Too much water, trees will be uprooted and afloat. The human life cycle is also affected by the same seasonal and environmental changes. The seasonal changes come from the Sun and Moon which are the clock for the calendars. This way humans get their Five Element weights using their birthdate and time. When the seasons and environment change, the Five Elements have certain responses.
Humans respond in a similar way.
The YIN-YANG scholars made predictions on the human life cycle, from birth to death, by using this natural phenomenon.