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2025 Vol.67, Issue 1 Preview Page
Analysis of Ganwol Estuarine Reservoir Salinity Using HSPF-EFDC Coupled Model and Evaluation of its Suitability for Agricultural Water Use

HSPF-EFDC 연계모형을 활용한 간월호 염분 농도 분석 및 농업용수 적합성 평가

Jaeyoung Ana
,
Sinae Kimb
,
Soonho Hwangc
,
Seongjae Parka
,
Seoju Oha
,
Jihye Kwakb
,
Jihye Kimd
,
Jung-Hun Songe
,
Moon-Seong Kangf†
안 재영a
,
김 시내b
,
황 순호c
,
박 성재a
,
오 서주a
,
곽 지혜b
,
김 지혜d
,
송 정헌e
,
강 문성f†
aM.S. Student, Department of Rural Systems Engineering, Seoul National University
bPh.D. Student, Department of Rural Systems Engineering, Seoul National University
cResearch Scholar, Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign
dResearcher, Research Institute of Agriculture and Life Sciences, Seoul National University
eAssistance Professor, Department of Agricultural and Rural Engineering, Chungnam National University
fProfessor, Department of Rural Systems Engineering, Research Institute of Agriculture and Life Sciences, Institutes of Green Bio Science and Technology, Seoul National University
†Corresponding author Tel.: +82-2-880-4582, Fax: +82-2-873-2087 E-mail: mskang@snu.ac.kr
2025. pp. 77-91
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Abstract

This study employed a coupled HSPF-EFDC model to examine the three-dimensional salinity distribution within the Ganwol estuarine reservoir and assess the suitability of its water for field crops and rice cultivation. The HSPF model was used to calculate river inflows from the upstream watershed, which subsequently served as boundary conditions for the EFDC model to simulate water levels and spatial salinity distributions. Model calibration and validation indicated generally satisfactory performance, although some discrepancies were observed during low-flow periods. Results showed that the reservoir's salinity was primarily affected by river inflows, seasonal variations, and potential seepage through the barrage or floodgates. According to FAO salinity thresholds, median salinity levels at various pumping stations generally fell into the “Slight to Moderate” restriction category for field crops, with outliers occasionally reaching “Severe” levels. For rice, median salinity levels in most stations were sufficient to maintain 75–100% yield potential, yet extreme salinity events could reduce yields by over 50%. These findings underscore the necessity for comprehensive management strategies—such as monitoring seawater intrusion and investigating crop varieties more resilient to salinity—to optimize agricultural water use. Overall, this study provides foundational information for effective salinity management in estuarine reservoirs, contributing to improved agricultural productivity and sustainable water resource utilization in reclaimed areas.

Keywords
Estuarine reservoir
salinity
EFDC
agricultural water
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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 67
  • No :1
  • Pages :77-91
  • Received Date : 2024-09-03
  • Revised Date : 2024-12-31
  • Accepted Date : 2025-01-03
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