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Water 2017, 9(12), 931; https://doi.org/10.3390/w9120931

Effects of Using High-Density Rain Gauge Networks and Weather Radar Data on Urban Hydrological Analyses

WISE Institute, Hankuk University of Foreign Studies, Yongin-si, Gyeonggi-do 17035, Korea
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Received: 7 October 2017 / Revised: 27 November 2017 / Accepted: 28 November 2017 / Published: 29 November 2017
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Abstract

Flood prediction is difficult in urban areas because only sparse gauge data and radar data of low accuracy are usually used to analyze flooding and inundation. Sub-basins of urban areas are extremely small, so rainfall data of high spatial resolution are required for analyzing complex drainage systems with high spatial variability. This study aimed to produce three types of quantitative precipitation estimation (QPE) products using rainfall data that was derived from 190 gauges, including the new high-density rain-gauge network operated by the SK Planet company, and the automated weather stations of the Korea Meteorological Administration, along with weather radar data. This study also simulated urban runoff for the Gangnam District of Seoul, South Korea, using the obtained QPE products to evaluate hydraulic and hydrologic impacts according to three rainfall fields. The accuracy of this approach was assessed in terms of the amount and spatial distribution of rainfall in an urban area. The QPE products provided highly accurate results and simulations of peak runoff and overflow phenomena. They also accurately described the spatial variability of the rainfall fields. Overall, the integration of high-density gauge data with radar data proved beneficial for quantitative rainfall estimation. View Full-Text
Keywords: high-density gauge network; rain gauge; weather radar; quantitative precipitation estimation; urban runoff simulation high-density gauge network; rain gauge; weather radar; quantitative precipitation estimation; urban runoff simulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Yoon, S.-S.; Lee, B. Effects of Using High-Density Rain Gauge Networks and Weather Radar Data on Urban Hydrological Analyses. Water 2017, 9, 931.

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