Author(s): Kun-Yeun Han; Kyu-Hyun Choi; Gwangseob Kim
Linked Author(s):
Keywords: Cokriging; Weather radar; Rain gauge network; Spatial rainfall estimation
Abstract: The spatial variability of rainfall in a mountainous country, Korea, is very large because of orographic influences and accurate spatial rainfall information is essential to improve the performance of hydrologic models. An ordinary cokriging technique, which optimally merges radar reflectivity data into rain gauges data, has been applied to improve the traditional spatial rainfall estimation method which was depended on only rain gauge networks. The advantages of this approach are that it is not influenced by the attenuation problem of C-band weather radar, which is main drawback of C-band radar at heavy rainfall estimation and it takes use of the advantageous dense rain gauge networks in Korea. Results show that rainfall fields estimated by ordinary cokriging give the improved results than that of traditional approach.
Year: 2005