Flood magnitude is divided into three levels with values from 1 to 3. The value 1 represents that the rain continued and the crops were damaged; 2 represents that the lowlands are flooded, but the uplands are undisturbed; 3 represents that highland inundation, or the infrastructure was destroyed.In our research, the Chinese traditional month and date were replaced by the correspondent time in the Gregorian calendar. Chinese historical data always mentioned the season, but we used a range of months to refer the season in the Chinese lunar Calendar.Historical records in our research come from two important Chinese eras: the Qing Dynasty (1644–1911) and Republican China (1912–1949). During most time of the Qing Dynasty, Jinzhou prefecture administrated the geographical area covered by the Daling River Basin, where Jin County was the dominant city. The name of Jin County was inherited during the period of Republican China and People's Republic China, while its administrative level changed several times. Jin County was renamed as Linghai City in 1993. In our research, Chinese historical materials prefer to record famine, drought, and flood based on the administration area, as well as sometimes pointing to the occurrence of disasters in specific natural rivers. We considered relative area of various locations to Daling River to evaluate flood magnitude.1 represents Jinzhou prefecture, Jin County, which was located at the lower reach of the Daling River;Source Abbr.QLSH: Department of Science and Technology, Department of Water Pipes and Ministry of Water Resources and Power, Research Institute of Water Resources and Power, 1996, Archives of flood and waterlogging in Liao River, Songhua River, and Heilongjiang Basin in Qing dynasty Archives of flood and waterlogging in Zhejiang, Fujian, and Taiwan in Qing dynasty. Beijing, Zhonghua shuju (in Chinese).Hu and Luo, 1992: Hu, M. S. and Luo, C. Z., 1989, Great flood in Chinese history. Beijing, Zhongguo shudian (in Chinese).Liaoning Institute of Meteorological Sciences, 1974：Liaoning Institute of Meteorological Sciences, 1974, History of Drought and Flood in Liaoning Province. Shenyang, Liaoning Institute of Meteorological Sciences (in Chinese).1 represents Jinzhou prefecture, Jin County, which was located at the lower reach of the Daling River；2 represents Daling River mainstream;3 represents the western tributary of the Jinxian county;4 represents the Xiaoling River, which is near to the Daling River;5 represents Yixian, which was located in the middle reach of the Daling River.