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Jaffe, Peter R.,Park,Seok S. 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-
A numerical model was developed to simulate the vertical profile of the redox potential in the benthic sediments. The benthic sediments were subdivided vertically into six zones, each with different microbial and chemical reactions: aerobic respiration, denhtrification, managanese reducation, iron reducation, sulfate reduction, and methanogenesis. Microbial degradation of organic matter and subsequent chemical reactions of interest were formulated using stoichiometric relationships and considering the vertical advective/dispersive transport in the sediments. The kinetics of utilization of the different electron acceptors during the biodegradation of the organic matter were described by Monod-type formulation. Eleven coupled differential equations were derived and solved interactively utilizing an iterative multistep numerical method. The model input parameters include the rate of solid deposition, concentrations of electron acceptors in the water overlaying the sediments, activities of the benthic fauna, and molecular diffusion. The model simulates the redox potential as well as eleven chemical constituents in the sediments, three solids(particulate organic matter, manganese oxide, and iron oxide), and eight dissolved species(oxygen, nitrate, sulfate, ammonia, dissolved manganese, dissolved iron, sulfide and methane). The model demonstrated that accurate estimates of the flux of primary electron acceptors and donors from the overlying water to the benthic sediments is important to determine the redox conditions in sediments. Bioturbation and the rate of pore-water infiltration are processes that have a major influence on this flux.
Auto-guiding Performance from IGRINS Test Observations (Immersion GRating INfrared Spectrograph)
Hye-In Lee,Soojong Pak,Huynh Anh N.Le,Wonseok Kang,Gregory Mace,Michael Pavel,Daniel T.Jaffe,Jae-Joon Lee,Ueejeong Jeong,Michael Pavel,Daniel T.Jaffe,Jae-Joon Lee,Ueejeong Jeong,Moo-Young Chun,Chan Pa 한국천문학회 2014 天文學會報 Vol.39 No.2