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Water 2016, 8(4), 137; doi:10.3390/w8040137

Characterizing the Impact of River Barrage Construction on Stream-Aquifer Interactions, Korea

1
Division of Earth Environmental System, Pusan National University, Busan 609-735, Korea
2
Korea-CO2 Storage Environmental Management (K-COSEM) Research Center, Department of Earth and Environmental Sciences, Korea University, Seoul 136-701, Korea
3
Groundwater Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 305-350, Korea
4
Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 411-712, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Keith Smettem
Received: 4 November 2015 / Revised: 31 March 2016 / Accepted: 1 April 2016 / Published: 7 April 2016
(This article belongs to the Special Issue New Developments in Methods for Hydrological Process Understanding)
View Full-Text   |   Download PDF [3141 KB, uploaded 7 April 2016]   |  

Abstract

This study investigated changes in stream–aquifer interactions during the period shortly after the construction of the Changnyeong-Haman River barrage (CHRB) on the Nakdong River in South Korea. The hydraulic diffusivity (α) and river resistance (R) values at the semipervious stream–aquifer interface were estimated by using a one-dimensional (1-D) analytical solution with Fourier transform (FT). Prior to the application of the 1-D analytical solution, the noise effects on the groundwater levels were removed by using fast Fourier transform and low-pass filtering techniques. Sinusoidal variation of the river stages was applied to the 1-D analytical solution. For the study period, the R values showed a decreasing trend, while the α values showed an increasing trend, and results showed that the average of the median values of flood duration times (td) and flood amplitudes were reduced to 78% and 59%, respectively. Moreover, the ratio of flood peak time to td demonstrated a decreasing tendency after the construction of the CHRB. Hence, it is concluded that the dredging and increase of river-water storage due to CHRB construction enhanced stream–aquifer interactions during the period shortly after the construction of the CHRB. View Full-Text
Keywords: stream-aquifer interaction; flood event; floodwave propagation; river resistance; hydraulic diffusivity; Fourier transform stream-aquifer interaction; flood event; floodwave propagation; river resistance; hydraulic diffusivity; Fourier transform
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Oh, Y.-Y.; Hamm, S.-Y.; Ha, K.; Yoon, H.; Chung, I.-M. Characterizing the Impact of River Barrage Construction on Stream-Aquifer Interactions, Korea. Water 2016, 8, 137.

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