Abstract
This study was designed to clarify the accuracy of X-band multi-parameter radar (X-MP) over the Hokuriku region using rain gauge data and quantitative precipitation estimation (QPE) by C-band radar. Moreover, this study used results of the correlation coefficient and estimate error for QPE accuracy analysis.
Temporal analysis revealed that X-MPs provide observation data with high accuracy for short-term downpours, but results for long-term and light rainfall or regions distant from the radar site were less accurate.
Spatial analysis showed the X-MP data accuracy was observable with sufficient accuracy within a range of 2.25 × 2.25 km as the center of each rain gauge station. The X-MP data accuracy has less than the C-band radar data accuracy beyond a 20 km radius from the radar site.
Quantitative analysis of the rainy season and snowy season, total precipitation of X-MP and C-band radar were overestimated from that of the rain gauge station, it was especially overestimated significantly during the snowy season.
