期刊：
International Journal of Environmental Research and Public Health,2022年19(17):10944- ISSN：1661-7827
通讯作者：
Xingming Li<&wdkj&>Lina Xiong
作者机构：
[Ma, Chenjiao; Nie, Silin; Zhang, Xiang] Cent China Normal Univ, China Inst Tourism, Wuhan Branch, Wuhan 430079, Peoples R China.;[Li, Xingming; Zhang, Xiang] Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;[Ma, Chenjiao; Li, Xingming; Nie, Silin; Zhang, Xiang] Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.;[Xiong, Lina] Colorado State Univ, Dept Human Dimens Nat Resources, Ft Collins, CO 80523 USA.
通讯机构：
[Xingming Li; Lina Xiong] A;Authors to whom correspondence should be addressed.<&wdkj&>Key Laboratory for Geographical Process Analysis & Simulation of Hubei Province, Central China Normal University, Wuhan 430079, China<&wdkj&>College of Urban and Environmental Science, Central China Normal University, Wuhan 430079, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>Department of Human Dimensions of Natural Resources, Colorado State University, Fort Collins, CO 80523, USA
关键词：
air pollution;inbound tourism;fixed effect model;Yangtze River Economic Belt;environmental impact
摘要：
The prevalent air pollution along the Yangtze River Economic Belt (YREB) possesses a significant threat to the natural environment, which further affects nearby tourism destination development. The paper seeks to assess the impact of air pollution on tourism in this region through a 2002-2012 panel data of 31 prefecture-level cities, along with geographic information system (GIS) and cluster analyses. The results reveal that air pollution is negatively associated with the number of inbound tourists along the YREB. In general, when air pollution intensifies by 1%, the number of inbound tourists decreases by 1.171%. This impact is more evident when air pollution is more severe, in the long term, and in areas that are larger, more central, and with more tourism resources. The paper contributes to the literature by addressing common limitations in previous studies and providing a more comprehensive evaluation of air pollution's impact on inbound tourism in the YREB. Practical implications regarding public policies and development directions based on air pollution periods, regions, and tourism resource allocations are provided.
期刊：
Science of The Total Environment,2022年816:151556 ISSN：0048-9697
通讯作者：
Fang, LC
作者机构：
[Fang, Linchuan; Fang, LC; Chen, Li] Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.;[Fang, Linchuan; Chen, Li] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China.;[Wang, Jingzhe] Shenzhen Univ, MNR Key Lab Geoenvironm Monitoring Great Bay Area, Shenzhen 518060, Peoples R China.;[Wang, Jingzhe] Shenzhen Univ, Guangdong Key Lab Urban Informat, Shenzhen 518060, Peoples R China.;[Wang, Jingzhe] Shenzhen Univ, Shenzhen Key Lab SpatialSmart Sensing & Serv, Shenzhen 518060, Peoples R China.
通讯机构：
[Fang, LC ] I;Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
关键词：
A global scale;Ecological risk;Health risk;Pollution assessment;Potentially toxic trace elements;U mine-associated soils
摘要：
Soil pollution by potentially toxic trace elements (PTEs) near uranium (U) mines arouses a growing interest worldwide. However, nearly all studies have focused on a single site or only a few sites, which may not fully represent the soil pollution status at the global scale. In this study, data of U, Cd, Cr, Pb, Cu, Zn, As, Mn, and Ni contents in U mine-associated soils were collected and screened from published articles (2006-2021). Assessments of pollution levels, distributions, ecological, and human health risks of the nine PTEs were analysed. The results revealed that the average contents of the U, Cd, Cr, Pb, Cu, Zn, As, Mn, and Ni were 39.88-, 55.33-, 0.88-, 3.81-, 3.12-, 3.07-, 9.26-, 1.83-, and 1.17-fold greater than those in the upper continental crust, respectively. The pollution assessment showed that most of the studied soils were heavily polluted by U and Cd. Among them, the U mine-associated soils in France, Portugal, and Bulgaria exhibited significantly higher pollution levels of U and Cd when compared to other regions. The average potential ecological risk value for all PTEs was 3358.83, which indicated the presence of remarkably high risks. Among the PTEs, Cd and U contributed more to the potential ecological risk than the other elements. The health risk assessment showed that oral ingestion was the main exposure route for soil PTEs; and the hazard index (HI) values for children were higher than those for adult males and females. For adult males and females, all hazard index values for the noncarcinogenic risks were below the safe level of 1.00. For children, none of the HI values exceeded the safe level, with the exception of U (HI = 3.56) and As (HI = 1.83), but Cu presented unacceptable carcinogenic risks. This study provides a comprehensive analysis that demonstrates the urgent necessity for treating PTE pollution in U mine-associated soils worldwide. (C) 2021 Elsevier B.V. All rights reserved.
期刊：
INTERNATIONAL JOURNAL OF HEALTH PLANNING AND MANAGEMENT,2022年37(6):3089-3102 ISSN：0749-6753
通讯作者：
Weidong Dai<&wdkj&>Weidong Dai Weidong Dai Weidong Dai
作者机构：
[Yu, Yang] Cent China Normal Univ, Sch Urban & Environm Sci, Wuhan, Hubei, Peoples R China.;[Ye, Aizhen] Zhejiang Univ Finance & Econ, Sch Data Sci, Hangzhou, Zhejiang, Peoples R China.;[Dai, Weidong; Liu, Xu; Chen, Cen] Zhejiang Univ Finance & Econ, Sch Publ Adm, Xueyuan Str,Xiasha Higher Educ Zone, Hangzhou 310018, Zhejiang, Peoples R China.
通讯机构：
[Weidong Dai; Weidong Dai Weidong Dai Weidong Dai] S;School of Public Administration, Zhejiang University of Finance and Economics, Hangzhou, Zhejiang, China
关键词：
chronic disease;family doctor system;health management;health policy;hierarchical diagnosis and treatment;public health
摘要：
OBJECTIVE: This study aims to examine whether participating in the contracted family doctor system increases patients' utilisation of primary care general practitioner for multiple disease outcomes in China. METHODS: Binary logistic regression models were estimated using data collected from 372 community residents in nine selected districts of Hangzhou, China. RESULTS: Findings revealed that (1) for patients with influenza, diabetes, upper respiratory infection, and gingivitis, those who participated in the contracted family doctor system were approximately 4.3 times, 98.4%, 92.5%, and 52.8% more likely to choose primary care general practitioners (GP) for their initial diagnosis, respectively, as compared with their counterparts who did not have contracted family doctors; (2) For patients with stroke or cerebrovascular disease and cholecystitis or cholelithiasis, those who had contracted family doctors were 1.111 times and 80.6% more likely to choose primary care GP for their subsequent disease maintenance, respectively, as compared to their counterparts without contracted family doctors. CONCLUSION: Our findings indicate that the contracted family doctor system not only increases the utilisation of primary care GP for patients with many chronic conditions but also promotes the overall completion of China's hierarchical medical system in the long run. Policy implications were provided to help policymakers actively construct and develop the contracted family doctor system to promote the hierarchical medical system in China.
通讯机构：
[Shukui Tan; Xuesong Zhang] C;College of Urban and Environmental Sciences, Central China Normal University, Wuhan, 430079, China<&wdkj&>College of Public Administration, Huazhong University of Science and Technology, Wuhan, 430079, China
关键词：
China;Environmental pollution;IV estimation;Land resource misallocation;Spatial durbin model;Threshold panel model
摘要：
Compared with other countries, China's local governments often adopt the land supply strategy of "low price and sufficient supply" for industrial land and "high price and limited supply" for commercial land in the allocation of land resources. The allocation of land resources is an important means to promote the rapid development of China's economy, and the impacts of land resource misallocation (LRM) on environmental pollution are increasingly apparent. This paper uses panel data from 30 provinces in China from 2009 to 2018 to discuss the relationship between LRM and environmental pollution. The ratio of the average price of commercial land to the average price of industrial land is used to measure the degree of LRM. The Ordinary Least Squares (OLS), spatial Durbin model (SDM), threshold model, and mediation effect model are used to study the direct effect, spatial spillover effect, nonlinear relationship, and conduction mechanism of LRM on environmental pollution. The results show that LRM significantly aggravated environmental pollution. This conclusion still holds after robustness tests including the substitution of dependent variables and IV estimates. The LRM aggravates environmental pollution through industrial structure and technological progress. Interestingly, the impact of LRM on environmental pollution also has a significant positive spatial spillover effect in adjacent regions. In addition, there is also evidence that the adverse effect of LRM on environmental pollution is nonlinear at different levels of industrial structure and technological progress. The threshold model shows that with the optimization of the industrial structure, the impact of LRM on environmental pollution shows a weakening trend of "inverted V-shaped", and with the advancement of technology, the impact of LRM on environmental pollution presents an "S-shaped" changing trend of "strong-weak-strong".
期刊：
Science of The Total Environment,2021年792:148396 ISSN：0048-9697
通讯作者：
Xiang Zhang
作者机构：
[An, Qi; Cao, Junjun] Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.;[Zhang, Xiang] China Univ Geosci Wuhan, Natl Engn Res Ctr Geog Informat Syst, Wuhan 430074, Peoples R China.;[Zhang, Xiang] China Univ Geosci Wuhan, Sch Geog & Informat Engn, Wuhan 430074, Peoples R China.;[Cao, Junjun] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China.;[Xu, Shan] Beijing Normal Univ, Fac Geog Sci, Inst Remote Sensing Sci & Engn, Beijing Engn Res Ctr Global Land Remote Sensing P, Beijing 100875, Peoples R China.
通讯机构：
[Xiang Zhang] N;National Engineering Research Center of Geographic Information System, China University of Geosciences (Wuhan), Wuhan 430074, China<&wdkj&>School of Geography and Information Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China
关键词：
Drought;Gross primary production;Solar-induced chlorophyll fluorescence;US Corn Belt;Vegetation indices
摘要：
Droughts represent one of the most severe abiotic stress factors that could result in great crop yield loss. Numer-ous vegetation indices have been proposed for monitoring the vegetation condition under stress and assessing drought impacts on yield loss. However, the understanding and comparison between traditional vegetation indi-ces (VIs) and the newly emerging satellite Sun-Induced Chlorophyll Fluorescence (SIF) for monitoring vegetation condition is still limited especially under drought stress and at multiple spatial scales. In this study, the potential of satellite observation SIF for monitoring corn response to drought was investigated based on the 2012 drought in the US Corn Belt. The standardized precipitation evapotranspiration index (SPEI) was used here to quantify drought. We found that all SPEI were above -1, except for July (-1.27), August (-1.39) and September (-1.14) in 2012, indicating the severity of this drought. We examined the relationship between satellite mea-surements of SIF, SIFyield, VIs (e.g., NDVI and EVI) and SPEI. Results indicated that SIFyield was sensitive to drought and SIF captured the stress more accurately both at the regional and state scales for the US Corn Belt. Quantita-tively, SIFyield had a high correlation with SPEI (r = 0.987, p < 0.05) over the entire Corn Belt, and it indicated losses in response to drought approximately one month earlier than SIF/NDVI/EVI. Furthermore, our results demonstrated that SIF could be trusted as an effective indicator to study the relationship between GPP (R-2 >= 0.8664, p < 0.01) under drought conditions across the Corn Belt. This study highlighted the advantage of using satellite SIF observations to monitor the drought stress on crop growth especially GPP at regional scale. (C) 2021 Elsevier B.V. All rights reserved.
关键词：
Hangzhou-Jiaxing-Huzhou plain (H-J-H Plain);Pollution hot spots;Positive matrix factor model (PMF);Potentially toxic elements (PTEs);Spatio-temporal variation;Temporal changes of sources
摘要：
The spatio-temporal variation and temporal changes in the sources of Cr, Pb, Cd, Hg, and As in soil on the Hangzhou-Jiaxing-Huzhou (H-J-H) Plain were analysed based on 4,359 soil samples collected in 2002 and 2012. Geostatistical and spatial analysis methods were used to explore the spatio-temporal variation in the pollution levels and 'pollution hotspots' for potentially toxic elements (PTEs), and the positive matrix factor model was used to quantitatively appoint and analyse temporal changes in PTE sources. The results indicated that the PTE content in most parts of the survey area were at a safe level in both 2002 and 2012, but a clearly upward trend was detected for Cr, Pb, and Cd. Moreover the pollution index for Cr, Pb, Cd, and the Nemerow composite pollution index increased in the west but decreased in the east of the H-J-H Plain from 2002 to 2012. The pollution index for Hg and As presented the opposite spatial pattern. It is obvious that there have been changes in the spatial pattern of pollution hotspots for PTEs on the H-J-H Plain from 2002 to 2012. Four sources of PTEs in soil were quantitatively appointed. In 2002, 2012, the dominant sources of Cr, Cd, Hg, and As were soil parent materials, industrial activities, atmospheric deposition and agricultural inputs, respectively. The dominant source of Pb in the soil changed from traffic emissions to soil parent materials, indicating the benefit of banning the use of leaded gasoline in China. This study highlights the importance of monitoring soil environmental quality and highlights the significance of spatio-temporal variation in PTEs in suburban zones or transitional areas undergoing rapid industrialization and urbanization, like the H-J-H Plain.
关键词：
Estimation mechanism;Predictive model;Proximal soil sensing;Soil heavy metal;Spectral derivative
摘要：
Heavy metal contamination of peri-urban agricultural soil is detrimental to soil environmental quality and human health. A rapid assessment of soil pollution status is fundamental for soil remediation. Heavy metals can be monitored by visible and near-infrared spectroscopy coupled with chemometric models. First and second derivatives are two commonly used spectral preprocessing methods for resolving overlapping peaks. However, these methods may lose the detailed spectral information of heavy metals. Here, we proposed a fractional-order derivative (FOD) algorithm for preprocessing reflectance spectra. A total of 170 soil samples were collected from a typical peri-urban agricultural area in Wuhan City, Hubei Province. The reflectance spectra and lead (Pb) and zinc (Zn) concentrations of the samples were obtained in the laboratory. Two calibration methods, namely, partial least square regression and random forest (RF), were used to establish the relation between the spectral data and the two heavy metals. In addition, we aimed to explore the use of spectral estimation mechanism to predict the Pb and Zn concentrations. Three model evaluation parameters, namely, coefficient of determination (R(2)), root mean squared error, and ratio of performance to inter-quartile range (RPIQ), were used. Overall, the spectral reflectance decreased with the increase in Pb and Zn contents. The FOD algorithm gradually removed spectral baseline drifts and overlapping peaks. However, the spectral strength slowly decreased with the increase in fractional order. High fractional-order spectra underwent more spectral noises than low fractional-order spectra. The optimal prediction accuracies were achieved by the 0.25- and 0.5-order reflectance RF models for Pb (validation R(2)=0.82, RPIQ=2.49) and Zn (validation R(2)=0.83, RPIQ=2.93), respectively. A spectral detection of Pb and Zn mainly relied on their covariation with soil organic matter, followed by Fe. In summary, our results provided theoretical bases for the rapid investigation of Pb and Zn pollution areas in peri-urban agricultural soils.
摘要：
The 'home-field advantage' (HFA) hypothesis states that litter decomposes faster in its 'home' habitat, i.e., in the same habitat as the plant species from which it was derived than it does 'away' from its home, i.e., in the habitat of a different plant species. However, studies pertaining to HFA in aquatic ecosystems are relatively few. One area not well-studied is whether the presence of living plants has an effect on the HFA of aquatic macrophyte decomposition in a eutrophic lake. Here, we conducted reciprocal litter transplanting experiments, coupled with removal of living plants, between a dominant submerged macrophyte (Myriophyllum spicatum) and a floating-leaved macrophyte (Trapa natans) in a eutrophic urban lake in China, for 50days. Test plots were created at sites by removing the dominant macrophytes from their 'home' habitats to test the effect of living plants on decomposition rates and HFA effect. The water chemistry of the two sites was not significantly different. The initial litter qualities were significantly higher in M. spicatum than in T. natans. The decomposition rates of T. natans were significantly greater in both the control and test plots in its 'home' habitat, indicating a positive HFA effect, while the decomposition rates of M. spicatum were significantly greater in the 'away' habitat compared to its 'home' habitat in all treatments, indicating a home-field disadvantage effect. The removal of living plants had a noticeable effect on the abundance of associated-macroinvertebrates, but had an inconsistent effect on decomposition rates providing conflicting evidence for HFA. In total, 10 macroinvertebrate taxa from four functional feeding groups (FFGs) were collected during the experiment. Compared to macroinvertebrate communities, microbial activities showed less correlation with decomposition rates. Our results provide evidence to suggest that decomposition-based HFA is dependent upon litter quality, habitat, and their interactions in a eutrophic urban lake.
关键词：
Fourier analysis;Interpolation;Polygons;Geographic information systems;Computer graphics;Experimental design;Ellipses;Algorithms
摘要：
This paper presents a morphing model of vector geographical data based on Fourier transformation. This model involves three main steps. They are conversion from vector data to Fourier series, generation of intermediate function by combination of the two Fourier series concerning a large scale and a small scale, and reverse conversion from combination function to vector data. By mirror processing, the model can also be used for morphing of linear features. Experimental results show that this method is sensitive to scale variations and it can be used for vector map features' continuous scale transformation. The efficiency of this model is linearly related to the point number of shape boundary and the interceptive value n of Fourier expansion. The effect of morphing by Fourier transformation is plausible and the efficiency of the algorithm is acceptable.
通讯机构：
[Yu, Guangming] C;Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.
关键词：
China;Crop water requirements;Food production;Regional water balance;Water resource management;Water-satisfied degree
摘要：
Water resources are one of the important factors that influence regional crop production and the food security of humans. Most traditional models of crop water demand analysis are built on the basis of a certain crop or macroscopic analysis, which neglect regional crop allocation and the difference of water demand in different crop growing periods. In this paper, a new assessing model, the satisfied degree of crop water requirement, is developed to assess the impacts of water resources on production of six main food crops in China. The six main food crops are spring wheat, winter wheat, corn, early season rice, middle-season rice and late rice. The results show that: (1) there are serious risks of water shortage in China, even in south China with its abundant precipitation; (2) the satisfied degree of crop water demand represents great temporal-spatial changes. On spatial distribution the risks are high in major bases of food production due to influences of cropping system and crop-combinations. Northwest China is a special interesting case. In seasonal fluctuation water shortage is severe in March and September. These risks seriously restrict food production in China. The results also show that the strategic measures of water resources management must be chosen carefully to deal with food security and regional sustainable development in China. (C) 2015 Elsevier B.V. All rights reserved.
期刊：
The Scientific World Journal,2014年2014:810782 ISSN：2356-6140
通讯作者：
Zhang, Hailin
作者机构：
[Dai, Shengli] Cent China Normal Univ, Sch Publ Management, Wuhan 430079, Peoples R China.;[Dai, Shengli] Cent China Normal Univ, Local Governance & Local Dev Res Ctr Hubei, Wuhan 430079, Peoples R China.;[Zhang, Hailin] Cent China Normal Univ, Sch Urban & Environm Sci, Wuhan 430079, Peoples R China.;[Zhang, Hailin] Cent China Normal Univ, Sch Urban & Environm Sci, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Hailin] C;Cent China Normal Univ, Sch Urban & Environm Sci, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
摘要：
Based on Theory of Evidence and reviewing research papers concerned, a concept model of knowledge sharing network among industrial cluster firms, which can be applied to assess knowledge sharing capacity, has been built. Next, the authors create a set of assessment index systems including twelve subindexes under four principle indexes. In this study, ten experts in the same field were invited to score all the indexes of knowledge sharing capacity concerning one certain industrial cluster. The research result shows relatively high knowledge network sharing capacity among the certain industrial cluster firms. Another conclusion is that the assessment method with Theory of Evidence is feasible to conduct such a research.
