| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and accurately estimate a flow rate of a river in a mountainous district in which flow rate measurement is not performed, by altering a conventional river flow rate estimation method based on a basin ratio.SOLUTION: Based on a topographical map on the market, heights of investigation river basins (a plurality of basin targets) for each of altitude zones and areas for each of altitude zones are inputted, a three-dimensional basin topographical correlation area Aeq and a three-dimensional basin topological correlation height Heq catching basin topology in a three-dimensional manner with the altitudes and the areas as input data are calculated independently of each other and uniquely, and a basin topographical slope Seq is calculated. A regression function of a river flow rate including at least the Aeq, Heq, Seq in parameters is induced. The regression function is applied to compute an estimate flow rate at a spot where flow rate measurement is not performed. Further, the regression function is applied to estimate a river flow rate and a verification error rate is calculated, thereby evaluating whether or not the regression function is appropriate. |
