Effects of rapid urbanisation on the urban thermal environment between 1990 and 2011 in Dhaka Megacity, Bangladesh

Trotter, Lewis; Dewan, Ashraf; Robinson, Todd

doi:10.3934/environsci.2017.1.145

Cited by 41 publications

(28 citation statements)

References 61 publications

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“…This process is similar that which has occurred in Ho Chi Minh [2], Dhaka [1,[3][4][5][6]10], Delhi [7], Hanoi [8] and Ansan [9]. Numerous bare land areas emerging along with urbanization processes have cast irreversible impacts on the urban environment, such as air pollution and soil loss [51][52][53][54][55][56][57].…”

Section: Analyses On Urbanization Of Wuhanmentioning

confidence: 80%

“…Urbanization process of the city was monitored and analyzed from the maps, since urban growth is crucial for local environmental and ecological management. The city of Wuhan has undergone one of the most rapid economic, industrial and urban development in its history, similar to other cities in China, India, Bangladesh, Vietnam and other developing counties [1][2][3][4][5][6][7][8][9][10][51][52][53][54][55][56][57]. The study revealed that the urban expansion in Wuhan has been rapid, with the majority of built-up and bare land acquired by converting areas that were previously agricultural land, forest and water bodies.…”

Section: Analyses On Urbanization Of Wuhanmentioning

confidence: 99%

“…In developing countries, urban expansion is often rapid and unplanned, which can lead to unintended and detrimental consequences [1][2][3][4][5][6][7][8][9][10]. Cities are often located on the most productive agricultural lands, so any expansion of built-up areas quickly consumes natural resources, compromising not only food production, but also the provision of ecosystem goods and services that are derived from these landscapes.…”

Section: Urbanization In Developing Countriesmentioning

confidence: 99%

“…Remote-sensing is a powerful and cost-effective data source for assessing the spatial and temporal dynamics of LULC [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Digital archives of remotely sensed data provide an excellent opportunity to study historical land use/cover changes and to relate their spatio-temporal patterns to environmental and human factors.…”

Section: Remote-sensing For Analyzing Lulc Changementioning

confidence: 99%

“…Furthermore, urbanization often leads to the destruction of local environment, particularly in developing countries. The negative impact of urbanization on the environment include increasing vulnerability to natural hazards, channel-bank and road-surface erosion, habitat destruction, landscape degradation and fragmentation, climate change, species extinction as well as the reduction of net primary productivity [1][2][3][4][5][6][7][8][9][10].…”

Section: Urbanization In Developing Countriesmentioning

confidence: 99%

See 4 more Smart Citations

Mapping Typical Urban LULC from Landsat Imagery without Training Samples or Self-Defined Parameters

Wang

Zhong

et al. 2017

Remote Sensing

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Abstract:Land use/land cover (LULC) change is one of the most important indicators in understanding the interactions between humans and the environment. Traditionally, when LULC maps are produced yearly, most existing remote-sensing methods have to collect ground reference data annually, as the classifiers have to be trained individually in each corresponding year. This study presented a novel strategy to map LULC classes without training samples or assigning parameters. First of all, several novel indices were carefully selected from the index pool, which were able to highlight certain LULC very well. Following this, a common unsupervised classifier was employed to extract the LULC from the associated index image without assigning thresholds. Finally, a supervised classification was implemented with samples automatically collected from the unsupervised classification outputs. Results illustrated that the proposed method could achieve satisfactory performance, reaching similar accuracies to traditional approaches. Findings of this study demonstrate that the proposed strategy is a simple and effective alternative to mapping urban LULC. With the proposed strategy, the budget and time required for remote-sensing data processing could be reduced dramatically.

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Section: Analyses On Urbanization Of Wuhanmentioning

confidence: 80%

Section: Analyses On Urbanization Of Wuhanmentioning

confidence: 99%

Section: Urbanization In Developing Countriesmentioning

confidence: 99%

Section: Remote-sensing For Analyzing Lulc Changementioning

confidence: 99%

Section: Urbanization In Developing Countriesmentioning

confidence: 99%

See 3 more Smart Citations

Mapping Typical Urban LULC from Landsat Imagery without Training Samples or Self-Defined Parameters

Wang

Zhong

et al. 2017

Remote Sensing

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Exploring the Spatio-temporal Patterns and Driving Forces of Urban Growth in Dhaka Megacity from 1990 to 2020

Rashid

Akter

Kayes³

et al. 2023

Springer Geography

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Changes in urbanization and urban heat island effect in Dhaka city

Uddin

Khan

Islam

et al. 2021

Theor Appl Climatol

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Urbanization changes the local environment, resulting in urban heat island (UHI) effect and deteriorating human life quality. Knowledge of urban environments and temperature changes is important to outline the urban planning process for mitigation of UHI effect. The study aimed to assess the changes in urban areas and UHI effects in Dhaka city, Bangladesh from 2001to 2017, using Moderate Resolution Imaging Spectroradiometer (MODIS) daily day-and nighttime land surface temperature (LST) data from 2001to 2017. The expansion of the city was calculated using the city clustering algorithm (CCA). The temperature of the identified urbanized area was analyzed and compared with the adjacent regions. The changes in urban temperature were estimated using non-parametric statistical methods. The results showed that the Dhaka city area has grown by 19.12% and its inhabitants by 76.65% during 2001-2017. Urban expansion and dense settlements caused an increase in average temperature in some areas of Dhaka city nearly 3C compared to that at its boundary. The day and night temperatures at Dhaka city's warmest location were nearly 7 and 5ºC, respectively, more than the coolest point outside the city. The city's annual average day-and nighttime temperature was increasing at a rate of 0.03 and 0.023C/year over the period 2001-2017. The rising temperature would increase the UHI effect in the future, which combined with high humidity, may cause a significant increase in public health risk in the city if mitigation practices are not followed.

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Effects of rapid urbanisation on the urban thermal environment between 1990 and 2011 in Dhaka Megacity, Bangladesh

Cited by 41 publications

References 61 publications

Mapping Typical Urban LULC from Landsat Imagery without Training Samples or Self-Defined Parameters

Mapping Typical Urban LULC from Landsat Imagery without Training Samples or Self-Defined Parameters

Exploring the Spatio-temporal Patterns and Driving Forces of Urban Growth in Dhaka Megacity from 1990 to 2020

Changes in urbanization and urban heat island effect in Dhaka city

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