Spatial-temporal analysis of urban eco-environmental quality of an urban area using geo-spatial techniques: The case of Dhaka megacity, Bangladesh

This study determined the spatio-temporal changes of urban eco-environmental quality (UEEQ) of a rapidly growing megacity-Dhaka, Bangladesh, based on the Pressure-State-Response (PSR) framework. A comprehensive index with the combination of five vegetation indices and four urban indices that met the Pressure-State-Response (PSR) framework integrated through principal component analysis (PCA) was developed to assess urban eco-environmental quality index (UEQI) in 2000 and 2020. The results found that the high proportion of UEQI in the study area was very poor to poor and clustered in the city center and western periphery. Moran’s I and LISA confirmed the non-randomness pattern of UEQ in the city. The findings could provide a quantitative foundation for decision makers to balance eco-environmental quality and urbanization