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Improving kinematic wave routing scheme in Community Land Model

机译：社区土地模型中运动波路由方案的改进

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摘要

Version 3.5 of Community Land Model (CLM) has incorporated a river routing module, called the River Transport Model (RTM), to simulate the runoff routing process over a hydrologic basin. RTM treats river routing as a linear reservoir process propagated through a gridded domain. Because the flow velocity at each grid is set as a constant, RTM cannot simulate river routing well. In this paper, we developed a large scale catchment-based kinematic wave routing (KWR) model to be coupled with CLM, which simulates the movement of water through floodplains and river channels. An advantage of KWR over RTM is that the flow velocity is calculated by the Manning equation, which considers the difference in friction slope and hydraulic radius in each sub-basin (or grid) and time step. A second advantage is that the KWR velocity parameterization accounts for spatial-temporal variability, using the daily runoff simulations in continental China over the time period 1995-2004 from CLM3.5 as inputs to both RTM and KWR, we found that the simulated discharge of KWR is closer to observed discharge than that of RTM. Our study has shown that KWR may be a valid alternative to RTM in CLM.
机译：社区土地模型（CLM）的3.5版已合并了一个河流路由模块，称为河流运输模型（RTM），以模拟水文盆地上的径流路由过程。 RTM将河流路线视为通过网格化域传播的线性水库过程。由于将每个网格处的流速设置为常数，因此RTM无法很好地模拟河道。在本文中，我们开发了一个基于集水区的大型运动波路由（KWR）模型，并与CLM耦合，该模型模拟了水在洪泛区和河道中的流动。 KWR优于RTM的优点是，流速是通过Manning方程计算的，该方程考虑了每个子流域（或网格）和时间步长的摩擦斜率和水力半径的差异。第二个优点是，KWR速度参数化考虑了时空变化，利用1995-2004年中国大陆CLM3.5期间的每日径流模拟作为RTM和KWR的输入，我们发现模拟的KWR流量KWR比RTM更接近观察到的放电。我们的研究表明，KWR可能是CLM中RTM的有效替代方案。

著录项

  • 来源
    《Nordic hydrology》 |2013年第5期|886-903|共18页
  • 作者

    Aizhong Ye; Qingyun Duan; Chesheng Zhan; zhaofei Liu; Yuna Mao;

  • 作者单位

    State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global change and Earth System Science, Beijing Normal University, Beijing 100875, China;

    State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global change and Earth System Science, Beijing Normal University, Beijing 100875, China;

    Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun, Beijing 100101, China;

    Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun, Beijing 100101, China;

    State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global change and Earth System Science, Beijing Normal University, Beijing 100875, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    catchment-based kinematic wave routing; China, Community Land Model; discharge; River Transport Model;

    机译：基于流域的运动波路径;中国;社区土地模型;排出;内河运输模型;

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