CAJ | 학술논문

基于室内物理模拟实验，对长江沉积物进行淡水和海水环境下沉积物搬运过程碳释放通量实验模拟。结果表明，模拟实验初期，淡水和海水均为大气 CO2的源，但淡水 CO2释放通量略高于海水；淡水、海水两种环境下， CH4释放通量均较小，为弱释放-弱吸收过程。对两种环境下碳通量对比研究发现， Eh值可能是造成淡水和海水环境下CO2通量差别的主要原因，而pH值可能对CO2通量差别的影响较小。两种环境下温室气体通量差别的具体原因仍需进一步研究。通过模拟对比试验，旨在为系统地认识长江流域水库的温室效应与减排提供科学依据，为我国清洁水电能源发展提供理论参考。
기우실내물리모의실험，대장강침적물진행담수화해수배경하침적물반운과정탄석방통량실험모의。결과표명，모의실험초기，담수화해수균위대기 CO2적원，단담수 CO2석방통량략고우해수；담수、해수량충배경하， CH4석방통량균교소，위약석방-약흡수과정。대량충배경하탄통량대비연구발현， Eh치가능시조성담수화해수배경하CO2통량차별적주요원인，이pH치가능대CO2통량차별적영향교소。량충배경하온실기체통량차별적구체원인잉수진일보연구。통과모의대비시험，지재위계통지인식장강류역수고적온실효응여감배제공과학의거，위아국청길수전능원발전제공이론삼고。
Using laboratory physical simulation experiment we investigated the carbon release fluxes in the Changjiang River sediment in the seawater environment and the freshwater environment, respectively. The results showed that the atmospheric CO2 came from freshwater and seawater, and the release fluxes of CO2 in freshwater were higher than that in seawater. In both these two environments, the release fluxes of CH4 were small, at the same time, the uptake fluxes of CH4 were small, too. By comparison of the carbon fluxes in these two environments, we found that the variation of Eh values was possibly a most important factor attributing to the difference in fluxes of CO2. On the contrary, the variation of pH values possibly had little influence on the difference of CO2 fluxes . The concrete reasons which caused the difference in greenhouse gas fluxes in these two environments should be further studied. The results of laboratory physical simulation experiment, are very helpful to understanding of the greenhouse effect of the reservoir in the Changjiang River basin and provide a scientific basis for emission reduction, and provide theoretical reference for clean water and electricity energy development in China.