| Title |
A Study on the Precision of Precipitation Observations according to the Layout and Resolution of the Precipitation Gauge Observation Network |
| Authors |
강나래(Kang, Narae);김치영(Kim, Chiyoung);윤정수(Yoon, Jungsoo);황석환(Hwang, Seokhwan) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.5.0549 |
| Keywords |
강수량계;관측 정확도;강우강도;정밀도;분해능 Precipitation gauge;Accuracy of observation;Rainfall intensity;Precision;Resolutions |
| Abstract |
Precipitation data collected from rain gauges are used as input data for rainfall-runoff analysis models and various disaster forecasting and warning systems. For this reason, rain gauge data play a crucial role in disaster analysis and prediction. This study aimed to propose an appropriate rain gauge resolution by analyzing the characteristics of different rain gauge resolutions. We analyzed precipitation by station layout (location and density) and conducted accuracy experiments under varying rainfall intensities using precipitation gauges with resolutions of 0.1 mm, 0.5 mm, and 1.0 mm installed at the calibration station. The results revealed considerable variability in precipitation observations depending on the layout and spatial density of AWS and TM stations, with AWS showing lower spatial reproducibility than TM. Furthermore, performance tests of precipitation gauges indicated that the 1.0 mm resolution gauge produced an error of about 1.45 %, which did not increase significantly with higher rainfall intensity, showing a relatively stable pattern. In contrast, errors for 0.5 mm and 0.1 mm gauges increased sharply with rainfall intensity, reaching 7.32 % and 16.3 %, respectively. Given the recent rise in the frequency of heavy rainfall events, the importance of selecting a rain gauge resolution suitable for accurately capturing extreme precipitation is expected to grow. In this regard, the 1.0 mm gauge, which demonstrates consistent accuracy under strong rainfall conditions, may serve as a reliable option for mitigating flood risks during heavy rainfall events. |