Characterizing the Impact of River Barrage Construction on Stream-Aquifer Interactions, Korea
- Authors
- Oh, Yun-Yeong; Hamm, Se-Yeong; Ha, Kyoochul; Yoon, Heesung; Chung, Il-Moon
- Issue Date
- 4월-2016
- Publisher
- MDPI
- Keywords
- stream-aquifer interaction; flood event; floodwave propagation; river resistance; hydraulic diffusivity; Fourier transform
- Citation
- WATER, v.8, no.4
- Indexed
- SCIE
SCOPUS
- Journal Title
- WATER
- Volume
- 8
- Number
- 4
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/89054
- DOI
- 10.3390/w8040137
- ISSN
- 2073-4441
- 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 (a) 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 a 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.
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