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http://dx.doi.org/10.3741/JKWRA.2022.55.12.1105

A study on spatial error occurrence characteristics of precipitation estimation of rainfall radar  

Hwang, Seokhwana (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Yoon, Jung Soo (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Kang, Narae (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korea Water Resources Association / v.55, no.12, 2022 , pp. 1105-1114 More about this Journal
Abstract
A study on a method to overcome the limitations of the topographical and hydrological observation environment for estimating the QPE with high consistency with the ground rainfall by utilizing the spatiotemporal observation advantages of the rainfall radar for use in flood forecasting, and quantitative observations of localized rainfall due to these limiting conditions Uncertainty should be identified in terms of flood analysis. Against this background, in this study, 22 major heavy rain events in 2016 were analyzed for each of Mt. Biseul (BSL), Mt. Sobaek (SBS), Mt. Gari (GRS), Mt. Mohu (MHS), and Mt. Seodae (SDS) to determine the observation distance and altitude. The uncertainty of observation was quantified and an error map was derived. As a result of the analysis, it was found that, on average, the rainfall radar exceeded 10% up to 100 km and 30% over 150 km. Based on the average radar operating altitude angle, it was found that the error for the altitude was approximately 10% or less up to the second altitude angle, 20% at the third or higher altitude angle, and more than 50% at the fourth altitude angle or higher.
Keywords
Radar; Rainfall radar; Error; Error estimation; Spatial error; Range distance error; Height distance error;
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