[논문]3차원 수리·수질 모델을 이용한 대청호 유기탄소 순환 및 물질수지 해석

안인경; 박형석; 정세웅; 류인구; 최정규; 김지원

doi:10.15681/kswe.2020.36.4.284

3차원 수리·수질 모델을 이용한 대청호 유기탄소 순환 및 물질수지 해석
Analysis of Organic Carbon Cycle and Mass Balance in Daecheong Reservoir using Three-dimensional Hydrodynamic and Water Quality Model 원문보기

한국물환경학회지 = Journal of Korean Society on Water Environment, v.36 no.4, 2020년, pp.284 - 299

안인경 (충북대학교 환경공학과) , 박형석 (충북대학교 환경공학과) , 정세웅 (충북대학교 환경공학과) , 류인구 (국립환경과학원 한강물환경연구소) , 최정규 (한국수자원공사 물환경처) , 김지원 (한국수자원공사 물환경처)

Abstract ▼ AI-Helper

Dam reservoirs play a particularly crucial role in processing the allochthonous and the autochthonous dissolved (DOC) and the particulate (POC) organic carbon and in the budget of global carbon cycle. However, the complex physical and biogeochemical processes make it difficult to capture the temporal and spatial dynamics of the DOC and the POC in reservoirs. The purpose of this study was to simulate the dynamics of the DOC and the POC in Daecheong Reservoir using the 3-D hydrodynamics and water quality model (AEM3D), and to quantify the mass balance through the source and sink fluxes analysis. The AEM3D model was calibrated using field data collected in 2017 and showed reasonable performance in the water temperature and the water quality simulations. The results showed that the allochthonous and autochthonous proportions of the annual total organic carbon (TOC) loads in the reservoir were 55.5% and 44.5%, respectively. In season, the allochthonous loading was the highest (72.7%) in summer, while in autumn, the autochthonous loading was the majority (77.1%) because of the basal metabolism of the phytoplankton. The amount of the DOC discharged to downstream of the dam was similar to the allochthonous load into the reservoir. However, the POC was removed by approximately 96.6% in the reservoir mainly by the sedimentation. The POC sedimentation flux was 36.21 g-C/㎡/yr. In terms of space, the contribution rate of the autochthonous organic carbon loading was high in order of the riverine zone, the transitional zone, and the lacustrine zone. The results of the study provide important information on the TOC management in the watersheds with extensive stagnant water, such as dam reservoirs and weir pools.

주제어

표/그림 (19)

그림 Fig. 1. Location of the study site and monitoring stations.
표 Table 1. Water quality conditions of the study sites during the study period
표 Table 2. Hydrodynamic equations in AEM3D
그림 Fig. 2. Simplified schematic of the carbon dynamics.
그림 Fig. 3. Numerical grid system in Dae-cheong reservoir.
표 Table 3. AEM3D carbon cycle
그림 Fig. 4. Comparison of simulated reservoir water level and capacity curve with observed one.
표 Table 4. Data collection sites
표 Table 5. Calibrated model parameter values for phytoplankton, carbon, light and organic matter
그림 Fig. 5. Comparison of observed and simulated water level.
그림 Fig. 6. Comparison of observed and simulated water temperature profiles at DC2.
그림 Fig. 7. Comparison of simulated Chl-a and TOC with observed data at DC2 ((a) and (b)), DC5 ((c) and (d)), and DC4 ((e) and (f)).
그림 Fig. 8. Mass balance of organic carbon in Daecheong reservoir. The numbers in parentheses indicate the initial value.
표 Table 6. Estimates of total organic carbon budget in Daecheong reservoir
그림 Fig. 9. Daily fluctuations of (a) inflow and outflows, and (b) percentage of allochthonous load and autochthonous.
그림 Fig. 10. Seasonal loading of allochthonous and autochthonous organic carbon.
그림 Fig. 11. Daily loading rate of (a) DOC, (b) POC, (c) TOC by contributing factors, and (d) monthly loading rate of TOC by contributing factors.
그림 Fig. 12. Spatial distribution of Chl-a, TOC, DOCR and POCR concentration.
표 Table 7. Average contributing factors of TOC by site

질의응답

핵심어	질문	논문에서 추출한 답변
	식물플랑크톤의 일차생산은 어떤 과정이자, 무엇의 원인이 되나요?	식물플랑크톤의 일차생산은 수체 내 유기물을 공급하는 가장 기초적인 과정이자, 부영양화된 호소에 유기탄소를 공급하는 주요 원인이 된다(Jonsson et al., 2001; Kim et al.
	TOC는 무엇에 따라 어떻게 구분되나요?	TOC는 수체 내에 존재하는 성상에 따라 용존성 유기탄소(Dissolved organic carbon, DOC)와 입자성 유기탄소(Particulate organic carbon, POC)로 구분된다. 일반적으로 하천과 호소에서는 대부분 DOC 형태로 존재하며 POC는 총 유기물의 10∼17% 정도이다(Keskitalo and Eloranta, 1999; Kim et al.
	AEM3D는 무엇에 관련해서 어떤 장점이 있나요?	AEM3D는 범용 3차원 수리-수질 모델로써 수리-수질-생태의 연동 해석(Coupled modeling)이 가능하다. 식물플랑크톤 모의와 관련해서는 조류 종을 7가지로 구분하여 시간적 천이특성을 해석할 수 있고, 남조류의 부력조절 기능을 모의 할 수 있는 장점이 있다.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

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