Joo Hongjun, Jun Hwandon, Lee Jiho, Kim Hung Soo
Department of Civil Engineering, Inha University, Incheon 22212, Korea.
Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea.
Entropy (Basel). 2019 Jul 10;21(7):673. doi: 10.3390/e21070673.
A method for constructing a stream gauge network that reflects upstream and downstream runoff characteristics is assessed. For the construction of an optimal stream gauge network, we develop representative unit hydrographs that reflect such characteristics based on actual rainfall-runoff analysis. Then, the unit hydrographs are converted to probability density functions for application to entropy theory. This allows a comparison between two cases: one that considers the upstream and downstream runoff characteristics of a core dam area in South Korea, and another that uses empirical formula, which is an approach that has been widely used for constructing the stream gauge network. The result suggests that the case of a stream gauge network that considers upstream and downstream runoff characteristics provides more information to deliver, although the number of selected stream gauge stations of this case is less than that of the case that uses the empirical formula. This is probably because the information delivered from the constructed stream gauge network well represents the runoff characteristics of the upstream and downstream stations. The study area, the Chungju Dam basin, requires 12 stream gauge stations out of the current total of 18 stations for an optimal network that reflects both upstream and downstream runoff characteristics.
评估了一种构建能反映上下游径流特征的水文站网的方法。为构建最优水文站网，我们基于实际降雨径流分析开发了能反映此类特征的代表性单位线。然后，将单位线转换为概率密度函数以应用于熵理论。这使得能够比较两种情况：一种是考虑韩国某核心坝区上下游径流特征的情况，另一种是使用经验公式的情况，经验公式是一种广泛用于构建水文站网的方法。结果表明，考虑上下游径流特征的水文站网情况能提供更多可传递的信息，尽管该情况下所选水文站的数量少于使用经验公式的情况。这可能是因为所构建的水文站网传递的信息很好地代表了上下游站点的径流特征。研究区域忠州大坝流域，要构建一个能反映上下游径流特征的最优网络，在当前总共18个站点中需要12个水文站。
