81011353

open access

Version of Record

GPSを用いた降雨時の大阪湾周辺の水蒸気分布の解析手法に関する研究

Analytical method for detecting water vapor distribution around Osaka Bay in the rain by using GPS

Japanese (日本語)

神戸大学都市安全研究センター研究報告

15

143-151

神戸大学都市安全研究センター

2011-03

2019-05-30

This paper describes two analytical methods for detecting water vapor's space distribution and time variation by using GPS. First method uses data of precipitable water vapor by GPS on July 28, 2008, at the time of the Tokagawa river accident. Time series variations of precipitable water vapor's distribution has been analyzed. Second method uses residuals of GPS data. Relationship between residuals and satellite elevation has been investigated, and the time series variations of residuals were compared. By first method, it was founded that precipitable water vapor had been risen just before the rain around Osaka Bay. Moreover, by comparing data of precipitable water vapor at six GPS receiver spots along Yodogawa river channel, it was discovered that moist atmosphere moved from north to south parts of river basin. Meanwhile, by second method, fact that residuals do not depend on elevation angles was found. Also, by time series variations of residuals, amount of water vapor in the atmosphere on Osaka bay was considered to increase from normal in case of rain.

大阪湾

紀要論文