In this research the distributions of flood and drought during the warm and cold periods alst 500 years has been studied by means of historical comparison.

• 本研究一方面用历史类比方法研究近500年我国历史冷朝时期的旱涝分布特征，另一方面分析人类活动，特别是城市建设发展对旱涝灾害的影响。