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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Ecology and Resilient Infrastructure
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Journal DOI :
Korean Society of Ecology and Infrastructure Engineering
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Volume & Issues
Volume 1, Issue 2 - Oct 2014
Volume 1, Issue 1 - Mar 2014
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Effects of Habitat Disturbance on Fish Community Structure in a Gravel-Bed Stream, Korea
Kim, Seog Hyun ; Lee, Wan-Ok ; Cho, Kang-Hyun ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 49~60
DOI : 10.17820/eri.2014.1.2.049
Fish assemblages play an integral role in stream ecosystem and are influenced by stream environmental conditions and habitat disturbances. Fish community structures and habitat parameters of U.S. EPA rapid bio-assessment protocol were surveyed to investigate the effect of stream environment and habitat disturbance on fish communities at 13 study sites in the Gapyeong Stream, a typical gravel-bed stream. Principal component analysis (PCA) based on data from habitat assessment at each study site indicated that the study sites were differentiated by habitat parameters such as embeddedness, velocity/depth regime and sediment deposition, which were related with bed slope. A total of 46 species belonging to 12 families were collected in the Gapyeong Stream. A dominant species was Zacco koreanus, subdominant species was Z. platypus. Hierarchical cluster analysis based on species abundance classified fish communities into the three main groups along the stream longitudinal change. Non-metric multidimensional scaling (NMDS) portrayed that fish community structures were related to major habitat parameters, i.e., epifaunal substrate/available cover, embeddedness, velocity/depth regime, sediment deposition, channel alternation and frequency of riffles. These results suggested that fish community structures were primary affected by the longitudinal environmental changes, and those were modified by habitat disturbance in the Gapyeong Stream, a gravel-bed stream.
Change of Fish Habitat in a Downstream Reach of a Stream Due to Dam Construction
Kim, Seung Ki ; Choi, Sung-Uk ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 61~67
DOI : 10.17820/eri.2014.1.2.061
Dam construction changes flow regime and stream morphology in the downstream reach. These affect the ecosystem of downstream reach. This study provides the assessment of the impact of dam construction on the downstream fish habitat. For this, physical habitat simulations are carried out. The quasi-steady model is used for hydraulic simulation, The hydraulic model used in the present study is capable of simulating the morphological change due to sediment transport. The change of the fish habitat condition is investigated using the flow scenarios before and after the dam construction. Simulation results indicate that the habitat suitability decreases frequently due to hydropeaking after dam construction. In addition, erosion is expected to occur in a reach downstream of dam. This is a long term effect due to the shut-down of sediment supply from the upstream reach.
Numerical Experiments of Vegetation Growth Effects on Bed Change Patterns
Kim, Hyung Suk ; Park, Moon Hyeong ; Woo, Hyo Seop ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 68~81
DOI : 10.17820/eri.2014.1.2.068
In this study, the numerical simulation regarding the process and characteristics of topography change due to the vegetation recruitment and growth was carried out by adding the vegetation growth model to two-dimensional flow and sediment transport models. The vegetation introduction and recruitment on the condition for developing an alternate bar reduced the bar migration. The vegetated area and channel width changes were more significantly influenced by changes in upstream discharge rather than the duration of low flow. When the upstream discharge decreased, the vegetation area increased and the channel width decreased. The vegetation introduction and recruitment on the condition for developing a braided channel significantly influenced the characteristics of topography changes. In the braided channel, vegetation reduced the braided index, and when the upstream discharge decreased significantly, the channel topography was changed from the braided channel to the single channel. The vegetation area decreased as the upstream discharge increased. The channel width decreased significantly after the vegetation was introduced and it also decreased as the upstream discharge decreased. It was confirmed through the numerical simulation that a decrease in flood discharge accelerated the vegetation introduction and recruitment in the channel and this allowed to confirm its influence on the characteristics of topography changes qualitatively.
The Classification of Instream Habtats for Ecological River Restoration
Ahn, Hong Kyu ; Lee, Dong Jun ; Kim, Si Nae ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 82~93
DOI : 10.17820/eri.2014.1.2.082
In recent years, "ecological river restoration" taking into account the flood control, water utilization and environmental aspects of rivers is actively being investigated. However, it is hard to understand the inhabitation conditions of living organisms that live on the river with distinct characteristics have been fully reflected, and with the use of limited methods, it ends in uniformed composition of artificial rivers and a mere customary stream channel maintenance, resulting in frequently disturbed stream channel habitats As a fundamental study for investigating the habitats of living organisms that live on rivers, this study intends to examine each habitat type by dividing domestic rivers into sand rivers and gravel rivers depending on the nature of rivers and dividing sections of each river into central river sections and natural river sections. As a result, more diverse habitat types of organisms were found in the gravel rivers rather than in the sand rivers, and the habitat types of organisms in the central river sections where the river restoration project have been already conducted reached approximately 56.3 % of those that appeared in the natural river sections.
Public Administration Town Plan of Sejong-City based on Landscape Ecological Perspectives
Lee, Ai-Ran ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 94~101
DOI : 10.17820/eri.2014.1.2.094
This is the urban design master plan for the Public Administration Town. The project proposes a newly configured city, where environmental and democratic principles are expressed in the shape of the urban fabric. To achieve the goal, the concepts of `Flat City, Link City, and Zero City` were introduced. These concept show "Space fabric arrange, connection and material circulation and flow from ecological landscape". `Flat City` shaped the government buildings into an iconic plane, and democratic society. The iconic plane`s surface extends across the whole city, creating an expansive public park, which is easily accessible, and open to nature. `Link City` connects governmental agencies to enhance their function and interactions. Government facilities, parks and green spaces, cultural facilities, commercial zones, and residential districts areas create an interconnecting network. `Zero City` has integrated infrastructure systems to reuse waste, reduce pollution, and provide essential city functions. It creates a new wildlife habitat, making `Zero City` a good neighborhood. This proposal was made to integrate historical, regional, nature experiences with various approaches in architecture, city, and landscape architecture.
Analysis for Removal Efficiency of Non-point Pollution Sources by Constructed Wetlands
Lee, Sang Hyuk ; Kim, Lee Hyung ; Cho, Hye Jin ;
Ecology and Resilient Infrastructure, volume 1, issue 2, 2014, Pages 102~108
DOI : 10.17820/eri.2014.1.2.102
Studies of non-point pollutant treatment facilities have widely been conducted for a decade, but natural non-point pollutant treatment facilities implemented on roads have not been carried out for the removal efficiency of non-point pollution sources. This study analyzed the removal efficiency of non-point pollution sources from constructed wetlands using monitoring and event mean concentration method. As a result of this study, removal efficiency of general non-point pollution sources as TSS, COD, BOD is relatively good, but removal efficiency of TN, TP, Cr, Zn, Pb is very small or nothing.