4.4 Limitations and future research
There are some limitations in this study. When exploring the impact of
urbanization on hydrological process, it is best to conduct research on
the watershed level. This study only involved one single city (the
developed urban areas), it needs to validate the results in other
similar areas. Owing to coarse time resolution of urban flood records
(2011–2021), we cannot accurately assess the relationship between the
position of flooding events and rainfall intensity. Additionally, the
amount and depth of flooding were unavailable, and thus hinder further
comprehensively understanding the relationship between urban flood and
its explanatory factors. Despite these limitations, this study provided
quantitative insight into the nonlinear relationship and magnitude
between the 3D building morphology and urban flooding.