Polish Journal of Environmental Studies最新文献_第7页

Hydrodynamic Behavior Simulation of Flow Performance over Labyrinth Side Weir 迷宫侧堰水流性能的水动力行为模拟

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-30 DOI: 10.15244/pjoes/173442

B. Hussein, S. Jalil

{"title":"Hydrodynamic Behavior Simulation of Flow Performance over Labyrinth Side Weir","authors":"B. Hussein, S. Jalil","doi":"10.15244/pjoes/173442","DOIUrl":"https://doi.org/10.15244/pjoes/173442","url":null,"abstract":"Side weir is an effective control in streams. To study geometrical dimensions effect of the weir on the generated flow structure, here, experimental and numerical simulation analysis of the previous and present experimental studies was done on the flow around different geometric types of side weir. A triangular labyrinth side weir with three distinct included angles ( θ = 30 o , 45 o , and 60°) and three weir heights (P = 10, 15 and 20 cm) has been tested, in addition normal rectangular side weir for comparison. The volume of fluid (VOF) approach was used for tracking free-surface subcritical flow conditions at the centerline of the main channel and near side weir banks. Accurate results were discovered by employing the Renormalization Group (RNG k-∈ ) turbulence model with the experimental outcomes. The smallest inclusion angle of side weir, generates smaller width of vortices zone near the upstream side weir wall which obstacles only a smaller length of crest as compared to the larger inclusion angle that hindrances larger length of this side for flowing water. In addition the contribution portion of the surface flow for the smallest inclusion angle which is indicated by streamlines is about 0.66 times the main channel width. Moreover, the maximum width of separation zone at the downstream of the main channel reached to 0.8 times the width of the main channel for the triangular labyrinth side weir. The stagnation point exists at the downstream end of side weir results the increase of surface elevation to reach maximum level. The coefficient of discharge of such weirs were 3.8, 2.7 and 2.12 times the coefficient of the normal rectangular side weir for θ = 30 o , 45 o and 60°, respectively.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"842 ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139204933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reckonings of Environmental Efficiency and Convergence in Asian-Pacific Region: A Malmquist- Luenberger Approach 亚太地区环境效率与趋同的计算：马尔奎斯特-卢恩贝格尔方法

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-30 DOI: 10.15244/pjoes/166597

A. Jadoon, M. Javaid, Ambreen Sarwar, S. A. Batool, Sarvjeet Kaur Chatrath, Saima Liaqat, Bushra Pervaiz

{"title":"Reckonings of Environmental Efficiency and Convergence in Asian-Pacific Region: A Malmquist- Luenberger Approach","authors":"A. Jadoon, M. Javaid, Ambreen Sarwar, S. A. Batool, Sarvjeet Kaur Chatrath, Saima Liaqat, Bushra Pervaiz","doi":"10.15244/pjoes/166597","DOIUrl":"https://doi.org/10.15244/pjoes/166597","url":null,"abstract":"The second wave of industrialization at the end of the last century brought the attention of researchers to the effect of more energy usage and its effects on environmental degradation. It was also highlighted in the 2030 agenda for sustainable development goals (2015) that environmental degradation threatens humans’ well-being unless countries use environment-friendly production processes. The present study has used the Malmquist-Luenberger Index (MLI) to estimate the environmental efficiency of the Asia-Pacific (APAC) region for the period 1990 to 2019. The estimated results showed that the environmental efficiency of APAC countries declined by 0.36%, on average, in the studied period. The results also highlighted that the Republic of Korea has the highest total factor productivity (TFP) output growth rate in the APAC region. In contrast, Lao People’s DR and the Maldives have the lowest TFP. Conditional, unconditional, and Club convergence tests are also tested for the APAC region. The results also suggested that convergence in environmental efficiency is conditional on trade openness, industrial growth, and energy prices. Some policies are also suggested for the APAC region at the end of the study.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139200744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Farmers’ Low-Carbon Production Behavior: Introducing Green Cognition into the Theory of Planned Behavior 农民低碳生产行为研究：将绿色认知引入计划行为理论

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-30 DOI: 10.15244/pjoes/172041

Haiqing Wang, Long Zhang

{"title":"Research on Farmers’ Low-Carbon Production Behavior: Introducing Green Cognition into the Theory of Planned Behavior","authors":"Haiqing Wang, Long Zhang","doi":"10.15244/pjoes/172041","DOIUrl":"https://doi.org/10.15244/pjoes/172041","url":null,"abstract":"Low-carbon production has great potential to limit greenhouse gas emissions and protect the living environment. This research innovatively introduces green cognition into the theory of planned behavior (TPB) to validate the effect of green cognition on farmers’ low-carbon production behavior. In this research, we use structural equation model (SEM) to research the low-carbon production behavior of 265 farmers in Yilan County, Harbin City, China. Our results indicate that farmers’ perceived behavioral control (PBC) has a remarkable impact in generating their low-carbon production intention, while attitude (ATT) and subjective norms (SN) have no significant positive impact. Meanwhile, it is verified that the perceived behavioral control and behavioral intention (INT) of farmers have a significant positive impact on their low-carbon production behavior. In addition, the research also verifies that green cognition (GC) has a significant positive impact on farmers’ attitudes and subjective norms of low-carbon production behavior, and green cognition may indirectly affect low-carbon production behavior through farmers’ subjective norms and intention pathways, reflecting that the extended theoretical framework of planned behavior is applicable to the research of farmers’ low-carbon production behavior.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"31 7","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139206209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing the Effect of Resolution on Species Distribution Models Using Two Invasive Species 利用两种入侵物种测试分辨率对物种分布模型的影响

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-30 DOI: 10.15244/pjoes/166353

Serkan Özdemir

{"title":"Testing the Effect of Resolution on Species Distribution Models Using Two Invasive Species","authors":"Serkan Özdemir","doi":"10.15244/pjoes/166353","DOIUrl":"https://doi.org/10.15244/pjoes/166353","url":null,"abstract":"Species distribution models are the most useful tools that reveal the relationships of target species with environmental variables. The most frequently preferred environmental variables are bioclimatic parameters due to their ability to be interpolated into the future. Bioclimatic variables can be downloaded from various databases at different resolutions. The aim of the present study is to reveal the effect of resolution preference on species distribution models. Ambrosia artemisiifolia and Ailanthus altissima , two invasive species, were selected as target species. These species have large potential distributions. In addition, studies indicate that their distribution is increasing rapidly. Therefore, it poses a threat to both human health and biodiversity. In the present study, a significant difference was found between the predictive values obtained with different resolutions for both species. It was also observed that the model with the highest AUC values was obtained with bioclimatic variables that have 10 arc minutes resolution for both species. The AUC values showed that the models had excellent explanatory power. Finally, potential suitable areas covering almost all of Europe were identified for the two invasive species. It is thought that these species may pose a serious threat in terms of both biodiversity and human health if careful attention is not exercised in the planning.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"16 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139205495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Climate Forecasting: Variational Mode Decomposition and Convolutional Neural Network with Long-Term Short Memory 混合气候预测：变分模式分解和具有长期短时记忆的卷积神经网络

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-27 DOI: 10.15244/pjoes/172756

Huimin Han, S. Bazai, M. Bhatti, Abdul Basit, Abdul Wahid, U. Bhatti, Y. Ghadi, Abdulmohsen Algarni

引用次数: 0

Evaluation of Ecological Efficiency of Water Resources: A Case Study in Henan Province 水资源生态效益评价：河南省案例研究

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-27 DOI: 10.15244/pjoes/173120

Wenquan Xie, Bingqian Sun, Yonghui Hu, Yiyan Liu, Xueyao Ma, Yanbo Liang, Huimin Zhai

引用次数: 0

Comparative Analyses of Carbon Footprints and Economic Benefits: Rice-Shrimp Co-Cropping, Rice-Crab Co-Cropping and Rice Monoculture Models 碳足迹和经济效益比较分析：稻虾共作、稻蟹共作和水稻单作模式

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-27 DOI: 10.15244/pjoes/173094

Mei Yang, Lingyun Shao, Jin Chu, Zhiqiang Li, Chunhui Tian, Fuyu Sun, F. Yu

{"title":"Comparative Analyses of Carbon Footprints and Economic Benefits: Rice-Shrimp Co-Cropping, Rice-Crab Co-Cropping and Rice Monoculture Models","authors":"Mei Yang, Lingyun Shao, Jin Chu, Zhiqiang Li, Chunhui Tian, Fuyu Sun, F. Yu","doi":"10.15244/pjoes/173094","DOIUrl":"https://doi.org/10.15244/pjoes/173094","url":null,"abstract":"An objective and complete assessment of the carbon footprint of rice-fishery co-cropping model is critical for the rice-farming industry’s low-carbon and green growth. Based on field experiments and the life cycle assessment (LCA) methodology, a comprehensive carbon footprint assessment of rice monoculture, rice-shrimp co-cropping, and rice-crab co-cropping models was conducted in this study, and the NEEB of different rice farming models was calculated based on the economic benefits. The carbon footprints per unit area of rice monoculture, rice-shrimp co-cropping, and rice-crab co-cropping models were 14122.65 kg (CO 2 -eq)·hm -2 , 13791.78 kg (CO 2 -eq)·hm -2 , and 15617.13 kg (CO 2 -eq)·hm -2 , respectively, according to the data. Hotspot analysis revealed that the carbon footprint composition of the rice-shrimp and rice-crab co-cropping models was influenced more by CH 4 emissions, energy use, and feed inputs. Due to the greater economic production values of rice-shrimp and rice-crab co-cropping modes, the NEEB of these two modes increased by 81.45% and 69.52%, respectively, as compared to rice monoculture. Overall, rice-shrimp and rice-crab co-cropping models can reduce emissions and improve paddy field efficiency to some extent when compared to rice monoculture and rice-crab co-cropping models, but attention should be paid to the point of trade-off between carbon footprints and economic benefits in order to promote the green and efficient development of the rice-fishery co-cropping model. The technique utilized in this work can give technical assistance for a more thorough carbon footprint assessment of multifunctional agricultural production systems.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"31 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139228687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Reaction of Maize and Sorghum to Fertilization with Granulated Fertilizer Obtained from Digestate 玉米和高粱对沼渣颗粒肥施肥的反应

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-27 DOI: 10.15244/pjoes/172049

L. Kordas, A. Lejman, P. Kuc, Józef Szlachta, M. Fugol, Hubert Prask

引用次数: 0

Perceptions of Social Responsibility, Resource Integration Ability and Sustainable Development of Family Grain Farms – Evidence from China 家庭农场的社会责任感、资源整合能力与可持续发展--来自中国的证据

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-25 DOI: 10.15244/pjoes/173444

Wei Duan, Guangqiang Luo

{"title":"Perceptions of Social Responsibility, Resource Integration Ability and Sustainable Development of Family Grain Farms – Evidence from China","authors":"Wei Duan, Guangqiang Luo","doi":"10.15244/pjoes/173444","DOIUrl":"https://doi.org/10.15244/pjoes/173444","url":null,"abstract":"The purpose of this paper is to analyze the influencing factors of sustainable development of family grain farms in China. According to related investigation, there is a real problem of lack of social responsibility of grain family farms in China, which restricts their sustainable development. Therefore, based on a sample of 301 family grain farms in China, this paper used multi-classification ordered logit model and mediation effect model to investigate the relationship between perceptions of social responsibility, resource integration ability, and sustainable development of family grain farms. Various studies show that stronger perceptions of social responsibility related to more sustainable development; greater resource integration ability related to more sustainable development; and resource integration ability mediated the relationships between perceptions of social responsibility and sustainable development. Conclusions suggest that improving perceptions of social responsibility, increasing support for improving resource integration ability and giving full play to the mediating role of resource integration ability is needed to bolster the sustainable development of family grain farms.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"11 11","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilization of Fermented Sago Pulp and Effect on the Performance of Broiler Ducks 发酵西米浆的利用及其对肉鸭生产性能的影响

IF 1.8 4区环境科学与生态学

Polish Journal of Environmental Studies Pub Date : 2023-11-24 DOI: 10.15244/pjoes/173445

A. Allaily, Samadi Samadi, Muhammad Daud, Tania Aprilia, Emenda Ninta Dwina, Z. Zulfan, M. A. Yaman, M. N. Rofiq

{"title":"Utilization of Fermented Sago Pulp and Effect on the Performance of Broiler Ducks","authors":"A. Allaily, Samadi Samadi, Muhammad Daud, Tania Aprilia, Emenda Ninta Dwina, Z. Zulfan, M. A. Yaman, M. N. Rofiq","doi":"10.15244/pjoes/173445","DOIUrl":"https://doi.org/10.15244/pjoes/173445","url":null,"abstract":"The purpose of this study was to evaluate the performance of broiler ducks fed ration based on fermented sago pulp using 96 of day old ducks (DOD). The treatment were T0 = 100% commercial ration, T1 10% fermented sago dregs; T2 20% fermented sago pulp, T3 = 30% fermented sago pulp. The design used was a completely randomized design (CRD) consisting of 4 treatments, each treatment was given 4 replications and consisting of 6 DOD. Application of sago pulp for 8 weeks, including 1 week as a pretreatment for adaptation. The results showed that the fermented sago dregs did not have a significant effect (P>0.05) on the average feed consumption and feed conversion of broiler ducks, but had a significant effect (P<0.05) on the average final body weight and weight gain. Histological observations of the intestinal villi showed that fermented sago pulp changed the structure of the villi. Statistical results showed that the width, height, and intestinal surface area of the intestinal villi had a smaller significant effect on each treatment than control. Based on the results of the research, it can be concluded that fermented sago pulp significantly reduced the characteristics and histology of the duck intestine.","PeriodicalId":20363,"journal":{"name":"Polish Journal of Environmental Studies","volume":"10 20","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0