翻訳と辞書 Words near each other ・ Rationalism ・ Rationalism (architecture) ・ Rationalism (disambiguation) ・ Rationalism (international relations) ・ Rationalist Association ・ Rationalist Association of India ・ Rationalist humanism ・ Rationalist International ・ Rationalist Society of Australia ・ Ratimir, Duke of Lower Pannonia ・ Ratina ・ Rating ・ Rating (electrical) ・ Rating (Empty Properties) Act 2007 ・ Rating (pharmaceutical industry) ・ Rating curve ・ Rating Percentage Index ・ Rating scale ・ Rating scales for depression ・ Rating site ・ Rating system ・ Rating system of the Royal Navy ・ Ratingen ・ Ratingen Ost station ・ Ratingen-Breitscheid ・ Ratingen-Homberg ・ Ratingen-Lintorf ・ Ratinger Löwen ・ Ratings ballot ・ Ratings for The NHL on ABC Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rating curve ： ウィキペディア英語版 Rating curve In hydrology, a Rating curve is a graph of discharge versus stage for a given point on a stream, usually at gauging stations, where the stream discharge is measured across the stream channel with a flow meter. Numerous measurements of stream discharge are made over a range of stream stages. The rating curve is usually plotted as discharge on x-axis versus stage (surface elevation) on y-axis. (Note that the figure shown has the axes with labels interchanged - incorrectly). The development of a rating curve involves two steps. In the first step the relationship between stage and discharge is established by measuring the stage and corresponding discharge in the river. And in the second part, stage of river is measured and discharge is calculated by using the relationship established in the first part. Stage is measured by reading a gauge installed in the river. If the stage-discharge relationship doesn’t change with time, it is called permanent control. If the relationship does change, it is called shifting control. Shifting control is usually due to erosion or deposition of sediment at the stage measurement site. Bedrock-bottomed parts of rivers or concrete/metal weirs or structures are often, though not always, permanent controls. If G represents stage for discharge Q, then the relationship between G and Q can possibly be approximated with the equation: $Q\; =\; C\_r\; (G-a)^\backslash beta$ where $C\_r$ and $\backslash beta$ are rating curve constants, and $a$ is a constant which represents the gauge reading corresponding to zero discharge. The constant $a$ can be measured when a stream is flowing under "section control" as the surveyed gauge height of the lowest point of the section control feature. When a stream is flowing under "channel control" conditions, the parameter $a$ does not have a physical analogue and must be estimated by following standard methods given in literature. The parameter $\backslash beta$ is typically in the range of 2.0 to 3.0 when a stream is flowing under section control, and in the range of 1.0 to 2.0 when a stream is flowing under channel control. A stream will typically transition from section control at lower gauge heights to channel control at higher gauge heights. The transition from section control to channel control can often be inferred by a change in the slope of a rating curve when plotted on log-log graph paper. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rating curve」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.