Isotope Age of Groundwater in Lubei Plain and an Evaluation of Its Renewable Capacity
鲁北平原地下水同位素年龄及可更新能力评价

In this paper, a large number of groundwater environmental isotope data and the common measurement technology for natural radioactive tritium and 14C were used to estimate the formation age of shallow and deep groundwater and evaluate the renewable capacity of groundwater. The results show that the main supply of shallow groundwater in Lubei plain is the local atmospheric precipitation and the surface irrigation water from the Yellow River, whose recycle is fast with a cyclic period of 20~50 years. Hence, the renewable capacity is strong. The deep groundwater mainly originated from ancient atmospheric precipitation in a cold climate, whose recycle is slow with a cyclic period of 8000~20000 years. And hence its renewable capacity is weak.