An investigation of the relationship between the flood wave speed and parameters in runoff-routing models
An investigation of the relationship between the flood wave speed and parameters in runoff-routing models
复制标题
径流演进模型中洪水波速与参数关系的研究
DOI：
10.1080/02626669809492118
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
I. Cordery
中科院分区：
文献类型：
--
作者：
N. Sriwongsitanon;J. Ball;I. Cordery
摘要洪水管理的一个重要方面是通过模拟洪水波在集水区的传播来估计集水区对暴雨事件的响应。根据储存（S）-放电关系S = kQm中的放电（Q）和指数（m）推导出波速（c）。波速-流量关系式为c =（α mc/m）Q1-m，其中αc是运动波模型中的一个参数。然而，这种关系中的参数随横截面中的水流条件而变化，特别是当水流离开主槽淹没河漫滩时。这一发现证实，在单一的存储-排放关系的参数不具有离散值，在许多径流路由模型中使用，因此，使用单一的参数值是不适合在许多情况下估计洪水。结果表明，较合理的关系式为S = Sc + k1 LQ 1/B，其中Sc为阈值存储量，其它参数为流量的函数。
Abstract An important aspect of flood management is the estimation of catchment response to storm events by simulation of flood wave propagation through the catchment storage. A derivation of the wave speed (c) is presented in terms of discharge (Q) and the exponent (m) in the storage (S)-discharge relationship S = kQm. The wave speed-discharge relationship has the form c = (αm c/m)Q1-m, where αc is a parameter in the kinematic wave model. The parameters in this relationship, however, change with flow conditions in the cross section, especially as flow leaves the main channel to inundate the floodplain. This finding confirms that the parameters in the single storage-discharge relationship do not have discrete values as used in many runoff-routing models, and hence the use of single parameter values is not suitable for estimating floods in many situations. It is shown that a more reasonable relationship is S = Sc + k1LQ1/b, where Sc is a threshold storage, and the other parameters are functions of the flow...