Ecological Environmental Impact Research Articles

Study on the Movement of Overlying Rock Strata and Surface Movement in Mine Goaf under Different Treatment Methods Based on PS-InSAR Technology

The goaf treatment of underground metal mines is an important link in mining, and it is particularly important to master the laws of overlying rock strata and surface movement of goaf. In this paper, Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) technology is used to monitor the surface subsidence of the Taibao lead-zinc mine, and the surface subsidence laws of goaf-closure, partial-filling, and full-filling treatments are analyzed by the time-series method. The findings indicate that the surface subsidence of the closed goaf is solely governed by the pillars, with the quality of these pillars playing a pivotal role in controlling such subsidence. Factors like stope span also influence the surface subsidence of partially filled goaf. Prior to compaction, it is primarily the pillars that control surface subsidence; however, after compaction, filling and pillars jointly regulate this phenomenon. Notably, in filled goaf, the quality of both roof and pillars significantly impacts surface subsidence. Before compaction occurs, control over surface subsidence is not evident, yet post-compaction, the filling is effective and tends to stabilize this process. The research findings are significant in enhancing goaf’s treatment efficacy, mitigating surface damage and minimizing ecological environmental impact.

Evaluation and quantitative characterization for the ecological environment impact of open pit mining on vegetation destruction from landsat time series: A case study of Wulishan limestone mine

Quantitatively evaluating the ecological environment impacts of vegetation destruction due to open-pit mining activities is vital for enhancing the green mining standard and cost management capabilities of mining enterprises. Based on the Landsat time series, this study proposes an ecological environment impact assessment and quantitative characterization method for vegetation destruction in mining areas resulting from open-pit mining activities. First, the modified normalized difference water index and the normalized difference vegetation index time series data were calculated. The water body thresholds and the fraction of vegetation coverage were ascertained using the K-means clustering algorithm and the dimidiate pixel model, respectively, to determine the area of direct vegetation destruction in mining areas. Second, utilizing the Theil-Sen Median trend analysis and the Mann-Kendall test, the indirect impact area of vegetation in the mining region was identified. Lastly, by integrating vegetation's net primary productivity with the Chinese Emission Allowance price index, the total carbon emission cost of vegetation destruction due to mining activities over 20 years was calculated to be about 2.122 million yuan. The findings indicated that the ecological environmental impact of open-pit mining activities on vegetation destruction cannot be ignored. From 2000 to 2020, open-pit mining at the Wulishan limestone mine in Anhui Province, China, increased the area of direct vegetation destruction by 9.072 × 105 m2, and the indirect impact area on vegetation was 7.371 × 105 m2. The carbon emission cost of vegetation destruction in the direct destruction area was about 104,000 yuan per year, and the carbon emission cost of vegetation damage in the indirect impact area was approximately 2,082.53 yuan per year. This research provides a scientific foundation for ecological environmental protection, regulations, green mining, and cost management for mining enterprises, promoting the harmonious progress of both the economy and environmental protection.

Ecological and Geochemical Assessment of Snow Cover in the Area Affected by the Apatite–Nepheline Production of the Kola Peninsula

The chemical composition of the snow cover in the area of industrial development of the apatite–nepheline deposit is analyzed to estimate the ecological and geochemical environmental impact of the mining enterprise. It has been established that the snow of the studied area of the Khibiny is enriched in Cl– and Na+ ions (on average 38 and 41 µeq/L), and relations between basic ions (Cl– and Na+ Ca2+ K+ = Mg2+) and mineralization value (from 1.7 to 6.4 mg/L) are typical for precipitates in the coastal regions of the northern European Russia. The average content of total nitrogen and phosphorus in the snow of the impact zone is 495 and 26 μg/L, respectively, which is 3 and 5 times higher than in the background zone. This is explained by their influx into the atmosphere with dust emissions from the mining enterprise. The content of organic matter (CODMn and TOC 5.5 and 5.8 mg/L) in the snow of the impact zone is about two times higher than in the snow of the background zone and in the water of the Khibiny water bodies. Probably, the elevated content of organic matter in the snow is associated with the supply of organic substances-reagents from the tailing dump, which are used to obtain apatite concentrate, as well as the intensive growth of unicellular green algae Chlamydomonas nivalis (Bauer) Wille under conditions of an increased content of nutrients and long daylight hours. The concentrations of a number of heavy metals (Zn, Mn, Cu, Cr, Pb, Cd) in the snow of the impact zone exceed their contents in the water of water body of the impact zone (13.4, 5.4, 3.8, 0.8, 0.65, 0.035 μg/L, respectively). These metals enter the snow as a part of dust emissions from the mine, and as polluted air masses from the industrial regions of Eurasia.

Research on CLUFS and Its Application in Rapid Prediction of the Impact of Regulating Services Value in Construction Projects

With the development of human society and the acceleration of urbanization, the impact of construction projects on the ecological environment is increasingly attracting attention. Conducting an ecological environmental impact assessment of construction projects is crucial to protect the ecological environment and achieve sustainable development. To estimate how construction projects would affect the value of ecosystem services, this paper develops the China Land Use Feature Data Sets (CLUFS) and uses the Beijing “One Line Four Mines” project as an example. Research found that the project’s conservation and restoration zone and the landscape construction zone will significantly enhance the ecosystem regulation services value. The conservation and restoration zone will increase by 30% from the current 1.413 billion yuan per year to 1.836 billion yuan per year, and the landscape construction zone will increase by 69% from the current 400 million yuan per year to 676 million yuan per year. The tourism development zone, dominated by urban construction, will result in a decrease in ecosystem regulation services, from 19.26 million yuan per year to 17.60 million yuan per year by 9%. Overall, the “One Line Four Mines” project achieved a balance of ecological value and surplus. The method proposed in this paper for predicting the impact of ecosystem regulation services value on construction projects can be used to quickly evaluate the effects of different planning schemes on the ecosystem services value of land parcels to help urban planning decision-makers control the condition of land use. It can provide new indicators for the ecological environment department to incorporate ecological benefits into the evaluation system of planning schemes and new methods for evaluating the ecological protection effectiveness of projects.

Study on ecological environment impact and soil and water conservation technology of power transmission and transformation projects in typical ecologically fragile areas in western China

In the steady development of social and economic, the field of power transmission and transformation engineering construction in our country gradually forms a new electric power development pattern, providing a solid foundation for the innovative development of electric power enterprises in a new era. Since power transmission and transformation projects will cause serious soil and water loss, which will have a direct impact on the stability of ecological environment in various regions, which is not conducive to the construction and operation of power transmission and transformation projects and the long-term development of social economy, how to construct a safe and standardized construction environment, scientifically deal with the ecological environment problems of power transmission and transformation projects, and rationally use soil and water conservation technology? It is the main problem that Chinese scholars study and discuss at present. On the basis of understanding the environmental status of typical ecologically fragile areas in western China, and according to the development of soil and water conservation technology in power transmission and transformation projects, this paper mainly studies the online monitoring system and application technology of soil and water conservation for power transmission and transformation projects in a certain area, so as to provide effective basis for the construction management of power transmission and transformation projects in the new era.

Lost in Translation: Overcoming Distinctions in Worldviews in Environmental Impact Assessments in Canada and Russia

How would the usage of Indigenous languages contribute to overcoming the epistemological gap between Traditional Ecological Knowledge and Environmental Impact Assessments? This article examines incommensurabilities that arise in Sakha-Russian and Cree-English translations of EIA through the translations of the most common words in samples. Without being embedded in Indigenous languages, TEK and other knowledges are easily decontextualized, and results in the loss of layers of meaning. This study adopted a linguistic anthropological approach to language combined with content analysis and guided by a poststructuralist mode of analysis. We argue policies around EIA/EAs must be shifted to center Indigenous languages as the source of TEK and ensure that there is space for these languages to be used in the consultation processes.

A Comprehensive Evaluation Model Based on the Environmental Impact of Saihanba

China Saihanba Forest Farm has become an ecological green farm with stable sand control function, and an ecological environmental impact assessment model is constructed according to the ecological model of Saihanba Forest Farm. According to the seven data indicators collected, this article uses principal component analysis to analyze. From the principal component scores, it can be seen that there is a significant difference in the scores before and after restoration, indicating that the impact of Saihanba Forest Farm on the ecological environment before and after restoration is very significant. At the same time, in order to establish ecological regions more accurately and extend the ecological protection model to the whole country, based on the AHP (Analytic Hierarchy Process) and TOPSIS (Distance between superior and inferior solutions), a model is established to calculate the comprehensive evaluation indicators of the ecological environment in Liaoning, Ningxia, and Shanxi provinces. The scores of the comprehensive evaluation indicators are used to determine the establishment of ecological zones in Ningxia and Shanxi provinces.

Synergistic effects of technological innovation, industrial structure upgrading, and ecological environment optimization—evidence from China

The benign interaction between technological innovation, industrial structure, and ecological environment optimization is important for the sustainable development of China’s economy. Based on panel data from 30 provinces (municipalities) in China from 2003 to 2019, a coupling coordination degree (CCD) model was adopted to evaluate the coordinated development level of the technological innovation-industrial structure-ecological environment system (TIE). Fixed-effect models were used to explore the subsystem impact on the coupling coordination level. A fully modified least-squares (FMOLS) method was used to analyze TIE subsystem interactions. The results show the following: (1) The coordinated development level of TIE has steadily improved. The CCD of the TIE was high in the east, flat in the center, and low in the west. (2) Subsystem development significantly and positively affected the degree of coupling coordination. The ecological environmental impact on the coordinated development level was the largest in the eastern regions and the influence of technological innovation on the coordinated development level was the largest in the central and western regions. (3) Industrial advancement had a positive impact on technological innovation in 30 provinces as a whole, and in the eastern, central, and western regions. A “U”-shaped relationship was found between technological innovation and industrial advancement in all 30 provinces, and in the eastern, central provinces. Industrial rationalization, industrial advancement, and technological innovation can promote the improvement of the ecological environment in all 30 provinces, and the eastern, central, and western regions.

Spatiotemporal behavior pattern differentiation and preference identification of tourists from the perspective of ecotourism destination based on the tourism digital footprint data.

Tourist impact management in ecotourism destinations requires an accurate description of tourists' spatiotemporal behavior patterns and recreation preferences to minimize the ecological environmental impact and maximize the recreation experience. This study classified tourist behaviors into five typical behavior patterns based on the digital footprints of tourists visiting Ziwuyu of the Qinling Mountains, including 348 traveling tracks and 750 corresponding geotagged photographs: short-distance, traversing, reentrant, large loop, and small loop. Furthermore, each behavior pattern's recreation preference was identified using photograph analysis. Tourists with large-loop and reentrant behavior patterns have 89.8% and 30% chances of visiting Jianshanding, respectively. Key protected areas are faced with the risk of ecological environmental damage. Based on the behavior pattern differentiation and preference of tourists, this paper provides a decision-making basis for the classified management and guidance of tourists in ecotourism destinations. It has reference value for the management of similar ecotourism destinations.

Microbial‑induced carbonate precipitation (MICP) technology: a review on the fundamentals and engineering applications.

The microbial‑induced carbonate precipitation (MICP), as an emerging biomineralization technology mediated by specific bacteria, has been a popular research focus for scientists and engineers through the previous two decades as an interdisciplinary approach. It provides cutting-edge solutions for various engineering problems emerging in the context of frequent and intense human activities. This paper is aimed at reviewing the fundaments and engineering applications of the MICP technology through existing studies, covering realistic need in geotechnical engineering, construction materials, hydraulic engineering, geological engineering, and environmental engineering. It adds a new perspective on the feasibility and difficulty for field practice. Analysis and discussion within different parts are generally carried out based on specific considerations in each field. MICP may bring comprehensive improvement of static and dynamic characteristics of geomaterials, thus enhancing their bearing capacity and resisting liquefication. It helps produce eco-friendly and durable building materials. MICP is a promising and cost-efficient technology in preserving water resources and subsurface fluid leakage. Piping, internal erosion and surface erosion could also be addressed by this technology. MICP has been proved suitable for stabilizing soils and shows promise in dealing with problematic soils like bentonite and expansive soils. It is also envisaged that this technology may be used to mitigate against impacts of geological hazards such as liquefaction associated with earthquakes. Moreover, global environment issues including fugitive dust, contaminated soil and climate change problems are assumed to be palliated or even removed via the positive effects of this technology. Bioaugmentation, biostimulation, and enzymatic approach are three feasible paths for MICP. Decision makers should choose a compatible, efficient and economical way among them and develop an on-site solution based on engineering conditions. To further decrease the cost and energy consumption of the MICP technology, it is reasonable to make full use of industrial by-products or wastes and non-sterilized media. The prospective direction of this technology is to make construction more intelligent without human intervention, such as autogenous healing. To reach this destination, MICP could be coupled with other techniques like encapsulation and ductile fibers. MICP is undoubtfully a mainstream engineering technology for the future, while ecological balance, environmental impact and industrial applicability should still be cautiously treated in its real practice.

ENVIRONMENTAL HEALTH OFFICERS IN NIGERIA IN THE 21ST CENTURY: ADVOCACY AND RAISING PUBLIC AWARENESS

Healthy environment is important for the well-being of mankind and environmental factors play a crucial role in the spread of diseases, especially in the 21st century. Environmental health officers are stakeholders in this regard and in the sustainable development goals. This paper discussed the interplay between the environment and health, the importance of environmental officers in Nigeria and factors that influence their activities. A narrative review was carried out using secondary data from various databases and organizational websites. In Nigeria, an environmental health officer must be registered with the Environmental Health Officers Registration Council of Nigeria (EHORECON) in line with Act 11, of 2002 and requires investigative, analytical, communicative and educational skills, among others to function effectively. They are important stakeholders in environmental issues with roles in sanitary inspection of premises, prevention and control of diseases, disasters, antimicrobial resistance, food hygiene and safety, ecological health, planetary health and environmental impact assessment, among others. The challenges they face during their work include lack of enabling laws to deter defaulters, shortage of manpower, poor knowledge and access to various standardized tools, among others. The role of environmental health officers cannot be over-emphasized, especially in this 21st century. However, these professionals need to think outside the ‘box’ to address arising challenges.

Study on Ecological Restoration Technology of Mine Wasteland

Mining destroys the environment and occupies arable land, causing serious social problems. In recent decades, land reclamation and ecological restoration of mine wasteland have become a hot topic of interdisciplinary research. However, compared with developed countries in Europe and America, China's mine wasteland work has the characteristics of low land reclamation rate and poor reclamation quality. This paper discusses the soil reconstruction technology, physical and chemical improvement technology and vegetation restoration technology of land reclamation. At the same time, it is believed that the research on the ecological environment impact mechanism of mine wasteland should be strengthened. In the later stage, modern advanced technologies, such as 3S technology and information system technology, should be used to assess and supervise the reclamation work, and strive to achieve the technical breakthrough in the environmental damage mitigation of mine wasteland, and establish the theoretical system and technical specifications for the reclamation and ecological restoration of mine wasteland.

Study on Ecological Environmental Impact Assessment Index System of UHV AC Transmission and Transformation Engineering-A Case Study of 1000kv UHV Transmission and Transformation Engineering from Zhangbei to Xiongan

Ultra-high voltage (UHV) power grid is a new transmission and transformation technology, which has the advantages of large transmission capacity, long transmission distance, low line loss, saving land resources and obvious economic benefits. Taking the Zhangbei-xiongan 1000kv AC high voltage power transmission and transformation project as an example, this paper constructs the eco-environmental index system of the UHV transmission and transformation project by using the pressure-state-response model, and constructs a set of 18 indexes eco-environmental index system, it mainly includes three aspects: the eco-environmental pressure index caused by the construction behavior in different construction stages of power transmission and transformation projects, and the eco-environmental state index given by on-the-spot investigation and study of projects, based on the construction unit on the ecological environment impact management response measures given indicators. The index system provides a basis for comprehensive and systematic evaluation of the impact of power transmission and distribution projects on the ecological environment, and finally draws the corresponding project construction evaluation conclusions. In this paper, the eco-environmental impact assessment index system of power transmission and transformation engineering has certain universality, and it has certain reference and guiding significance for the ecological environment evaluation of power transmission and transformation engineering.

西南喀斯特地区耕地撂荒生态环境效应研究进展

PDF HTML阅读 XML下载 导出引用 引用提醒 西南喀斯特地区耕地撂荒生态环境效应研究进展 DOI: 10.5846/stxb202104050878 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目（42167044，42007054）；中国博士后科学基金项目（2020M673296）；贵州省研究生科研基金项目（黔教合YJSCXJH[2020]066） Research progress on the ecological environment effect of farmland abandonment in karst areas of Southwest China Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:耕地撂荒是多驱动力综合作用的结果，不同地域下的撂荒地生态环境影响具有其特殊性。针对当前西南喀斯特地区耕地撂荒现象，综述了目前在西南喀斯特地区撂荒地生态环境影响方面取得的研究进展及未来的研究展望。综合现有研究结果发现：①务农机会成本增加，以粗放经营为主要特点的隐性撂荒可能是现代石漠化发展的潜在动力；②喀斯特地区的土壤异质性决定了耕地撂荒后地块尺度的景观均质性或者区域尺度的景观异质性；③喀斯特地区耕地撂荒后植被恢复能在一定程度上改善土壤结构、维持土壤水分、促进土壤养分恢复；④撂荒初期土壤侵蚀加剧，撂荒后期植被恢复防治土壤侵蚀；⑤耕地撂荒植被恢复后增强了喀斯特地区植被碳汇、土壤碳汇和岩溶碳汇效应。未来，应明确隐性撂荒对喀斯特地区生态环境的具体影响，创新技术手段动态监测优等地和石漠化耕地的撂荒面积及趋势变化，定量显性撂荒在水土流失防治和石漠化生态恢复中的贡献，综合评估撂荒地的碳汇效应，从而为合理配置喀斯特地区耕地的社会、生态功能建言献策。 Abstract:Farmland abandonment is the result of comprehensive effects by multiple driving forces. Ecological environment impact by farmland abandonment has its particularity in different regions. Aiming at the current phenomenon of farmland abandonment in the southwest karst areas, this paper summarizes the current research progress and future research prospects on the ecological environment impact of farmland abandonment in karst areas of the southwest China. By summarizing existing studies on ecological and environmental effects by farmland abandonment, it revealed that:(1) the opportunity cost of farming increased. The implicit abandonment being mainly characterized by extensive management may be the potential driving force for modern development of rocky desertification; (2) The soil heterogeneity in the karst areas determines the landscape homogeneity at the plot scale or the landscape heterogeneity at the regional scale after a farmland abandoned; (3) Vegetation restoration after abandonment of farmland in karst areas can improve soil structure, maintain soil moisture and promote soil nutrient restoration to a certain extent; (4) Soil erosion intensifies in early stage of abandonment, and soil erosion will be prevented and controlled by restoration of vegetation in later stage of abandonment; (5) The restoration of vegetation on abandoned farmland enhances the effects of plant carbon sink, soil carbon sink and karst carbon sink in karst areas. In the future, the specific impact of implicit abandonment on ecological environment of karst areas should be clarified, innovative technical means should be used to dynamically monitor the abandoned area of prime farmland and rocky desertified farmland, as well as their abandonment trend changes, the contribution of explicit abandonment in soil erosion control and ecological restoration of rocky desertification should be quantified, and the carbon sink impact of abandoned land should be comprehensively assessed. Therefore, it may offer suggestions for the rational allocation of social and ecological functions of farmland in karst areas. 参考文献 相似文献 引证文献

Study on Ecological Environmental Impact Assessment of Saihanba Afforestation Project Based on Grey Target Model

With the help of the Chinese government, China's Saihanba Forest Farm has recovered from the desert and has now become an eco-friendly green farm with stable sand control function. After more than half a century of struggle, the largest artificial forest in the world was built in Saihanba. We expanded the afforestation of 1.12 million mu and planted more than 400 million trees. The builders created a green ocean on the plateau wasteland 400 kilometers north of Beijing. Therefore, through the data collection and analysis of Saihanba, this paper establishes the ecological environment impact assessment model of Saihanba based on the gray target model. According to the evaluation index and bull's eye value, using the data of plant abundance, plant coverage and total number of animals from 1966 to 2021, the environmental impact before and after the restoration of Saihanba is quantitatively analyzed by using the comprehensive index method.

Evaluation model and promotion based on the ecological characteristics of Saihanba

Saihanba Mechanical Forest Farm is an important sand source control project area in China. In order to promote the excellent case of Saihanba to other regions of the country and even the Asia-Pacific region, we have established a Saihanba ecological environmental impact model and ecological engineering construction assessment model, to provide suggestions for the establishment of ecological protection areas in China and even countries in the Asia-Pacific region. This paper determined the index of Saihanba ecological influence evaluation system using frequency analysis method and theoretical research method, determined the TOPSIS weight based on entropy weight method, to establish a complete ecological and environmental influence evaluation system. Subsequently, the paper introduced the data of relevant indicators around 1962 into the evaluation system, which got good scores, indicating that Saihanba has a great positive impact on the ecological environment. On the basis of problem 1, this paper had redefined the index and weight, established the index system based on the sandstorm background in Beijing, and brought the relevant data of Beijing in recent years into the model, and the establishment of Saihanba had played a relatively significant optimization effect on all the indicators of the sandstorm in Beijing. In view of problem 3, this article was first divided into 9 different ecological system service functional zones according to the National ecological function zoning (revised version) proposed by the Ministry of Environmental Protection and the Chinese Academy of Sciences. Meanwhile, based on the TOPSIS model, proposed a modified model based on DPSIR. The model fully omitted the impact of ecological, economic, policy and other factors on the construction of ecological protection areas .Meanwhile, multi-objective planning method based on genetic algorithm was used to solve the above problems to determine the best number and scale of ecological reserves in the region.

The impact modelling of urban and rural land planning and development on the ecological environment around the city

In order to effectively explore the impact of urban and rural land planning and development on the environment, there is a need to improve the research accuracy and environmental quality, and summarise the impact of urban and rural land planning and development on the periphery of the city. According to the results of impact analysis, the information of urban and rural land development intensity and the information of ecological environment around the city are counted. The global scheduling method is used to calculate the contribution of promoting factors, so as to construct the impact research model. The urban and rural land development intensity information and ecological environment information are input into the model, and the output of the model is the impact research result. The experimental results show that the accuracy of ecological environmental impact analysis around the city remains above 90% after the application of this method.

An ecological environment impact assessment of municipal solid waste based on grey prediction model

Aiming at the problem of low accuracy in the impact assessment of urban waste on ecological environment, a method of urban waste ecological environment impact assessment based on grey prediction model is proposed. First, the pollution type of urban waste is determined, and the important pollution data of urban waste is extracted with the help of the calculation of comprehensive water quality identification index. Then, the total ranking of pollution data is determined by the square root method, the judgement matrix is set to calculate the weight of pollution data, and the urban waste ecological environment pollution index system is constructed. Lastly, with the help of grey prediction model, the positive correlation between urban waste and ecological environment is determined, and the urban waste ecological environment impact assessment algorithm is designed to complete the impact assessment. The results show that the evaluation accuracy can be effectively improved by using the evaluation method in this paper.

Post-assessment of the eco-environmental impact of highway construction– A case study of Changbai Mountain Ring Road

The eco-environmental impact of highway construction is a long-term and cumulative process. Most of the existing studies pay attention to the environmental impact assessment technology of highway construction period and completion acceptance period, which can not fully explain the eco-environmental impact of highway operation period. At the same time, most of the previous studies have a single index and less consideration of the impact on species. Aiming at the highway located in the forest ecosystem in the middle temperate zone, considering the four aspects of species, land use, landscape pattern and ecological function, this paper establishes the post-evaluation index system of the eco-environmental impact of highway construction projects. This paper puts forward the quantitative assessment technology and spatio-temporal scale identification method of the long-term evolution of the impact of highway construction on the ecological environment, and uses the analytic hierarchy process to construct a comprehensive post-assessment system of ecological environmental impact of highway construction projects. Relying on the Changbai Mountain Ring Road, a 10-year comprehensive ecological impact assessment was carried out. Mammals tend to accumulate within 200 m of the road, and highway corridors attract bird activities; the animal mortality coverage rates of amphibians and reptiles are 100%, mammals 66.7%, and birds 50.9%. The utilization rate of bridges and culverts is 88% and 42%, and the total utilization rate is 49.3%. The landscape is changing to the dominant type of coniferous and broad-leaved mixed forest, with lower evenness, less diversity and higher degree of natural connection, but the ability of the ecological environment to resist external changes is reduced. The closer the landscape fragmentation is to the highway, the more serious it is, and the lower the diversity is. The time and space scale of post-assessment of eco-environmental impact of highway construction project is in the range of 4–7 years and 200-300 m on the road side, and with the increase of operation time, the change of ecosystem along the line decreases year by year and tends to be stable gradually. The research results can provide a method of reference for the follow-up study of highway ecological environment in mid-temperate forest ecological areas.

Evaluation of Economic Benefits and Ecological Environment Impact of Export Trade in Anhui Free Trade Zone

Nowadays, the scale of international trade is expanding at a great pace, leading to the development of the economy of different countries. Global industrialization and urbanization are developing with each passing day, and this fast economic expansion is putting a tremendous impact on the environment. Like the other countries, the scale of Chinese export trade is also increasing with time, resulting in the stable economy of our country. With the improvement of living standards, people are continuously demanding high environmental facilities. Further, the impact of trade (enterprises, companies, industries, etc.) on the ecological environment has become a worldwide problem because economic progress brought forth by trade expansion may directly affect the environment by causing pollution to rise or the degradation of natural resources. This indeed is a serious issue; therefore, various countries have started focusing on the impact of export trade on the ecological environment. In recent years, the issue of economic benefits and the environmental impact of export trade has become a hot topic of research. Therefore, this study focuses on the relationship between trade, economy, and environmental quality in China. For the accomplishment of our research study, we selected Anhui free trade zone (FTZ) as an example to analyze the interaction between the economic benefits of Anhui export trade and the local environment. It is among the top trading provinces in China having a faster economic development. In order to accurately study the economic benefits and environmental impact of export trade in the Anhui FTZ, this paper selects industrial waste gas, wastewater, and solid waste to establish an export trade environmental impact indicating system. After comparative analysis, three factors that include industrial soot (dust) emissions for export trade, chemical oxygen demand for trade, and general industrial solid waste dumping and discards are selected to evaluate the impact on the environment of the free trade zone. Based on this, the export trade environment vector autoregressive (VAR) model is established, and the variance decomposition method is used to analyze the dynamic impact of various factors on the environmental impact index. Further, we established an economic benefit VAR model based on the export economic benefit index (EI), export value (EV), and export product concentration (EPC) index and judged the economic benefit of the Anhui free trade zone based on the contribution rate of the obtained three factors. The experimental results show that the export volume and product concentration directly affect the economic benefits of the region, and at the same time, the expansion of export trade promotes the growth of economic benefits.