METHOD FOR ESTIMATING AMOUNT OF DUSTFALL, DEVICE FOR ESTIMATING AMOUNT OF DUSTFALL, AND PROGRAM FOR ESTIMATING AMOUNT OF DUSTFALL

摘要

A method for estimating the amount of dustfall comprising a wind direction/wind velocity information input step for acquiring the time series values of wind direction and wind velocity during a predetermined period, dividing the ranges of wind direction and wind velocity, respectively, into m and n sub-ranges, setting a representative wind velocity value for every sub-range of wind velocity, making an m×n matrix of the wind direction/wind velocity frequency distribution by determining the frequency of time series measurements included in each division range during the predetermined period, and setting the representative wind velocity value and the wind direction/wind velocity frequency distribution as wind direction/wind velocity information; a dust source information input step for inputting information about a dust source; a concentration of dust calculation step for calculating the concentration (c) of dust at an arbitrary coordinate point using the wind direction/wind velocity information and the information about a dust source; and a dustfall calculation step for calculating the amount of dustfall at an arbitrary point.