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首页> 外文期刊>Journal of the American Water Resources Association >A TRIANGULAR MODEL OF DIMENSIONLESS RUNOFF PRODUCING RAINFALL HYETOGRAPHS IN TEXAS
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A TRIANGULAR MODEL OF DIMENSIONLESS RUNOFF PRODUCING RAINFALL HYETOGRAPHS IN TEXAS

机译：德克萨斯州产生无径流径流图的三角模型

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摘要

A synthetic triangular hyetograph for a large data base of Texas rainfall and runoff is needed. A hyetograph represents the temporal distribution of rainfall intensity at a point or over a watershed during a storm. Synthetic hyetographs are estimates of the expected time distribution for a design storm and principally are used in small watershed hydraulic structure design. A data base of more than 1,600 observed cumulative hyetographs that produced runoff from 91 small watersheds (generally less than about 50 km~2) was used to provide statistical parameters for a simple triangular shaped hyetograph model. The model provides an estimate of the average hyetograph in dimensionless form for storm durations of 0 to 24 hours and 24 to 72 hours. As a result of this study, the authors concluded that the expected dimensionless cumulative hyetographs of 0 to 12 hour and 12 to 24 hour durations were sufficiently similar to be combined with minimal information loss. The analysis also suggests that dimensionless cumulative hyetographs are independent of the frequency level or return period of total storm depth and thus are readily used for many design applications. The two triangular hyetographs presented are intended to enhance small watershed design practice in applicable parts of Texas.
机译：需要用于德克萨斯州降雨和径流量的大型数据库的合成三角hytoograph。曲线图表示暴风雨期间某个地点或流域上方降雨强度的时间分布。合成型液压记录仪是对设计风暴的预期时间分布的估计，主要用于小型流域水工结构设计。一个由1,600多个观察到的累积式水文记录仪组成的数据库从91个小流域（通常小于50 km〜2）产生了径流，用于为简单的三角形水文记录仪模型提供统计参数。该模型对0到24小时和24到72小时的暴风雨持续时间以无量纲形式对平均断面图进行了估算。这项研究的结果是，作者得出的结论是，预期的0至12小时和12至24小时持续时间的无量纲累积曲线图非常相似，可以将信息损失降至最低。分析还表明，无因次累积曲线图与总风暴深度的频率水平或返回周期无关，因此很容易用于许多设计应用。所展示的两个三角形Hyetograph旨在增强德克萨斯州适用地区的小流域设计实践。

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