Water level delay factor-based drainage basin water level delay influence time prediction model

The invention provides a drainage basin water level delay influence time prediction model based on a water level delay factor, which is established by calculating the water level delay influence time of an upstream water level or flood discharge measured by an upstream measuring point on a downstream measuring point based on historical water level data. The model performs real-time fitting on the calculated water level delay influence time based on upstream and downstream water levels, wind speed and rainfall factors so as to improve the accuracy of a drainage basin monitoring system; measuring points in the prediction model are arranged at a main stream, a branch stream, a dam or a sluice of the drainage basin, and the upstream measuring points and the downstream measuring points are directly associated on the hydrological space structure of the drainage basin; the factors influencing the water level of the downstream measuring point are historical water level, rainfall and flood discharge at the upstream me