Revista Internacional de Contaminación Ambiental
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Comportamientos de autoprotección frente a la contaminación del aire y factores psicosociales, Temuco, Chile
No full textThe medium cities of southern Chile suffer critical episodes every winter due to emission of large quantities of PM2.5 from wood-burning stoves and wood cookstoves. Policy makers have implemented atmospheric decontamination plans, which include awareness campaigns to promote self-protective behaviors such as wearing face masks or exercising only within walls. The objective of this study was to analyze the role of psychosocial factors in the adoption of self-protective behaviors against air pollution in residents of Temuco and Padre Las Casas. A non-experimental, cross-sectional and correlational-scope study was carried out, based on a non-probabilistic sample of 489 participants. Descriptive-comparative and correlation tests were performed, as well as ordinal logistic regression models. The results show that women, participants with previous respiratory illnesses, and those with higher education are more likely to protect themselves against pollution. These participants tend to be more aware of poor air quality and better perceive the severity of its effects. Although this study shows that psychosocial variables are relevant to understanding adherence to self-protective behaviors, each of these behaviors must be understood differently, since the determining factors vary in each of them.Las ciudades intermedias del sur de Chile sufren cada invierno episodios críticos por la emisión de grandes cantidades de MP2.5 procedentes de la combustión de estufas y cocinas a leña. Los responsables políticos han implementado planes de descontaminación atmosférica, que incluyen campañas de sensibilización para promover conductas autoprotectoras como el uso de mascarillas o realizar ejercicios sólo en intramuros. El objetivo de este estudio fue analizar el rol de los factores psicosociales en la adopción de conductas autoprotectoras frente a la contaminación del aire en residentes de Temuco y Padre Las Casas. Para ello, se llevó a cabo un estudio de diseño no experimental, transversal y de alcance correlacional, a partir de una muestra no aleatoria de 489 participantes. Se realizaron pruebas descriptivas-comparativas, de correlación, así como modelos de regresión logística ordinal. Los resultados muestran que las mujeres, los participantes con enfermedades respiratorias previas y quienes poseen estudios superiores son más propensos a autoprotegerse frente a la contaminación. Estos participantes tienden a ser más conscientes de la mala calidad del aire y perciben mejor la gravedad de sus efectos. Si bien este estudio muestra que las variables psicosociales son relevantes para comprender la adhesión a conductas de autoprotección, cada una de estas conductas debe entenderse de forma diferenciada, ya que los factores determinantes varían en cada una de ellas
Antagonism of Bacillus licheniformis M2–7 against phytopathogen fungi of Mangifera indica L.
Get PDFThe biological control using organisms that inhibit growth or the appearance of pests or diseases has proven to be a successful alternative for mango disease control. In this work, in vitro analyses were carried out with Bacillus licheniformis M2–7 and B. licheniformis LYA12 strain derived from M2–7 against the phytopathogenic fungi Aspergillus oryzae, Colletotrichum sp., and Aspergillus niger. Besides, the effect of bacteria on the micellar structure of phytopathogenic fungi was observed and evaluated through real-time PCR, the expression of two main metacaspases (casA and casB) that triggers the process of programmed cell death in fungi. The results obtained showed that both bacterial species inhibited by 45, 40, and 35 % the fungal growth of Aspergillus oryzae , Colletotrichum sp., and Aspergillus niger, respectively. The bacteria presence affected the mycelial appearance of the fungi because they presented fragmentation of the hyphae with intracellular inclusion bodies, swellings, malformations and scarce growth of the hyphae. The gene expression results conclude that the LYA12 and M2-7 strains against A. oryzae and A. niger have a fungicidal effect; therefore, the bacterial strains could be used in disease control in mango.The biological control using organisms that inhibit growth or the appearance of pests or diseases has proven to be a successful alternative for mango disease control. In this work, in vitro analyses were carried out with Bacillus licheniformis M2–7 and B. licheniformis LYA12 strain derived from M2–7 against the phytopathogenic fungi Aspergillus oryzae, Colletotrichum sp., and Aspergillus niger. Besides, the effect of bacteria on the micellar structure of phytopathogenic fungi was observed and evaluated through real-time PCR, the expression of two main metacaspases (casA and casB) that triggers the process of programmed cell death in fungi. The results obtained showed that both bacterial species inhibited by 45, 40, and 35 % the fungal growth of Aspergillus oryzae , Colletotrichum sp., and Aspergillus niger, respectively. The bacteria presence affected the mycelial appearance of the fungi because they presented fragmentation of the hyphae with intracellular inclusion bodies, swellings, malformations and scarce growth of the hyphae. The gene expression results conclude that the LYA12 and M2-7 strains against A. oryzae and A. niger have a fungicidal effect; therefore, the bacterial strains could be used in disease control in mango
Implementación de una celda solar fotocatalítica para la degradación de contaminantes emergentes de origen farmaceútico
Get PDFEmerging pollutants of pharmaceutical origin have a continuous entry into the aquatic environment in very low concentrations and can alter the organism of living beings. The main characteristics of these pollutants are their high stability and persistence in water, which can generate bioaccumulation, endocrine disruption, and bacterial resistance. These pollutants are excreted without metabolizing after their application, reaching wastewater and subsequently surface water because the methods used to eliminate them (biological treatments) are not efficient. A photocatalytic system is a great alternative to degrade emerging pollutants of pharmaceutical origin. Therefore, the implementation of a photocatalytic solar cell turns out to be a low-cost, efficient, and environmentally friendly solution. Acetylsalicylic acid, trimethoprim, and ranitidine were selected to simulate wastewater with emerging pollutants at a concentration of 1 g/L. They were subjected to a solar cell to carry out their degradation by photocatalysis, using TiO2 as a photocatalyst. The evaluation was carried out by analytical methods: UV-Vis spectrophotometry, chemical oxygen demand (COD) and total organic carbon (TOC). Acetylsalicylic acid was the drug that degraded the most, decreasing its COD from 152.6 to 10.4 mg/L at the end of treatment, while TOC started at 118.6 mg/L and ended at 1.4 mg/L. Trimethoprim turned out to be the drug with the least decrease in COD and TOC. Finally, it can be concluded that the coupling of solar energy to the photocatalysis process was satisfactory,, obtaining a technology of low cost and less impact.Los contaminantes emergentes de origen farmacéutico ingresan de manera continua al medio acuático en concentraciones muy bajas y pueden alterar el organismo de los seres vivos. Algunas de las principales características de estos contaminantes son su alta estabilidad y persistencia en el medio acuoso, lo que puede generar bioacumulación, disrupción endocrina y resistencia bacteriana. Estos contaminantes se excretan sin metabolizar después de su aplicación, llegando al agua residual y posteriormente al agua superficial debido a que los métodos empleados para eliminarlos (tratamientos biológicos) no son eficientes. Un sistema fotocatalítico representa una alternativa para degrader contaminantes emergentes de origen farmacéutico. Por ello, la implementación de una celda solar fotocatalítica resulta ser una solución de bajo costo, eficiente y amigable con el ambiente. Se seleccionó ácido acetilsalicílico, trimetoprima y ranitidina para similar agua residual con contaminantes emergentes a una concentración de 1 g/L. Los efluentes sintéticos fueron sometidos a la celda solar para realizar la degradación de los contaminantes mediante fotocatálisis, utilizando TiO2 como fotocatalizador. La evaluación se realizó mediante los métodos analíticos: espectrofotometría UV-Vis, demanda química de oxígeno (DQO) y carbono orgánico total (COT). El ácido acetilsalicílico fue el fármaco que tuvo mayor degradación, disminuyendo su DQO de 152.6 a 10.4 mg/L al final del tratamiento, mientras que el COT comenzó en 118.6 mg/L y finalizo en 1.4 mg/L. La trimetoprima resultó ser el fármaco con la menor disminución de DQO y COT. Por último, se puede concluir que el acoplamiento de la energía solar al proceso de fotocatálisis fue satisfactorio, obteniéndose una tecnología de bajo costo y de menor impacto
Estimación de la producción de sedimentos por prácticas de manejo de suelos en una cuenca transfronteriza
Get PDFThe Catamayo (in Ecuador) - Chira (in Peru) transboundary basin in its lower part has the Poechos multipurpose reservoir, which is essential for the economic and productive development of northern Peru. However, due to inadequate soil management in the basin, the reservoir is accumulating a high sediment load. The decision made by the reservoir administration was to raise its elevation, without considering working alongside farmers in the basin, proposing alternatives for sustainable soil management. In this context, the objective of this study was to estimate the sediment export by simulation soil management and conservation practices, using the sediment delivery ratio module (SDR) in the InVEST 3.9.0 software, to suggest adequate practices for the conditions of the soil watershed. Sediment export based on land use change over the last 30 years was also modeled. This study contributes as an instrument for the integrated water resources management (IWRM), which allows a balance between the users of the water resources (beneficiaries) and suppliers, who have their soils degraded. Thus, IWRM can go from being a simple intention, to a key tool to promote policies and international agreements, toward the generation of clean and abundant water for both countries. At the same time, it favors the management and conservation of the soil of the basin and its related resources, to maximize economic and social welfare in an equitable manner for both countries.La cuenca transfronteriza Catamayo (en Ecuador) - Chira (en Perú), en su parte baja cuenta con el reservorio multipropósito Poechos, fundamental para el desarrollo económico productivo del norte del Perú. Sin embargo, por un manejo inadecuado del suelo en la cuenca, la represa se está llenando de sedimentos. La decisión tomada por la administración del reservorio fue elevar su cota, sin considerar el trabajar a la par con los agricultores de la cuenca proponiéndoles alternativas para un manejo sostenible del suelo. En este contexto, el objetivo de este estudio fue estimar la producción de sedimentos simulando prácticas de manejo y conservación de suelos, usando el índice de entrega de sedimentos (SDR) en el software InVEST 3.9.0, para sugerir prácticas adecuadas con las condiciones de la cuenca. También fue modelada la producción de sedimentos generados por cambio de uso del suelo en los últimos 30 años. Este estudio aporta un instrumento para la gestión integrada de recursos hídricos (GIRH) que permita un balance entre los usuarios del recurso hídrico (beneficiarios) y los proveedores, quienes tienen degradados sus suelos degradados. Así, la GIRH puede pasar de ser una simple intención, a un proceso clave para promover políticas y acuerdos internacionales hacia la generación de agua limpia y abundante para ambos países. Al mismo tiempo que se favorece el manejo y la conservación del suelo de la cuenca y sus recursos relacionados, con el fin de maximizar el bienestar económico y social de manera equitativa para ambos países
El compromiso ambiental y social, los nuevos retos y las perspectivas de los ingenieros de ríos en Latinoamérica
Get PDFRiver engineering has provided the theoretical, empirical and practical elements to intervene in fluvial systems for the use of water resources or to reduce risk of damage to population and infrastructure. Hydraulic engineers specialized in river engineering have traditionally undertaken such interventions by means of so-called “hard engineering” solutions, due to the materials and constructive methods used, but also due to the underlying way of thinking, which favours intervention on apparent effects rather than on the real causes. Recent decades have seen a shift in the perception and the relation of our societies with the environment, promoting as fundamental values the good condition of aquatic ecosystems and a sustainable management of water resources. This paradigm shift implies a profound revision of the role of river engineers in planning, intervening and managing fluvial landscapes, assuming a change of direction in the approach to the interventions, as well as the need of a narrow collaboration with experts from different disciplines. In this work we discuss the new role of river engineers and the challenges they have to face in Latin-American societies. In particular, we emphasize the environmental and social singularity of the region, which requires new technical competences from river engineers, but also environmental and social commitment, as well as an active involvement as liaison between experts, society and authorities. La ingeniería de ríos ha proporcionado los elementos teóricos, empíricos y prácticos para intervenir en los cursos fluviales con la finalidad de aprovechar los recursos hídricos o de reducir los riesgos de daño a poblaciones e infraestructuras. Tradicionalmente, el ingeniero hidráulico con especialidad en ingeniería de ríos ha emprendido estas acciones mediante soluciones que se pueden denominar como “rígidas” o “duras”, por los materiales y las técnicas constructivas empleadas, pero también por la filosofía subyacente, que favorece las actuaciones sobre los efectos visibles, antes que sobre las causas. Sin embargo, en las últimas décadas nuestras sociedades han experimentado un cambio en su percepción y relación con el ambiente, el cual propugna como valores fundamentales el buen estado de los ecosistemas acuáticos y una gestión sostenible de los recursos hídricos. Este cambio de paradigma implica una profunda revisión del papel del ingeniero de ríos en la planificación, intervención y gestión de los espacios fluviales, asumiendo un giro sustancial en el enfoque de las actuaciones, así como la necesidad de colaboración estrecha con profesionales de diversas disciplinas. En este trabajo se discute el nuevo papel del ingeniero de ríos y los retos a los que ha de hacer frente en las sociedades latinoamericanas. En particular se hace énfasis en la singularidad ambiental y social de la región, que requiere del ingeniero de ríos nuevas competencias técnicas, pero también compromiso ambiental y social, así como una participación activa como enlace entre expertos de diversa índole, la sociedad y las autoridades
The collaboration in the action plan for a blue sky of Chinese municipal government based on text data mining and social network analysis
Get PDFConstructing a collaborative mechanism through the self-organizing movement within the system is the main development direction of China’s future mechanism of innovation. The reform of the administrative system can give full play to the role of the collaborative mechanism. This article comprehensively uses data mining and social network analysis to analyze the collaboration of China’s municipal departments in air pollution control. Text data includes 101 municipal policies. The paper reveals the collaboration problems in air pollution control and proposes suggestions from the perspective of the departmental responsibility. First, from the perspective of inter-departmental collaboration, the lack of responsibility for Department of Finance, Department of Housing and Urban-rural Development, Department of Ecology and Environment, Department of Industry and Information Technology, Department of Transport, Department of Public Security, and Department of Development and Reform is the most obvious, indicating that the comprehensive management departments should be strengthened to assume responsibilities, while the specialized management departments should also be strengthened. Second, from the perspective of intra-departmental responsibility collaboration, the most obvious situation is that the collaborations of responsible for promoting new-energy vehicles, air pollution control in autumn and winter, increasing tax-free incentive policy support, development of inter-modality, adjusting regional industrial layout, optimizing freight structure, and increasing economic policy support are insufficient. The number of departments responsible for supervision should be increased, as well as the number of departments responsible for guidance.Constructing a collaborative mechanism through the self-organizing movement within the system is the main development direction of China’s future mechanism of innovation. The reform of the administrative system can give full play to the role of the collaborative mechanism. This article comprehensively uses data mining and social network analysis to analyze the collaboration of China’s municipal departments in air pollution control. Text data includes 101 municipal policies. The paper reveals the collaboration problems in air pollution control and proposes suggestions from the perspective of the departmental responsibility. First, from the perspective of inter-departmental collaboration, the lack of responsibility for Department of Finance, Department of Housing and Urban-rural Development, Department of Ecology and Environment, Department of Industry and Information Technology, Department of Transport, Department of Public Security, and Department of Development and Reform is the most obvious, indicating that the comprehensive management departments should be strengthened to assume responsibilities, while the specialized management departments should also be strengthened. Second, from the perspective of intra-departmental responsibility collaboration, the most obvious situation is that the collaborations of responsible for promoting new-energy vehicles, air pollution control in autumn and winter, increasing tax-free incentive policy support, development of inter-modality, adjusting regional industrial layout, optimizing freight structure, and increasing economic policy support are insufficient. The number of departments responsible for supervision should be increased, as well as the number of departments responsible for guidance
Study on equivalent fracture toughness of recycled steel fiber-reinforced concrete based on digital image correlation technology
Get PDFRecycled steel fiber-reinforced concrete is a new hybrid high performance environmental protection composite material, which can be widely used in the construction industry and provide a new research direction for national green and sustainable development. In this study, three-point bending beams with a prefabricated incision were used to evaluate the fracture performance of plain concrete, steel fiber-reinforced concrete and recycled steel fiber-reinforced concrete with different fiber volume contents, fiber length-diameter ratios and relative incision depths based on digital image correlation technology. The results show that recycled steel fibers can improve the crack resistance of concrete beams better than ordinary steel fibers; The crack resistance of specimens increases with the increases of volume ratio of recycled steel fibers, and when the fiber content is from 0.0% to 1.0%, the increased amplitude of the crack resistance of specimens increases gradually, when the fiber content is from 0.5% to 1.0%, the increased amplitude of the crack resistance of specimens reaches the maximum, and when the fiber content is from 1.0% to 1.5%, the increased amplitude of the crack resistance of specimens decreases; The crack resistance of specimens increases with the increases of length-diameter ratio of recycled steel fibers, and when the fiber length-diameter ratio is from 30 to 50, the crack resistance of specimens increases relatively large, when the fiber length-diameter ratio is from 50 to 70, the crack resistance of specimens increases relatively small; The crack resistance of specimens decreases with the increases of relative incision depth of specimens, and when the relative incision depth is from 0.2 to 0.3, the crack resistance of specimens decreases relatively large, when the relative incision depth is from 0.3 to 0.4, the crack resistance of specimens decreases relatively small; The equivalent fracture toughness of concrete beams does not change with the changes in the relative incision depth. The simulated results correlated well with the experimental results, except some macroscopic phenomena during the cracking process. This study can provide references for the research of fracture behavior of steel fiber-reinforced concrete materials and the recycling of steel wire from waste tires.Recycled steel fiber-reinforced concrete is a new hybrid high performance environmental protection composite material, which can be widely used in the construction industry and provide a new research direction for national green and sustainable development. In this study, three-point bending beams with a prefabricated incision were used to evaluate the fracture performance of plain concrete, steel fiber-reinforced concrete and recycled steel fiber-reinforced concrete with different fiber volume contents, fiber length-diameter ratios and relative incision depths based on digital image correlation technology. The results show that recycled steel fibers can improve the crack resistance of concrete beams better than ordinary steel fibers; The crack resistance of specimens increases with the increases of volume ratio of recycled steel fibers, and when the fiber content is from 0.0% to 1.0%, the increased amplitude of the crack resistance of specimens increases gradually, when the fiber content is from 0.5% to 1.0%, the increased amplitude of the crack resistance of specimens reaches the maximum, and when the fiber content is from 1.0% to 1.5%, the increased amplitude of the crack resistance of specimens decreases; The crack resistance of specimens increases with the increases of length-diameter ratio of recycled steel fibers, and when the fiber length-diameter ratio is from 30 to 50, the crack resistance of specimens increases relatively large, when the fiber length-diameter ratio is from 50 to 70, the crack resistance of specimens increases relatively small; The crack resistance of specimens decreases with the increases of relative incision depth of specimens, and when the relative incision depth is from 0.2 to 0.3, the crack resistance of specimens decreases relatively large, when the relative incision depth is from 0.3 to 0.4, the crack resistance of specimens decreases relatively small; The equivalent fracture toughness of concrete beams does not change with the changes in the relative incision depth. The simulated results correlated well with the experimental results, except some macroscopic phenomena during the cracking process. This study can provide references for the research of fracture behavior of steel fiber-reinforced concrete materials and the recycling of steel wire from waste tires
Analysis of contributing factors to dissolved oxygen depletion in the anoxic zone and their respective contributions based on stratified hypolimnetic oxygen depletion
Get PDFHypolimnetic anoxia is often observed in large reservoirs during thermal stratification. In the hypolimnion layer, dissolved oxygen (DO) is continuously consumed by biological and chemical reactions, resulting in a stable anoxic zone at the bottom of the reservoir. The areal hypolimnetic oxygen depletion (AHOD) has been a widely used indicator for hypolimnetic DO depletion, but this indicator could not reflect the DO depletion process at the bottom of deep reservoirs with deposits of pollutant sediments. With Daheiting Reservoir as the study case, the concept of stratified areal hypolimnetic oxygen depletion (S-AHOD) was proposed, and an S-AHOD calculation model was built, which could accurately describe the DO depletion process in the anoxic zone at the bottom of Daheiting Reservoir, identify the DO depletion rate at different water depths in the anoxic zone and quantify the contribution of sediment oxygen demand to the overall oxygen depletion. It was found that sediment oxygen demand contributed considerably (41.4%) to the overall hypolimnetic DO depletion in the reservoir, DO depletion rate varied considerably at different water depths, which increased from the surface to the bottom of the reservoir and reached the maximum at the bottom layer. Finally, based on results of existing works, an AHOD calculation equation applicable to lakes and reservoirs with considerable deposits of heavily pollutant sediments was put forward. Hypolimnetic anoxia is often observed in large reservoirs during thermal stratification. In the hypolimnion layer, dissolved oxygen (DO) is continuously consumed by biological and chemical reactions, resulting in a stable anoxic zone at the bottom of the reservoir. The areal hypolimnetic oxygen depletion (AHOD) has been a widely used indicator for hypolimnetic DO depletion, but this indicator could not reflect the DO depletion process at the bottom of deep reservoirs with deposits of pollutant sediments. With Daheiting Reservoir as the study case, the concept of stratified areal hypolimnetic oxygen depletion (S-AHOD) was proposed, and an S-AHOD calculation model was built, which could accurately describe the DO depletion process in the anoxic zone at the bottom of Daheiting Reservoir, identify the DO depletion rate at different water depths in the anoxic zone and quantify the contribution of sediment oxygen demand to the overall oxygen depletion. It was found that sediment oxygen demand contributed considerably (41.4%) to the overall hypolimnetic DO depletion in the reservoir, DO depletion rate varied considerably at different water depths, which increased from the surface to the bottom of the reservoir and reached the maximum at the bottom layer. Finally, based on results of existing works, an AHOD calculation equation applicable to lakes and reservoirs with considerable deposits of heavily pollutant sediments was put forward
Comparison of methodolgies of soil quality indices (SQI) for sodic soil
Get PDFSoil degradation and the use of urban biosolid wastes to soil restoration have an economic, social-environmental and health impact. Therefore, there is interest worldwide in the use and comparison of methodologies to establish soil quality indexes (SQIs) based on physical, chemical, and biological indicators of soils. Considering that more than 60% of the territory in the Bajío region of Mexico in the State of Guanajuato is affected by some type of soil degradation, three methodologies for the establishment of SQIs—additive, weighted and unified weighted indexes—were compared in this study to evaluate the short-term effects—30 days—of the addition of biosolids as soil improvers. The methodologies were applied in experiments on carbon (C) and nitrogen (N) mineralization dynamics in a sodic agricultural soil. The ammonium indicator (N-NH4+) was established as the one that is most related to the quality of the soil. The additive and unified weighted indexes differentiated the level of soil quality with respect to time and treatment. The developed SQIs can be used for short-term assessment of the quality of agricultural soils under amendment addition treatments with biosolids or similar organic products.Soil degradation and the use of urban biosolid wastes to soil restoration have an economic, social-environmental and health impact. Therefore, there is interest worldwide in the use and comparison of methodologies to establish soil quality indexes (SQIs) based on physical, chemical, and biological indicators of soils. Considering that more than 60% of the territory in the Bajío region of Mexico in the State of Guanajuato is affected by some type of soil degradation, three methodologies for the establishment of SQIs—additive, weighted and unified weighted indexes—were compared in this study to evaluate the short-term effects—30 days—of the addition of biosolids as soil improvers. The methodologies were applied in experiments on carbon (C) and nitrogen (N) mineralization dynamics in a sodic agricultural soil. The ammonium indicator (N-NH4+) was established as the one that is most related to the quality of the soil. The additive and unified weighted indexes differentiated the level of soil quality with respect to time and treatment. The developed SQIs can be used for short-term assessment of the quality of agricultural soils under amendment addition treatments with biosolids or similar organic products
Environmental performance of urban integration regions of Chengdu, Deyang, Meishan and Ziyang, based on DPSIR model
Get PDFThe paper focuses on the quantitative assessment of the environmental performance of the Urban Integration region of Chengdu, Deyang, Meishan, and Ziyang (Chengdemeizi Urban Integration) in 2015-2019, including the overall level, changing trends of the environmental performance, and the key factors that influence the environmental performance. The theme framework and driver-force-pressure-state-impact-response (DPSIR) model is used to build the evaluation indicator system, the target approximation method and the combination weighting method are adopted to calculate the environmental performance index (EPI). In addition, the Pearson correlation analysis with GDP is performed to analyze the relationship between environmental performance and the economic development level of the Urban Integration region. The results indicated that regional average scores of comprehensive environmental performances show an obvious improvement trend and had significantly positive correlation with economic level from 2015 to 2019. For the EPIs of 2nd indicators, environmental quality is the main restrictive indicator. For the EPIs of 3rd indicators, air quality, noise, and environmental management are the main restrictive indicators. Each city has different performance, and the order of EPI scores of the four cities from largest to smallest is Chengdu > Deyang > Ziyang > Meishan. Therefore, the four cities need to continuously improve their respective shortcoming environmental performance indicators and promote the balanced improvement of indicators at all levels.The paper focuses on the quantitative assessment of the environmental performance of the Urban Integration region of Chengdu, Deyang, Meishan, and Ziyang (Chengdemeizi Urban Integration) in 2015-2019, including the overall level, changing trends of the environmental performance, and the key factors that influence the environmental performance. The theme framework and driver-force-pressure-state-impact-response (DPSIR) model is used to build the evaluation indicator system, the target approximation method and the combination weighting method are adopted to calculate the environmental performance index (EPI). In addition, the Pearson correlation analysis with GDP is performed to analyze the relationship between environmental performance and the economic development level of the Urban Integration region. The results indicated that regional average scores of comprehensive environmental performances show an obvious improvement trend and had significantly positive correlation with economic level from 2015 to 2019. For the EPIs of 2nd indicators, environmental quality is the main restrictive indicator. For the EPIs of 3rd indicators, air quality, noise, and environmental management are the main restrictive indicators. Each city has different performance, and the order of EPI scores of the four cities from largest to smallest is Chengdu > Deyang > Ziyang > Meishan. Therefore, the four cities need to continuously improve their respective shortcoming environmental performance indicators and promote the balanced improvement of indicators at all levels