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Dongke Lv,Yuqi Wang,Li Jia 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.7
Using the static chamber method, CO2 flux across the water-air interface of Xiquanyan reservoir was measured for 24 hours over a one-year cycle in Harbin, China. Gas ebullition and gas emission in winter was not considered in this study. CO2 fluxes showed significant spatial-temporal differentiation. The order of CO2 flux in each test point was: A> C> D> B. The changes of water level and hydro-fluctuation zone and the distribution of aquatic plants were the main factors affecting the spatial variation of CO2 flux. In terms of time, carbon flux of daytime in Xiquanyan was significantly lower than the night. Overall, seasonal variations of CO2 flux was: spring> autumn> summer.
Forecasting on Ecological Security of Zhalong Wetland Nature Reserve based on Gray Theory
Yuqi Wang,Dongke Lv,Zhenglin Sun 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.8
Based on field survey data and statistics of Zhalong wetland natural reserve, gray correlation model was used to comprehensively analyze and forecast ecological security of zhalong. According to “Response -Pressure - State" model, a eco-security assessment system was built which contains 32 indictors such as human activities, regional development index, etc. The results showed that: Zhalong Wetland ecological security index varied from 0.6852-0.7951 from 2015-2022. The index of ecological security alternated "safer" from "early warning". Upward trend of ecological security benefited from implementation of policies from the response subsystem.
Yuqi Wang,Dongke Lv,Zhenglin Sun 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
According to “Pressure - State – Response” model, an eco-security assessment system was built which contains 32 indictors such as human activities, regional development index, etc. The results showed that: ecological security index of Zhalong Wetland Nature Reserve, appeared upward trend after the first drop in overall, but were all in warning category from 2007 to 2012. As for subsystem level, since 2007, pressure subsystem showed worsening trend, while the state and response subsystem appeared signs of improvement.