Case Study of Urban Flood Inundation—Impact of Temporal Variability in Rainfall Events

Optimized Schemes of “Infiltration”, “Storage”, and “Drainage” Measures against Urban Waterlogging in Plain River Network Regions

Urban waterlogging has risen to be an urgent problem awaiting solutions in China these years, and “infiltration”, “storage”, and “drainage” are considered the major and most direct measures against this problem. In the present work, the waterlogging alleviation mechanism of these three measures is analyzed; and with Huangbian Village in Panyu District of Guangzhou, China, as a study case, one-dimensional, two-dimensional, and pipe network coupling hydrodynamic models were established to explore the optimal schemes of “infiltration”, “storage”, “drainage” measures against urban waterlogging and which measure is the most effective one, providing a reference for scientific prevention and alleviation of urban waterlogging in cities. Effect assessment shows that the “storage” is the most effective measure because reducing the impermeability near the waterlogged site, deploying storage tanks upstream of the waterlogged site, and in the case of submerged discharge, lowering the downstream water level can reduce the waterlogged area by 16%, 81%, and 16%, respectively. The comprehensive measures of “infiltration”, “storage”, and “drainage” reduced the waterlogged area by 87%, which is superior to a single measure. The present work is expected to provide some reference for the prevention and alleviation of urban waterlogging in cities on a plain with intensive river networks.