Abstract
The city Ho Chi Minh (HCMC) is one of the largest cities in Vietnam with the most dramatically economic development rate. Along with the economic development, the urbanization process in this city is also taking place very fastly. Due to the rapid urbanization and development, the emission rate from the industry and transportation leads to the increase in the amount of carbon dioxide (CO2) which has been worsening the climate change. Protecting forests and conducting afforestation so that CO2is transformed to nutrition through photosynthetic conversion is one of the most effective ways to mitigate the effects of climate change. As a result, the accumulation of CO2emissions has become a global concern. Vegetation absorbs carbon dioxide, helps to conserve the environment, produces oxygen, reduces noise, and helps to stabilize subsurface water. This paper highlights the results of ENVI software which was used to interpret remote sensing images and Arcgis to evaluate the amount of carbon dioxide absorbed by vegetation in each administrative unit: district in HCMC and ward. According to the obtained results, the amount of CO2absorbed in urban districts “District 1”, “District 3”, “District 4”, “District 5”, “Phu Nhuan District” is immensely low due to the high population density in the center of city. The population is mainly concentrated in the center districts but land area for vegetation is low. Regarding the suburban area, with mangrove forests, Can Gio District has the highest amount of CO2absorbed of 35,894.075 tons/day and followed by Cu Chi District with 21,548.48 tons/day. It can be indicated that Can Gio and Cu Chi districts improtantly function like the greenhouse gas sinks for the whole HCMC. The success of this study could contribute to climate change mitigation and support in urban and land planning, as well as resettlement policies. Aside from that, CO2emission and absorption assessment and evaluation in large–scale cities like HCMC has become a crucial, urgent, and practical issue nowadays.
Highlights
This paper highlights the results of ENVI software which was used to interpret remote sensing images and Arcgis to evaluate the amount of carbon dioxide absorbed by vegetation in each administrative unit: district in HCMC and ward
Climate change according to the worst scenario of the Ministry of Natural Resources and Environment, many industrial zones will be seriously affected
We look at how much CO2 is absorbed by vegetation in HCMC, Vietnam, and how this can help to mitigate the effects of climate change by supporting urban planning, land use planning, and resettlement strategies
Summary
The impact of climate change on the agricultural production model in Ho Chi Minh City is that most of the agricultural land area is flooded and saline intrusion leads to a reduction in agricultural production. Price of applying GIS and remote sensing to create a hypothetical buffer zone with an area of 806,374 hectares capable of absorbing 9,106,650 tons of CO2, equivalent to 4,246% of greenhouse gas. The integration of GPS and GIS technology with remote sensing has shown to be an efficient tool for monitoring changes in vegetation and the ability of a specific region to absorb greenhouse gases. We look at how much CO2 is absorbed by vegetation in HCMC, Vietnam, and how this can help to mitigate the effects of climate change by supporting urban planning, land use planning, and resettlement strategies. One of the most important, pressing, and practical challenges today is the calculation and measurement of CO2 emissions and removals in major cities such as Ho Chi Minh City
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