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The measured values showed little difference according to the measurement duration. 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  1. 参考論文

結氷時の感潮域におけるADCP を用いた流量観測手法

https://kitami-it.repo.nii.ac.jp/records/7823
98afbc1a-179b-43ed-8189-dccfd3b0667a
名前 / ファイル ライセンス アクション
2006-11_結氷時の感潮域におけるADCPを用いた流量観測手法.pdf 結氷時の感潮域におけるADCP を用いた流量観測手法 (1.9 MB)
Item type 会議発表論文 / Conference Paper(1)
公開日 2015-06-15
タイトル
言語 ja
タイトル 結氷時の感潮域におけるADCP を用いた流量観測手法
言語
言語 jpn
キーワード
言語 ja
主題Scheme Other
主題 結氷河川
キーワード
言語 ja
主題Scheme Other
主題 感潮域
キーワード
言語 ja
主題Scheme Other
主題 流量観測
キーワード
言語 en
主題Scheme Other
主題 Ice-Covered River
キーワード
言語 en
主題Scheme Other
主題 Tidal Zone
キーワード
言語 en
主題Scheme Other
主題 Discharge observations
資源タイプ
資源 http://purl.org/coar/resource_type/c_5794
タイプ conference paper
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
著者 吉川, 泰弘

× 吉川, 泰弘

WEKO 40288

ja 吉川, 泰弘

Search repository
渡邊, 康玄

× 渡邊, 康玄

WEKO 44829
KAKEN - 研究者検索 00344424

ja 渡邊, 康玄

Search repository
YOSHIKAWA, Yasuhiro

× YOSHIKAWA, Yasuhiro

WEKO 40290

en YOSHIKAWA, Yasuhiro

Search repository
WATANABE, Yasuharu

× WATANABE, Yasuharu

WEKO 40291

en WATANABE, Yasuharu

Search repository
抄録
内容記述タイプ Abstract
内容記述 河川の流量は、流域全体の水資源計画を策定する上で重要な基礎資料である。流量の観測手法を確立するためには、その場所における水理現象を解明する必要がある。結氷時の感潮域においては、結氷時の観
測の困難さ、感潮域の複雑な流況のために、水理現象が十分に解明されているとは言い難い状況にある。
このため結氷時の感潮域における流量の観測手法は、水理現象を解明した上での手法となっていない。本研究は流量観測手法の開発を念頭に置き、結氷時の感潮域における現地観測を行い、水理現象の解明およ
び流量観測に関する知見を得ることを目指している。得られた知見は以下の2点である。1)今回の常呂川における観測結果から、感潮域の非結氷時で成立する流量推定式(佐藤、中津川)は、感潮域の結氷時
においても成立する可能性があると分かった。また流量推定式の係数が、結氷時と非結氷時で異なる事が明らかとなった。2)結氷時の感潮域においてADCP の測定時間を長くしても、その観測期間の横断面
流量の精度は向上しない。またADCP の測定時間の違いによる平均流速の違いは、小さいという事が分かった。今回の天塩川における検討結果から、非定常流れである結氷時の感潮域においてADCP の測定
時間を1測定当り10秒とすれば、ある瞬間の横断面内の平均流速に近づき、その観測期間の横断面流量の精度が向上する事が分かった。
言語 ja
抄録
内容記述タイプ Abstract
内容記述 Data on river discharge is essential for basin-wide water resource planning.Hydraulic phenomena in the freezing waters of ariver's tidal zone have not been suffciently clarifed,because it is difficult to
observe river conditions under ice sheets and the flow regime in such zones with unsteady flow is complex. Discharge in the tidal zone of ice-covered rivers has been measured using the conventional
discharge measurement method for ice-freerivers, even though the accuracy of such measurements is questionable. Toward achieving an improved discharge measurement method for ice-covered rivers, it
is necessary to clarify the hydraulic phenomena in the ice-covered tidal zone. Our field observation in the tidal zones of two ice-covered rivers revealed two main findings: 1)Observations at the Tokoro
River revealed that it might be possible to apply a discharge estimation equation for the tidal zone of an ice-free river(Sato,Nakatsugawa)to an ice-covered river. The discharge estimation equation for the
tidal zone of an ice-covered river employed a different value for the coefficient. 2)In using an ADCP to measure the average discharge within a cross-section of a river channel with unsteady flow,
prolonging the measurement duration did not improve measurement accuracy. The measured values showed little difference according to the measurement duration. We concluded from field survey at the
Teshio River that 10-second measurement is sufficient for measuring discharge in the ice-covered tidal zone.
言語 en
書誌情報 寒地土木研究所月報

巻 642, p. 9-16, 発行日 2006-11
著者版フラグ
値 publisher
出版者
出版者 国立研究開発法人 土木研究所 寒地土木研究所
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