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Environmental Earth Sciences

, Volume 71, Issue 4, pp 1521–1532 | Cite as

Availability of coastal groundwater discharge as an alternative water resource in a large-scale reclaimed land, Korea

  • Byung Sun Lee
  • Sung-Ho SongEmail author
  • Jin Sung Kim
  • Jae Yeon Um
  • Kyoungphile Nam
Original Article

Abstract

This study was conducted to identify the availability of coastal groundwater discharge (CGD), subsurface fluids flowing from inland through the coastal area to sea, as an alternative water resource for a large-scale reclaimed land. The behaviors of stable isotopes indicated that groundwater originated from inland precipitation and traveled as CGD along the coast line. Most of the groundwater samples collected from domestic wells installed along the old coast line were considered to be relatively fresh from the correlation analysis among chemical constituents. The average electrical conductivity (EC) values of the samples were identified as averaging 1,125–1,297 μS cm−1, corresponding to appropriate crop growth. A weathered-rock layer in a small catchment within the reclaimed land was proved to be a main CGD pathway, with electrical resistivity anomalies ranging from 7 to 14 Ω m. Five monitoring wells were placed in this catchment to delineate the occurrence of CGD. Long-term vertical EC profiling results for the monitoring wells indicated that CGD occurs within a depth of 30 m below the ground surface. Annual monitoring data for groundwater level and EC demonstrated that the water quality of CGD was improved by introducing fresh terrestrial groundwater. A remarkable improvement in water quality (EC decrease of 900–1,600 μS cm−1) of CGD was observed during the saline water pumping test that explains how CGD could be an alternative water resource for the reclaimed land.

Keywords

Coastal groundwater discharge (CGD) The large-scale reclaimed land Electrical conductivity Monitoring wells 

Notes

Acknowledgments

This research was partially supported by a grant (10-RITP-B02) from the Regional Innovative Technology Program funded by the Korean MLIT (Ministry of Land, Infrastructure, and Transport) Affairs. The authors thank the Engineering Research Institute at Seoul National University for their technical assistance.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Byung Sun Lee
    • 1
    • 2
  • Sung-Ho Song
    • 1
    Email author
  • Jin Sung Kim
    • 1
  • Jae Yeon Um
    • 1
  • Kyoungphile Nam
    • 2
  1. 1.Rural Research Institute, Korea Rural Community CorporationAnsanKorea
  2. 2.Department of Civil and Environmental EngineeringSeoul National UniversitySeoulKorea

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