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Assessment of a Stream Gauge Network Using Upstream and Downstream Runoff Characteristics and Entropy

1
Department of Civil Engineering, Inha University, Incheon 22212, Korea
2
Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(7), 673; https://doi.org/10.3390/e21070673
Received: 12 April 2019 / Revised: 30 June 2019 / Accepted: 7 July 2019 / Published: 10 July 2019
(This article belongs to the Section Information Theory, Probability and Statistics)
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Abstract

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. View Full-Text
Keywords: stream gauge network; entropy theory; unit hydrograph; runoff characteristic stream gauge network; entropy theory; unit hydrograph; runoff characteristic
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Joo, H.; Jun, H.; Lee, J.; Kim, H.S. Assessment of a Stream Gauge Network Using Upstream and Downstream Runoff Characteristics and Entropy. Entropy 2019, 21, 673.

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