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http://dx.doi.org/10.3741/JKWRA.2022.55.12.999

Analysis of the effect of long-term water supply improvement by the installation of sand dams in water scarce areas  

Chung, Il-Moon (Korea Institute of Civil Engineering and Building Technology)
Lee, Jeongwoo (Korea Institute of Civil Engineering and Building Technology)
Lee, Jeong Eun (Korea Institute of Civil Engineering and Building Technology)
Kim, Il-Hwan (Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korea Water Resources Association / v.55, no.12, 2022 , pp. 999-1009 More about this Journal
Abstract
The Chuncheon Mullori area is an underprivileged area for water welfare that does not have a local water supply system. Here, water is supplied to the village by using a small-scale water supply facility that uses underground water and underground water as the source. To solve the problem of water shortage during drought and to prepare for the increasing water demand, a sand dam was installed near the valley river, and this facility has been operating since May 2022. In this study, in order to evaluate the reliability of water supply when a sand dam is assumed during a drought in the past, groundwater runoff simulation results using MODFLOW were used to generate inflow data from 2011 to 2020, an unmeasured period. After performing SWAT-K basin hydrologic modeling for the watershed upstream of the existing water intake source and the sand dam, the groundwater runoff was calculated, and the relative ratio of the monthly groundwater runoff for the previous 10 years to the monthly groundwater runoff in 2021 was obtained. By applying this ratio to the 2021 inflow time series data, historical inflow data from 2011 to 2020 were generated. As a result of analyzing the availability of water supply during extreme drought in the past for three cases of demand 20 m3/day, 50 m3/day, and 100 m3/day, it can be confirmed that the reliability of water supply increases with the installation of sand dams. In the case of 100 m3/day, it was analyzed that the reliability exceeded 90% only when the existing water intake source and the sand dam were operated in conjunction. All three operating conditions were evaluated to satisfy 50 m3/day or more of demand based on 95% reliability of water supply and 30 m3/day or more of demand based on 99% of reliability.
Keywords
Water supply capacity; Sand dam; Reliability; Drought; SWAT-K;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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