Generation and verification of theoretical rating curves in the Whitewater River basin, Kansas
Generation and verification of theoretical rating curves in the Whitewater River basin, Kansas
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DOI：
10.1029/2004jf000250
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发表时间：
2005-11-18
影响因子：
3.9
通讯作者：
Smith, JD
中科院分区：
文献类型：
--
作者：
Kean, JW;Smith, JD
提出了一种生成地貌稳定河道水位流量关系(额定曲线)的新方法，并将其应用于堪萨斯州白水河流域的两条河流。该方法使用基于流体力学的模型将水位测量转换为流量。该模型不使用经验糙率系数，如曼宁系数，而是根据(1)河道几何形状、(2)河床、堤岸和滩地的物理糙率以及(3)堤岸和滩地的植被密度的现场测量确定河道糙率。这些测量被用来显式地计算边界上小尺度地形地物上的阻力、木本植物树干和枝干上的阻力以及河床、堤岸和滩涂上的摩擦力。该模型为美国地质调查局(USGS)流量测量站附近的两个研究河段生成的理论额定曲线与USGS的流量直接测量结果吻合良好。与传统的测量方法相比，我们的方法有可能以更低的成本提供准确的水流估计。此外，与传统的基于曼宁系数估算的间接流量估算方法相比，该方法可以获得更准确的流量估算。
A new method for generating stage-discharge relations (rating curves) for geomorphically stable channels is presented and applied to two streams in the Whitewater River basin, Kansas. The approach converts measurements of stage into discharge using a fluid mechanically based model. The model does not use empirical roughness coefficients, such as Manning coefficients, but rather determines channel roughness from field measurements of the (1) channel geometry, (2) the physical roughness of the bed, banks, and floodplain, and (3) the vegetation density on the banks and floodplain. These measurements are used to calculate explicitly the drag on the small-scale topographic features on the boundary, the drag on the stems and branches of woody vegetation, and the friction on the bed, banks, and floodplain. The theoretical rating curves produced by the model for two study reaches, which are near U.S. Geological Survey (USGS) streamflow-gauging stations, are in good agreement with direct measurements of discharge made by the USGS. Our method has the potential of providing accurate estimates of stream flows less expensively than conventional gauging methods. In addition, the method can be used to obtain more accurate discharge estimates than conventional indirect methods for determining discharge, which are based on estimates of Manning's coefficient.