Waterlogging Assessment of Chinese Ancient City Sites Considering Microtopography: A Case Study of the PuZhou Ancient City Site, China

A waterlogging assessment framework based on the stormwater management model (SWMM), considering microtopography, is proposed (taking into account complexity of underlying surface, which contains various micro-surface features within Chinese ancient city site). We used site PuZhou as study case and detailed in this paper. First, land cover was classified by combining analysis UAVs field surveys; subsequently, a revised sub-catchment division method to obtain more accurate reliable sub-catchments; thirdly, parameters SWMM were determined analyzing features; finally, inundation area calculated SWMM-GIS. To verify advantage our framework, two comparative experiments where not considered stages parameter estimations carried out. The simulated derived from with return periods 10a., 50a., 100a., 1000a. (separately) 22,500 m2, 29,500 33,600 44,200 are line actual situation compared designed experiments. experimental results show that has significant meaning site.