HSPF-EFDC 연계모형을 활용한 간월호 염분 농도 분석 및농업용수 적합성 평가
Analysis of Ganwol Estuarine Reservoir Salinity Using HSPF-EFDC Coupled Model and Evaluation of its Suitability for Agricultural Water Use
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study employed a coupled HSPF-EFDC model to examine the three-dimensional salinity distribution within the Ganwol estuarine reservoir andassess 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 andvalidation indicated generally satisfactory performance, although some discrepancies were observed during low-flow periods. Results showed that thereservoir's salinity was primarily affected by river inflows, seasonal variations, and potential seepage through the barrage or floodgates. According toFAO salinity thresholds, median salinity levels at various pumping stations generally fell into the “Slight to Moderate” restriction category for fieldcrops, with outliers occasionally reaching “Severe” levels. For rice, median salinity levels in most stations were sufficient to maintain 75–100% yieldpotential, yet extreme salinity events could reduce yields by over 50%. These findings underscore the necessity for comprehensive managementstrategies—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 productivityand sustainable water resource utilization in reclaimed areas
Abstract
This study employed a coupled HSPF-EFDC model to examine the three-dimensional salinity distribution within the Ganwol estuarine reservoir andassess 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 andvalidation indicated generally satisfactory performance, although some discrepancies were observed during low-flow periods. Results showed that thereservoir's salinity was primarily affected by river inflows, seasonal variations, and potential seepage through the barrage or floodgates. According toFAO salinity thresholds, median salinity levels at various pumping stations generally fell into the “Slight to Moderate” restriction category for fieldcrops, with outliers occasionally reaching “Severe” levels. For rice, median salinity levels in most stations were sufficient to maintain 75–100% yieldpotential, yet extreme salinity events could reduce yields by over 50%. These findings underscore the necessity for comprehensive managementstrategies—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 productivityand sustainable water resource utilization in reclaimed areas