Sediment concentration versus water discharge during single hydrologic events in rivers
Sediment concentration versus water discharge during single hydrologic events in rivers
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DOI：
10.1016/0022-1694(89)90254-0
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发表时间：
1989
影响因子：
6.4
通讯作者：
G. Williams
中科院分区：
文献类型：
--
作者：
G. Williams
对洪水等水文事件的含沙量(C)和流量(Q)之间的关系进行了定性的研究，分析了“平滑”的时间图(流量和浓度随时间的变化)在模式、扩散和偏度方面的变化。比较流量过程上升段和下降段在给定流量下的C-Q比，为C-Q关系的分类提供了一种一致、可靠的方法。这类关系的五种常见类别是单值(直线或曲线)、顺时针循环、逆时针循环、单值加一环和图8。时态图模式和偏斜度影响关系的类型，而时态图扩散影响特定C-Q关系的细节(其图形宽度、形状、方向和绘制位置)。文中给出了各种类型的关系的实例，包括迄今鲜有人注意的变化，如数字8。讨论了各种类型的C-Q关系的解释。
Relations between sediment concentration (C) and water discharge (Q) for a hydrologic event, such as a flood, are studied qualitatively by analyzing “smoothed” temporal graphs (discharge and concentration vs. time) in terms of mode, spread, and skewness. Comparing C Q ratios at a given discharge on the rising and falling limbs of the discharge hydrograph provides a consistent, reliable method for categorizing C–Q relations. Five common classes of such relations are single-valued (straight or curved), clockwise loop, counterclockwise loop, single-valued plus a loop, and figure eight. Temporal-graph mode and skewness influence the type of relation, whereas temporal-graph spread affects the details of the particular C–Q relation (its graphical breadth, shape, orientation, and plotted location). Field examples of the various types of relations are given, including varieties that heretofore have received little attention, such as the figure eight. Explanations for each type of C–Q relation are discussed.