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Chủ đề : Environmental challenges


Có 20+ tài liệu thuộc chủ đề "Environmental challenges"

Urban neighbourhood environment assessment based on street view image processing: A review of research trends

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Urban neighbourhood environment assessment based on street view image processing: A review of research trends. Street view image Image recognition technology Urban neighbourhood environment. With the rapid development of image processing technology, street view images have become an emerging data source for urban research. Street view image processing can be used to obtain spatial elements of large scale urban neighborhoods,...

Assessment of ligninolytic bacterial consortium for the degradation of azo dye with electricity generation in a dual-chambered microbial fuel cell

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Microbial Fuel Cells (MFCs) serve a promising technology for renewable energy generation through the oxidation of biodegradable organic stuff in the presence of electro-genic bacteria. In the present study, the bacterial consortium WGC-D was investigated for its ability to produce electricity with the degradation of azo direct dye mixture. The bacterial consortium WGC-D was inoculated in the anode chamber and...

Assessment of urban thermal field variance index and defining the relationship between land cover and surface temperature in Chattogram city: A remote sensing and statistical approach

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The vulnerability of the SUHI effect can be described quantitatively and qualitatively by Urban Thermal Field Variance Index (UTFVI) phenomenon. The study investigates the changing pattern of the SUHI and its magnitude with Landsat TM/OLI time-series satellite imageries from 1988 to 2018 and establishes the relationship between LC change and LST variations in Chattogram city. The average LST of the...

Impact of flooding on the soil microbiota

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Impact of flooding on the soil microbiota. b College of the Sciences and Mathematics, West Chester University, PA 19382, USA. The ability of the microbiota present in agricultural soil to recover post-flooding is not known. In the current project, sandy loam and planting soil were flooded for various time points and after flooding, incubated for three weeks. The bacterial communities...

Geospatial modelling of changes in land use/land cover dynamics using Multi-layer perception Markov chain model in Rajshahi City, Bangladesh

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Rajshahi city in Bangladesh facing rapid urban expansion by replacing LU/LC such as vegetation cover, water bodies (natural resources) and bare land to urban settlements. This study aims to identify the LU/LC changing patterns of Rajshahi city for and 2020 and simulate future LU/LC changes for 2040. Multi-temporal cloud- free Landsat satellite images were used to estimate the LU/LC and...

Characterizing forest ecosystem services degradation within water catchments. An application to a South West Pacific tropical and semi-arid island (New Caledonia)

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New Caledonia is a tropical semi-arid archipelago in the Southwest Pacific. The degradation of the forest has led to loss of the following ecosystem services: soil stabilization, resilience to anthropogenic pressure, and water buffering. The main result is a synthetic geographical database of the water catchment perimeters indicating for each the loss of functions as regards the forest’s ecosystem services....

Bio-diesel production from airborne algae

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Airborne algae are spread in the environment by various local air movements. The post-monsoon season (i.e., the months of October, followed by November, September, December, and August) was the most favorable climate for the occurrence of airborne algal species from the Chlorophyta domain and was having a higher growth rate. Currently, biomass feedstock from forestry or crops, or agricul- tural...

Research on the impact of environmental risk perception and public participation on evaluation of local government environmental regulation implementation behavior

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Research on the impact of environmental risk perception and public. participation on evaluation of local government environmental regulation implementation behavior. Environmental Risk Perception Public Participation. Satisfaction of Environmental Governance Environmental Regulation Implementation Behavior. Based on the data from the Chinese General Social Survey in 2015 (CGSS2015),this paper studies the impact of environmental risk perception and public participation on the evaluation...

The influence of rainfall and soil-type distribution on uptake of small grains in semi-arid regions of Zimbabwe: A case of Mberengwa and Zvishavane districts

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The influence of rainfall and soil-type distribution on uptake of small grains in semi-arid regions of Zimbabwe: A case of Mberengwa and Zvishavane districts. Climate Resilience Small-grains Moisture-retention Uptake. The study assessed the influence of precipitation and soil-type distribution on uptake of small grains in Mberengwa and Zvishavane districts in Zimbabwe. Findings showed that soil type and precipitation distribution have...

A machine learning approach to monitoring and forecasting spatio-temporal dynamics of land cover in Cox’s Bazar district, Bangladesh from 2001 to 2019

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The overall accuracy of the classification is between 89.04% to 95.24%. Historical comparison of Land Use Land Cover (LULC) change in- dicates the interaction between the environment and humans in that region, which is very important for natural resources management and sustainable development ( Gillanders et al., 2008 . Remote sensing techniques in LULC classification significantly reduce the cost and...

Clean energy choice and use by the urban households in India: Implications for sustainable energy for all

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More than one-third of the global population depends on biomass, dung cake, and firewood for cooking fuel, which are harmful to health and the environment. To provide affordable and non-polluting fuel for all by 2030, as per the Sustainable Development Goals of the United Nations, it is vital to understand the factors that influence the adoption of non- polluting fuels....

Assessing pollution removal efficiencies of some selected parameters by applying different remediation techniques for petroleum oily sludge

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The petroleum industry and refineries, amid of their entire process and storage operation, fabricate a huge amount of oily sludge, bio-sludge, and chemical sludge ( Lingsheng et al., 2009. oil sludge emanates in oil storage tanks and refinery-wastewater treat- ment plants ( Shie et al., 2004. Management of solid waste, es- pecially oily sludge economically and technologically is a considerable...

Spatiotemporal variability of tropospheric NO2 over four megacities in Southern Africa: Implications for transboundary regional air pollution

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Nitrogen dioxide is a short-lived trace gas ( Marchenko et al., 2015 . Lamsal, 2020 ) that influences tropospheric ozone (O 3 ) levels partic- ularly within cities and other urban environments ( Krotkov et al., 2017 . Georgoulias et al., 2019 . He et al., 2019 . Otmani et al., 2020. Qin et al., 2020 ) which is a...

Local climate change signals and changes in climate extremes in a typical Sahel catchment: The case of Dano catchment, Burkina Faso

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This study investigated the changes in the climate and the spatiotemporal variations in climate extreme indices of the Dano catchment in Burkina Faso using historical data for the period 1981–2010 and projected for the period 2020–2049. Rainfall and temperature simulations from two RCMs under two Representative Concentration Pathways (RCP 4.5 and RCP 8.5) involved in the CORDEX-Africa project were used...

Ecosystem services valuation of homestead forests: A case study from Fatikchari, Bangladesh

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Ecosystem services valuation of homestead forests: A case study from Fatikchari, Bangladesh. Carbon sequestration Contingent valuation Homestead forests Likert scale Market valuation. Homestead forests (HF) have significant importance for its economic and ecological contribution. Miah et al., 2020 . Nath et al., 2015 . Roy et al., 2013 . Rahman et al., 2005. Homestead forests have been widely known as...

A proposed framework for economic valuation and assessment of damages cost to national wetlands ecosystem services using the benefit-transfer approach

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A proposed framework for economic valuation and assessment of damages cost to national wetlands ecosystem services using the benefit-transfer approach. Proposed framework Economic valuation Damages cost Ecosystem services Benefit transfer approach Wetlands. Estimating the cost of damage to ecosystem services can be effective in preventing further damage to wetland ecosystems. The study aims to propose a framework for estimating the...

Drought hot spot analysis using local indicators of spatial autocorrelation: An experience from Bangladesh

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Northern Bangladesh, consisting of 16 administrative districts, has suffered from several drought phenomena in the last few decades. Individual drought maps for each month within the specified period were first prepared and then superimposed in the ArcGIS platform to produce an integrated drought map. Analyses showed that around 65% of the study area faced moderate to severe meteorological drought and...

The integration of fatty acid biomarkers of trophic ecology with pollutant body-burdens of PAHs and PCBs in four species of fish from Sabine Lake, Texas

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alligator gars and bull sharks (mainly teleost diet). Elevated levels (45 × higher) of nervonic acid (24:1n9) also placed the trophic ecology of catfish and red drum closer to the base of the marine/estuarine food web of Sabine Lake, as compared to alligator gars and bull sharks. The multivariate correlational analysis of pollutant body-burdens and fatty acid levels showed no...

Analysis of emerging contaminants: A case study of the underground and drinking water samples in Chandigarh, India

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Analysis of emerging contaminants: A case study of the underground and drinking water samples in Chandigarh, India. drinking water of Chandigarh to analyse the health risk associated with the spread of emerging contaminants in the water sources. For the estimation of the emerging contaminants (Endosulphan (ES) and Hexachlorohexane (HCH)) in the water samples, an extraction procedure was carried out by...

Development of human health risk-based Soil Quality Standards for Turkey: Conceptual framework

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Because of the suc- cess achieved, the risk-based site management approaches have been in- cluded in the environmental policy of many countries ( NICOLE, 2002. FAO (2018) recently identified the soil pollution as one of the main threats affecting global soils and the ecosystem services provided by soils. As an important tool of con- taminated site management, the intended purpose...