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Network configuration and hydrograph sensitivity to storm kinematics

机译：网络配置和水位图对风暴运动的敏感性

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摘要

This paper explores the relationship between channel network configurations and hydrograph sensitivity to storm kinematics with different storm speeds, storm directions, and storm sizes. A synthetic circular catchment is introduced, in order to prevent bias due to interaction between storm directions and catchment geometry. The drainage network of the test catchment is simulated with Gibbs' model for a given network configuration (β). The peak response of the catchment is investigated with different configurations of drainage network, combined with different conditions of storm kinematics. The results show that the relationship between storm kinematics and the peak discharge response is dependent on the network configuration. The network configuration indicates the network efficiency in terms of the total drainage time of a network. The resonance condition can be defined for a 2-D drainage network as the inverse of the averaged total sum of flow distance. The results show that the storm kinematics that produces the maximum peak discharge depends on the network configuration because the resonance condition changes with the network configuration. The investigation of 12 catchments in the Chicago area indicates that urban drainage networks, typically, are highly efficient but can also be inefficient. The results illustrate that more inefficient networks (networks with lower β) are less sensitive to rainstorm movement and produce lower peak discharge, compared with efficient networks. In contrast, an efficient network produces higher peak discharges and is more sensitive to storm kinematics, compared with an inefficient network.
机译：本文探讨了在不同风暴速度，风暴方向和风暴大小的情况下，渠道网络配置与水位图对风暴运动学敏感性之间的关系。引入了一个合成的圆形集水区，以防止由于风暴方向和集水区几何形状之间的相互作用而产生偏差。对于给定的网络配置（β），用Gibbs模型模拟了测试流域的排水网络。在不同的排水网络配置下，结合不同的风暴运动条件，研究了流域的峰值响应。结果表明，风暴运动学与峰值放电响应之间的关系取决于网络配置。网络配置以网络的总排水时间表示网络效率。可以将二维排水网络的共振条件定义为平均流动距离总和的倒数。结果表明，产生最大峰值放电的风暴运动学取决于网络配置，因为共振条件随网络配置而变化。对芝加哥地区12个流域的调查表明，城市排水网络通常效率很高，但效率也很低。结果表明，与有效网络相比，效率较低的网络（β值较低的网络）对暴雨运动的敏感性较低，峰值流量较低。相反，与低效率的网络相比，高效的网络会产生更高的峰值流量，并且对风暴运动学更加敏感。

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  • 来源
    《Water resources research》 |2013年第4期|1812-1827|共16页
  • 作者

    Yongwon Seo; Arthur R. Schmidt;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Ave., Urbana, IL 61801-2352, USA;

    Department or Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA;

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