Drainage effect evaluation is a necessary links in the construction of Sponge City. and urban rainfall mathematical models are important supporting tools for the evaluation work. Taking a residential area in Beijing City as an example. a refined drainage model of the study area was constructed based on a coupled 1D and 2D hydrodynamic model for urban rainstorms. https://www.roneverhart.com/Tokidoki-X-Hello-Kitty-and-Friends-1-Blind-Box/