Distributed soil water storage capacity parameter iteration method based on spatial distribution function

The invention discloses a distributed soil water storage capacity parameter iteration method based on a spatial distribution function. According to the method, soil hydrological attributes are estimated based on soil physical characteristics of a drainage basin underlying surface; based on the soil hydrological attribute and the soil thickness, calculating to obtain a priori soil water storage capacity parameter spatial score in the drainage basin; in combination with a water system network in the drainage basin, extracting drainage basin upstream incoming flow path length space distribution; constructing a parameter adjustment coefficient spatial distribution function based on drainage basin upstream incoming flow path length spatial distribution and prior soil water storage capacity parameter spatial distribution; and adjusting the spatial distribution of the priori soil water storage capacity parameters by using a parameter adjustment coefficient spatial distribution function to obtain optimized spatial di