Ngo Tho Hung - Academia.edu (original) (raw)
Papers by Ngo Tho Hung
Tạp chí Khoa học và Công nghệ Biển, 2014
Atmospheric Pollution Research
Vulnerability assessment plays a key role on mitigation and adaptation to climate change. It can ... more Vulnerability assessment plays a key role on mitigation and adaptation to climate change. It can be a tool for managers and policy makers to define the area or sector which is the most sensitive to climate change in order to make appropriate policy and management decisions. Vulnerability is defined as a function of 3 components: exposure, sensitivity and adaptive capacity. As such, a method which can synchronizethe dimension of these 3 components is required to formulate the vulnerability level. This article describes a dimension index method for climate change vulnerability assessment and the result of pilot application in agriculture sector in Ca Mau province, Vietnam.
In relation to air quality management (AQM), Integrated Monitoring and Assessment (IMA) is define... more In relation to air quality management (AQM), Integrated Monitoring and Assessment (IMA) is defined as a combined usage of measurements and model calculations. Integrated air quality monitoring is monitoring based on results from air quality measurements from fixed monitoring stations, and results obtained from calculations with air quality models. IMA combines data from both modeling and measurements to improve assessment of air quality. A PhD research has been conducted during 2007-2010 with the aim to evaluate air quality models developed in Denmark in the context of AQM in Vietnam with Hanoi as case study area. The Operational Street Pollution Model (OSPM) model was adapted to the traffic and vehicle emission conditions in Hanoi, and model results were compared to measurement campaigns at three streets where limited measurement data were available. The OSPM model was also used for inverse modeling to estimate average vehicle emission factors based on the air quality measurement d...
Sustainable Development, 2021
APN Science Bulletin, 2019
Ecosystem-based approach for planning research and capacity development for integrated coastal zo... more Ecosystem-based approach for planning research and capacity development for integrated coastal zone management in Southeast Asia Coastal ecosystems contribute significantly to socioeconomic development in the Southeast Asia Region. The emerging question is how to achieve sustainable development through innovative thinking, smart planning and better insights derived from an ecosystem-based approach (EbA). Based on experience gained while implementing the Sustainable Management and Governance of Coastal Ecosystems (ENGAGE) project funded by the Asia-Pacific Network for Global Change Research (APN), we contribute to addressing this question by proposing an emerging EbA as a complementary concept for implementing Integrated Coastal Zone Management (ICZM). A strong emphasis on strengthening the capacity of development actors and local communities remains pertinent in formulating this eco-centric policy for resource governance. This synthesis is described in three sections presenting an overview of EbA and ICZM in selected countries in the region. The first section reflects the review of coastal management frameworks and institutions, with a focus on policy strengths and gaps in the integration of EbA, particularly in the context of climate change adaptation. The second section explains different procedures adopted or proposed in the region for sustainable development of coastal ecosystems. The third section demonstrates how regional-scale initiatives like ENGAGE can facilitate the exchange of data, information, and knowledge, and stimulate cooperation for realizing the 2030 Agenda for Transformation, and the coastal zone-related SDGs and targets.
Atmospheric Environment, 2021
In many metropolitan areas, traffic is the main source of air pollution. The high concentrations ... more In many metropolitan areas, traffic is the main source of air pollution. The high concentrations of pollutants in streets have the potential to affect human health. Therefore, estimation of air pollution at the street level is required for health impact assessment. This task has been carried out in many developed countries by a combination of air quality measurements and modeling. This study focuses on how to apply a dispersion model to cities in the developing world, where model input data and data from air quality monitoring stations are limited or of varying quality. This research uses the operational street pollution model (OSPM) developed by the National Environmental Research Institute in Denmark for a case study in Hanoi, the capital of Vietnam. OSPM predictions from five streets were evaluated against air pollution measurements of nitrogen oxides (NO(x)), sulfur dioxide (SO2), carbon monoxide (CO), and benzene (BNZ) that were available from previous studies. Hourly measurements and passive sample measurements collected over 3-week periods were compared with model outputs, applying emission factors from previous studies. In addition, so-called "backward calculations" were performed to adapt the emission factors for Hanoi conditions. The average fleet emission factors estimated can be used for emission calculations at other streets in Hanoi and in other locations in Southeast Asia with similar vehicle types. This study also emphasizes the need to further eliminate uncertainties in input data for the street-scale air pollution modeling in Vietnam, namely by providing reliable emission factors and hourly air pollution measurements of high quality.
Pollution-induced community tolerance (PICT) constitutes a sensitive and ecologically relevant im... more Pollution-induced community tolerance (PICT) constitutes a sensitive and ecologically relevant impact parameter in ecotoxicology. We report the development and application of a novel anaerobic [(3) H]leucine incorporation assay and its comparison with the conventional aerobic [(3) H]leucine incorporation assay for PICT detection in soil bacterial communities. Selection of bacterial communities was performed over 42 d in bulk soil microcosms (no plants) and in rice (Oryza sativa) rhizosphere soil mesocosms. The following experimental treatments were imposed using a full factorial design: two soil types, two soil water regimes, and four Cu application rates (0, 30, 120, or 280 µg g(-1)). Bacterial communities in bulk soil microcosms exhibited similar Cu tolerance patterns when assessed by aerobic and anaerobic PICT assays, whereas aerobic microorganisms tended to be more strongly selected for Cu tolerance than anaerobic microorganisms in rhizosphere soil. Despite similar levels of water-extractable Cu, bacterial Cu tolerance was significantly higher in acid sulfate soil than in alluvial soil. Copper amendment selected for significant PICT development in soils subjected to alternate wetting and drying, but not in continuously flooded soils. Our results demonstrate that soil bacterial communities subjected to alternate wetting and drying may be more affected by Cu than bacterial communities subjected to continuous flooding. We conclude that the parallel use of anaerobic and aerobic [(3) H]leucine PICT assays constitutes a valuable improvement over existing procedures for PICT detection in irrigated soils and other redox gradient environments such as sediments and wetlands.
Tạp chí Khoa học và Công nghệ Biển, 2014
Atmospheric Pollution Research
Vulnerability assessment plays a key role on mitigation and adaptation to climate change. It can ... more Vulnerability assessment plays a key role on mitigation and adaptation to climate change. It can be a tool for managers and policy makers to define the area or sector which is the most sensitive to climate change in order to make appropriate policy and management decisions. Vulnerability is defined as a function of 3 components: exposure, sensitivity and adaptive capacity. As such, a method which can synchronizethe dimension of these 3 components is required to formulate the vulnerability level. This article describes a dimension index method for climate change vulnerability assessment and the result of pilot application in agriculture sector in Ca Mau province, Vietnam.
In relation to air quality management (AQM), Integrated Monitoring and Assessment (IMA) is define... more In relation to air quality management (AQM), Integrated Monitoring and Assessment (IMA) is defined as a combined usage of measurements and model calculations. Integrated air quality monitoring is monitoring based on results from air quality measurements from fixed monitoring stations, and results obtained from calculations with air quality models. IMA combines data from both modeling and measurements to improve assessment of air quality. A PhD research has been conducted during 2007-2010 with the aim to evaluate air quality models developed in Denmark in the context of AQM in Vietnam with Hanoi as case study area. The Operational Street Pollution Model (OSPM) model was adapted to the traffic and vehicle emission conditions in Hanoi, and model results were compared to measurement campaigns at three streets where limited measurement data were available. The OSPM model was also used for inverse modeling to estimate average vehicle emission factors based on the air quality measurement d...
Sustainable Development, 2021
APN Science Bulletin, 2019
Ecosystem-based approach for planning research and capacity development for integrated coastal zo... more Ecosystem-based approach for planning research and capacity development for integrated coastal zone management in Southeast Asia Coastal ecosystems contribute significantly to socioeconomic development in the Southeast Asia Region. The emerging question is how to achieve sustainable development through innovative thinking, smart planning and better insights derived from an ecosystem-based approach (EbA). Based on experience gained while implementing the Sustainable Management and Governance of Coastal Ecosystems (ENGAGE) project funded by the Asia-Pacific Network for Global Change Research (APN), we contribute to addressing this question by proposing an emerging EbA as a complementary concept for implementing Integrated Coastal Zone Management (ICZM). A strong emphasis on strengthening the capacity of development actors and local communities remains pertinent in formulating this eco-centric policy for resource governance. This synthesis is described in three sections presenting an overview of EbA and ICZM in selected countries in the region. The first section reflects the review of coastal management frameworks and institutions, with a focus on policy strengths and gaps in the integration of EbA, particularly in the context of climate change adaptation. The second section explains different procedures adopted or proposed in the region for sustainable development of coastal ecosystems. The third section demonstrates how regional-scale initiatives like ENGAGE can facilitate the exchange of data, information, and knowledge, and stimulate cooperation for realizing the 2030 Agenda for Transformation, and the coastal zone-related SDGs and targets.
Atmospheric Environment, 2021
In many metropolitan areas, traffic is the main source of air pollution. The high concentrations ... more In many metropolitan areas, traffic is the main source of air pollution. The high concentrations of pollutants in streets have the potential to affect human health. Therefore, estimation of air pollution at the street level is required for health impact assessment. This task has been carried out in many developed countries by a combination of air quality measurements and modeling. This study focuses on how to apply a dispersion model to cities in the developing world, where model input data and data from air quality monitoring stations are limited or of varying quality. This research uses the operational street pollution model (OSPM) developed by the National Environmental Research Institute in Denmark for a case study in Hanoi, the capital of Vietnam. OSPM predictions from five streets were evaluated against air pollution measurements of nitrogen oxides (NO(x)), sulfur dioxide (SO2), carbon monoxide (CO), and benzene (BNZ) that were available from previous studies. Hourly measurements and passive sample measurements collected over 3-week periods were compared with model outputs, applying emission factors from previous studies. In addition, so-called "backward calculations" were performed to adapt the emission factors for Hanoi conditions. The average fleet emission factors estimated can be used for emission calculations at other streets in Hanoi and in other locations in Southeast Asia with similar vehicle types. This study also emphasizes the need to further eliminate uncertainties in input data for the street-scale air pollution modeling in Vietnam, namely by providing reliable emission factors and hourly air pollution measurements of high quality.
Pollution-induced community tolerance (PICT) constitutes a sensitive and ecologically relevant im... more Pollution-induced community tolerance (PICT) constitutes a sensitive and ecologically relevant impact parameter in ecotoxicology. We report the development and application of a novel anaerobic [(3) H]leucine incorporation assay and its comparison with the conventional aerobic [(3) H]leucine incorporation assay for PICT detection in soil bacterial communities. Selection of bacterial communities was performed over 42 d in bulk soil microcosms (no plants) and in rice (Oryza sativa) rhizosphere soil mesocosms. The following experimental treatments were imposed using a full factorial design: two soil types, two soil water regimes, and four Cu application rates (0, 30, 120, or 280 µg g(-1)). Bacterial communities in bulk soil microcosms exhibited similar Cu tolerance patterns when assessed by aerobic and anaerobic PICT assays, whereas aerobic microorganisms tended to be more strongly selected for Cu tolerance than anaerobic microorganisms in rhizosphere soil. Despite similar levels of water-extractable Cu, bacterial Cu tolerance was significantly higher in acid sulfate soil than in alluvial soil. Copper amendment selected for significant PICT development in soils subjected to alternate wetting and drying, but not in continuously flooded soils. Our results demonstrate that soil bacterial communities subjected to alternate wetting and drying may be more affected by Cu than bacterial communities subjected to continuous flooding. We conclude that the parallel use of anaerobic and aerobic [(3) H]leucine PICT assays constitutes a valuable improvement over existing procedures for PICT detection in irrigated soils and other redox gradient environments such as sediments and wetlands.