Analysis of Rainfall Rate by a Doppler Radar Image

Authors

  • Sujitra Arwatchananukul Department of Computer Science, Faculty of Science, Chiangmai University, Chiang Mai, Thailand, 50200
  • Panipa Phaiboonnimit Department of Computer Science, Faculty of Science, Chiangmai University, Chiang Mai, Thailand, 50200.

Abstract

In Thailand, Royal rain radar is an effective tool to measure and monitor rain continuously. In addition, it is useful for planning,
evaluation, and flood warning.

Therefore, the propose of this paper is to analyses rainfall rate systematically by a Doppler radar image based on digital image
process. This system uses 646x644 pixel-GIF image as an input for finding all considered clouds. Then, it classifies dBz reflective
signal levels by using ZR relationship, Z = 300R 1.4 , to calculate the average rainfall rate. According to the rainfall testing data in 15
days with 200 Doppler radar images compared to data of 20 rain gauges at a random period. It is found that the error of calculated
rainfall is 36.82 % on the total average deviation.

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Published

2011-08-04

Issue

Vol. 19 No. 1 (2011): January-April 2011

Section

Science and Technology

License

Copyright (c) 2011 Naresuan University Journal: Science and Technology

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.