Fig. 4: Liangzhu Hydraulic construction investment intensity and normalized δ13C records from central and south China (reconstructed from Zhang et al. 2021).
From: Towards an antifragility framework in past human–environment dynamics

Most construction and upkeep take place during the first several centuries of the Liangzhu culture, only limited upkeep is pursued from ~4600 BP, and none is documented after ~4500 BP. Note that the wet phase at ~4300 BP, when the Liangzhu culture ends, is not ‘higher’ in comparison to peak wet periods in the past.