Sci, Minist Justice, Shanghai 200063, Peoples R China.
通讯机构：
[Min Liu] K;Key Lab of Forensic Science, Ministry of Justice, China (Academy of Forensic Science), Shanghai 200063, China<&wdkj&>Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
关键词：
Air pollution controls;Air quality;COVID-19;China;Harmonic model
摘要：
Air pollution is a threat to public health in China, and several actions and plans have been implemented by Chinese authorities in recent years to mitigate it. This study examined the spatial distribution of changes in urban air pollutants (UAP) in 336 Chinese cities from 2016 to 2020 and their responses to air pollution controls and the COVID-19 pandemic. Based on the harmonic model, decreases in fine particles (PM(2.5)), inhalable particles (PM(10)), nitrogen dioxide (NO(2)), sulfur dioxide (SO(2)), and carbon monoxide (CO) levels were found in 90.7%, 91.9%, 75.2%, 94.3%, and 88.7% of cities, respectively, while an increase in ozone (O(3)) was found in 87.2% of cities. Notable spatial heterogeneity was observed in the air pollution trends. The greatest improvement in air quality occurred mainly in areas with poor air quality, such as Hebei Province and its surrounding cities. However, some areas (i.e., Yunnan and Hainan provinces) with good air quality showed a worsening trend. During the 13th Five-Year Plan period (2016-2020), the remarkable effects of PM(2.5) and SO(2) pollution control plans were confirmed. Additionally, economic growth in 74.2% of the Chinese provinces decoupled from air quality after implementing pollution control measures. In 2020, several Chinese cities were locked down to reduce the spread of COVID-19. Except for SO(2), the national air pollution in 2020 improved to a greater extent than that in 2016-2019; In particularly, the contribution of simulated COVID-19 to NO(2) reduction was 66.7%. Overall, air pollution control actions improved urban PM(2.5), PM(10), SO(2), and CO, whereas NO(2) was reduced primarily because of the COVID-19 pandemic.
关键词：
Incentive measures;Pro-environmental behaviors;The theory of planned behavior;Tourism litter management;Travel companions
摘要：
Bringing self-generated litter down the mountain is an emerging pro-environmental behavior to solve the problem of trail's litter management in China. This study is the first attempt to explore a theoretical explanation model that explicates tourists' complex intention-forming process for engaging in it. The study extended the Theory of Planned Behavior model, including three additional explaining variables (environmental theory knowledge, environmental practice knowledge, and incentive measures), as well as a moderator of travel companions between subjective norm and the behavioral intention. The data were collected in questionnaire survey samples of 372 tourists in Huangshan National Park (HNP) and analyzed by the method of the structural equation model. The results showed that (1) attitude toward the behavior, subjective norm, perceived behavioral control and incentive measures significantly affected the behavioral intention; (2) environmental theory knowledge and environmental practice knowledge had indirect effects on the behavioral intention via the mediator of attitude toward the behavior; and (3) the strength of the relationship for the family group between subjective norm and the behavioral intention was significantly greater than the non-family group. Finally, we presented several effective suggestions to improve tourists' intention of bringing self-generated litter down the mountain. (C) 2018 Elsevier Ltd. All rights reserved.
期刊：
Applied Mechanics and Materials,2014年662:121-124 ISSN：1660-9336
通讯作者：
Huang, Chiqin
作者机构：
[Peng, Huijun; Huang, Chiqin] Hengyang Normal Univ, Dept Resources Environm & Tourism Management, Hengyang 421002, Peoples R China.
通讯机构：
[Huang, Chiqin] H;Hengyang Normal Univ, Dept Resources Environm & Tourism Management, Hengyang 421002, Peoples R China.
会议名称：
International Conference on Mechanical Engineering, Civil Engineering and Material Engineering
会议时间：
20140927-28
会议地点：
Wuhan
会议主办单位：
[Huang, Chiqin;Peng, Huijun] Hengyang Normal Univ, Dept Resources Environm & Tourism Management, Hengyang 421002, Peoples R China.
会议论文集名称：
Mechanical engineering, materials and information technology II: Selected, peer reviewed papers from the 2014 2nd International Conference on Mechanical Engineering, Civil Engineering andaterial Engineering (MECEM 2014), September 27-28, 2014, Wuhan, China
关键词：
Eco-environmental frangibility;Urban islet in river;Recreation area
摘要：
The islets in river are the most important recreation areas in city. The special geological conditions and geographical location determine the frangibility of the eco-environment. The inappropriate or excessive recreation development will cause the degradation even deterioration of the eco-environment system of urban islet in river. According to the characteristics of the eco-environmental frangibility of urban islet in river, the paper constructs a model of "formation-influence-regulation" and applies it to the Dongzhou Islet in Xiangjiang River.
摘要：
In the paper, Authors separately used analytical hierarchy process, expert scoring method, principal component and BP network to establish the weights of ecological vulnerability evaluation Index system in the Hengyang Basin as a case, and used hierarchical-comprehensive index -clustering model, principal component-comprehensive index-clustering analysis model, expert scoring-composite index-clustering analysis model, BP artificial neural network model to evaluate separately the reality vulnerability in 2000. The results shows that study area are moderate weak, and the results broadly similar. Authors think that Principal component and artificial neural network model can avoid subjective factors, and taking the way of the expert group judgment is to reduce the error of ecological vulnerability assessment. With the impact of global change and the strengthening of fragile ecosystems, China has carried out many researches and practices on vulnerability assessments[1,14]. Although Vulnerability assessment in many ways, not yet formed a unified evaluation method, this paper draw on previous evaluation methods based on [1,11], using AHP, principal component analysis, BP neural network and expert scoring method on quantitative assessment and analysis, then clustering the results by comparison to determine which method to evaluate the most accurate. Authors analysis the Hengyang Basin reality vulnerability in 2000, attempting to explore a more suitable and easy erosion in hilly areas degraded fragile vulnerability assessment method. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Conference ESIAT2011 Organization Committee.
作者机构：
[Zeng, Yongnian; 郑文武] Department of Surveying and Land Information Engineering, Central South University, South Lushan Road, Changsha 410083, China;[郑文武] Resources Environment and Tourism Management Department, Hengyang Normal University, 165 Huangbai Road, Hengyang 421008, China
通讯机构：
Department of Surveying and Land Information Engineering, Central South University, South Lushan Road, China
摘要：
Constructed wetlands have emerged as a viable option for helping to solve a wide range of water quality problems. However, heavy metals adsorbed by substrates would decrease the growth of plants, impair the functions of wetlands and eventually result in a failure of contaminant removal. Typha latifolia L., tolerant to heavy metals, has been widely used for phytoremediation of Pb/Zn mine tailings under waterlogged conditions. This study examined effects of iron as ferrous sulfate (100 and 500 mg/kg) and lead as lead nitrate (0, 100, 500 and 1000 mg/kg) on phosphorus utilization and microbial community structure in a constructed wetland. Wetland plants (T. latifolia) were grown for 8 weeks in rhizobags filled with a paddy soil under waterlogged conditions. The results showed that both the amount of iron plaque on the roots and phosphorus adsorbed on the plaque decreased with the amount of lead addition. When the ratio of added iron to lead was 1:1, phosphorus utilized by plants was the maximum. Total amount of phospholipids fatty acids (PLFAs) was 23%–59% higher in the rhizosphere soil than in bulk soil. The relative abundance of Gram-negative bacteria, aerobic bacteria, and methane oxidizing bacteria was also higher in the rhizosphere soil than in bulk soil, but opposite was observed for other bacteria and fungi. Based on cluster analysis, microbial communities were mostly controlled by the addition of ferrous sulfate and lead nitrate in rhizosphere and bulk soil, respectively.
