シンボルマーク独立行政法人土木研究所 寒地土木研究所

論文・刊行物検索

詳細情報

発表 River Flow Measurement with Non-Contact Radio Current Meter

作成年度 2011年度
論文名 River Flow Measurement with Non-Contact Radio Current Meter
論文名(和訳) 非接触型電波式流速計を用いた河川流量観測
論文副題
発表会 AGU Fall Meeting 2011
誌名(No./号数)
発表年月日 2011/12/07 ~ 2011/12/09
所属研究室/機関名 著者名(英名)
道東支所稲垣 達弘(INAGAKI Tatsuhiro)
寒地河川チーム島田 友典(SHIMADA Tomonori)
水環境保全チーム横山 洋(YOKOYAMA Hiroshi)
抄録
In Japan、 river flow data related to medium sized and small rivers are scarce compared to similar resources for major rivers - a situation attributable to the current problem of inefficient river flow measurement. Accordingly、 a laborsaving、 safe and reliable measurement method should be established. The radio current meter is expected to enable safe、 automatic flood-discharge monitoring because of its suitability for unmanned flow rate measurement without being in contact with the water itself. The authors applied velocity correction to measurements taken with the radio current meter using the ratio of surface velocity to cross-sectional mean velocity、 and examined a method for smooth switching of the sectional area of the stream before and after flooding. The ratio of surface velocity measured using a radio current meter to cross-sectional mean velocity measured using an ADCP was found to be almost equal to the surface float coefficient (0.85). It was also confirmed that cross-sectional mean velocity could be evaluated using surface velocity with an accuracy of approximately ±10% even when this coefficient was applied as the velocity correction factor. A cross-sectional area of flow close to that shown by actual measurement values from the start to the end of flooding was reproduced by estimating the time-series change in the river channel cross section using friction velocity values found from continuous flow velocity data obtained with a radio current meter and by smoothly switching the cross sectional area of flow from that before to that after flooding.
このサイトで提供される情報には、PDFファイルが使われています。PDFファイルをご覧頂くにはAdobeReaderが必要です、「Get AdobeReader」をクリックしてダウンロードしてください。 AdobeReaderダウンロード
ページの先頭へ

この画面を閉じる

Copyright (C) 2006 Independent Administrative Institution Civil Engineering Research Institute for Cold Region.