Dynamic quantitative method for soil erosion based on 7Be tracing

The invention relates to the field of soil erosion and water and soil conservation, and discloses a soil erosion dynamic quantitative method based on 7Be tracing, which comprises the following steps: S1, sample collection; s2, sample nuclide analysis; s3, calculating the soil erosion rate; s4, dynamically analyzing the soil erosion amount, importing the soil 7Be area activity and soil erosion rate data of a basin monitoring point subrainfall event through geographic information management software on the basis of a basin land utilization current situation map, supplementing the soil erosion rates of other positions of the basin by adopting an interpolation method, and calculating the basin soil loss amount according to the basin area. The dynamic change of soil erosion of a drainage basin or a production and construction project is obtained through a sub-rainfall event and seasonal monitoring. According to the soil erosion dynamic quantitative method based on nuclear technology tracing, time-space dynamic mon