Estimation of optimal grid size for radar reflectivity using a SWAT model

Changsam Jeong, Kyungwon Joo, Wongeun Lee, Hongjoon Shin, Jun Haeng Heo

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Abstract

To estimate the optimal grid size for radar reflectivity, an artificial neural network (ANN) model was employed to estimate the precipitation in the Soyanggangdam basin in Korea. The model was simulated using constant altitude plan position indicator (CAPPI) data from the weather radar observatory in Gwangduksan. To configure the ANN model, only the reflectivity of cells of the ground observatory was selected to estimate the precipitation. An optimal grid size for the CAPPI, which exhibited minimal influence on runoff, was suggested. The simulated precipitation was applied in a soil and water assessment tool (SWAT) model, which is a continuous physical model utilized to determine variation in runoff and peak flood. An optimal grid size of radar reflectivity in the range of 4-8. km was obtained for the Soyanggangdam basin by analyzing the variation in runoff.

Original languageEnglish
Pages (from-to)20-31
Number of pages12
JournalJournal of Hydro-Environment Research
Volume8
Issue number1
DOIs
Publication statusPublished - 2014 Mar

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All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Management, Monitoring, Policy and Law

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