An Optimization Model Of An Aquatic Carbon Sink:Supplementary Project At The Baltic Lake Based On Uncertain Conditions

Wetland is considered as an important carbon sink in the earth's surface system,playing an important role in absorbing greenhouse gases in the atmosphere and slowing down global warming.The process of photosynthesis is to transform inorganic carbon?carbon dioxide in the atmosphere,CO₂?into organic carbon in the form of plants.In a lot of ecosystems,plants are degraded and carbon is returned to the atmosphere in the form of CO₂.Wetlands cover a large number of undissolved organic substances.Therefore,they play the role of carbon pools,rather than carbon sources.Additionally,the burning of fossil fuels promotes the global warming.As a result,people pay more attention to increasing CO₂ in the atmosphere.Therefore,wetland is a global carbon sink.Once the wetland is destroyed,it will lead to global warming.Assessment of wetland carbon storage and carbon sink capacity remains a critical issue in the development of sustainable civilization in China,which is also a long-term concern in theoretical circles.Based on the current situation and characteristics of the Baltic Lake and by comprehensively considering the relevant factors,such as the social,economic,ecological and environmental benefits as well as the influence of uncertainties in the process of water replenishment,the present study employed the two-stage interval programming method to maximize the carbon sinks of Phragmites australis wetland and marsh wetland.Besides,this study also established a project to investigate carbon replenishment of the Baltic Lake based on uncertainties.With the maximum carbon sink capacity,the optimization model was used to obtain the optimal scheme of ecological water replenishment for the Baltic Lake.According to the results,on the premise of providing social,economic,ecological and environmental benefits,the upper limit values of the average annual absorbable fixed carbon dioxide in wetlands under dry and flat scenarios were [15239.35,35788.16] t and [19024.30,37232.18] t,which were 73.73% and 80.74% higher than the recommended values,respectively.The quantity of wetland was [20916.77,37893.11] t.In addition,the upper and lower limits were elevated by 1.54% and 83.95%,respectively.The maximum production potential of wetlands was fully utilized,providing technical support for maximizing the utilization of wetland resources and mitigating the greenhouse effect.