2021, Vol.30, No.1

Identification of Freshwater Fish Species in Korea Using Environmental DNA Technique – From the Experiment at the Freshwater Fish Ecological Learning Center in Yangpyeong, Gyeonggi Do –

김가우 , Youngkeun Song | 2021, 30(1) | pp.1~12 | number of Cited : 8

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Prediction Study on Major Movement Paths of Otters in the Ansim-wetland Using EN-Simulator

Geehoon Shin

, Seo Boyong

, Paikho Rho

and 2 other persons | 2021, 30(1) | pp.13~23 | number of Cited : 0

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In this study, we performed a Random Walker analysis to predict the Major Movement Paths of otters. The scope of the research was a simulation analysis with a radius of 7.5 km set as the final range centered on the Ansim-wetland in Daegu City, and a field survey was used to verify the model. The number of virtual otters was set to 1,000, the number of moving steps was set to 1,000 steps per grid, and simulations were performed on a total of 841 grids. As a result of the analysis, an average of 147.6 objects arrived at the boundary point under the condition of an interval of 50 m. As a result of the simulation verification, 8 points (13.1%) were found in the area where the movement probability was very high, and 9 points (14.8%) were found in the area where the movement probability was high. On the other hand, in areas with low movement paths probabilities, there were 8 points (13.1%) in low areas and 4 points (6.6%) in very low areas. Simulation verification results In areas with high otter values, the actual otterformat probability was particularly high. In addition, as a result of investigating the correlation with the otter appearance point according to the unit area of the evaluation star of the movement probability, it seems that 6.8 traces were found per unit area in the area where the movement probability is the highest. In areas where the probability of movement is low, analysis was performed at 0.1 points. On the side where otters use the major movement paths of the river area, the normal level was exceeded, and as a result, in the area, 23 (63.9%), many form traces were found, along the major movement paths of the simulation. It turned out that the actual otter inhabits. The EN-Simulator analysis can predict how spatial properties affect the likelihood of major movement paths selection, and the analytical values are used to utilize additional habitats within the major movement paths. It is judged that it can be used as basic data such as to grasp the danger area of road kill in advance and prevent it.

Network Analysis of Domestic and Foreign Marine Ecosystem Management Plans

Sehwa Jeong

, KIM YEONG HA

, Unsang Yeo

and 1 other persons | 2021, 30(1) | pp.24~34 | number of Cited : 0

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Field Assessment of in Situ Remediation of NO3 –contaminated Ground Water Using Zero-valent Iron/Bio Composite Media

Wan-Ho Joo

, YOON-YOUNG CHANG

| 2021, 30(1) | pp.35~48 | number of Cited : 1

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In this study, the assessment of field applicability of in-situ remediation of nitratecontaminated groundwater located in Yesan-gun was performed. Zero-valent iron/bio composite media injected PRB (Permeable Reactive Barrier) and monitoring well were installed in the contaminated groundwater site and monitored main remediation indicators during the PRB operation. Nitrate, nitrite, ammonia, Fe ion, TOC, and turbidity were analyzed and the diversity and population of microorganism in the PRB installed site were investigated for the verification of effect of injected PRB. In the study site where is an agricultural area, a river flows from west to east that forms a river boundary and the southern area has an impermeable sector. It was found that nitrate flows into the river, which is similar as groundwater flow. Simulation result for the fate of nitrate in groundwater showed steady state of nitrate arrived after 3~5 years passed. However, it is just to consider current conditions with no additional input of contaminant source, if additional input of contaminant source occurs contamination dispersion and time for steady state are expected to be increased. The monitoring results showed that Fe ion, TOC and turbidity in groundwater were not clearly changed in concentration after PRB installation, which indicates adaptability of the injected PRB for remediation of groundwater with no additional harmful effect to water quality. The concentration of nitrate maintained less than 5mg/L until 42 days after PRB installation and recovered its initial concentration after 84 days passed and showed termination of reactivity of injected zero-valent iron/bio composite media forremoval nitrate. Nitrite and ammonia ions found after installation of PRB indicates reductive removal of nitrate. And the outstanding increase of microorganism diversity and population of Betaproteobacteria Class which includes denitrification microorganism explains biologically reductive removal of nitrate in injected PRB.

Survey on the Perception of Stakeholders on the EIA System in Korea

Kim, Minkyung , Lee, Sang-Don

| 2021, 30(1) | pp.49~60 | number of Cited : 3

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KJCKorea
Journal Central

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

2021, Vol.30, No.1