利用中国清代档案的有关雨雪记载及现代土壤参数、土壤水分观测与实验资料，重点进行清代逐季降水重建的定量反演模型研究；重建黄河下游地区1736～1911年的逐季降水序列；探讨该地区气候变化规律。其意义在于：为全面重建中国清代的逐季降水提供一套新方法；为全球变化研究和黄河下游地区环境变化研究提供高分辨率的长降水序列。.

Based on snow and rainfall archives records in the Qing Dynasty, the modern meteorological and agro-meteorological observation data, according to soil physics models of precipitation infiltration and the surface water balance equation, we designed the quantitative method of precipitation reconstruction by using related archives in the Qing Dynasty; Seasonal precipitation series were reconstructed in the six areas during in the period of 1736-1910, which include Ji'nan, Weifang, Tai'an, Heze and Linyi in Shandong Province, Xi'an in Shaanxi Province; Meanwhile, the annual winter mean temperature series in Xi'an and Hanzhong areas from 1736 to 2000 are reconstructed, based on the snowfall-days of Yu Xue Fen Cun in Xi'an and Hanzhong, according to the statistics relationship between snowfall-days and winter temperature by counting and analyzing instrumental data. Otherwise, we deeply analyzed these series in this project, and the results shows that the precipitation change features in Xi'an area (Shaanxi) and Shandong province since 1700's and precipitation differences in the Middle and Lower reaches areas of the Yellow River.