• 대한토목학회논문집
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• 제33권3호
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• pp.947-956
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• 2013

본 연구에서는 낙동강-금호강 합류부의 생태유량을 산정하기 위해 2차원 수치모형 River2D를 이용하여 가중가용면적(WUA, Weighted Usable Area)을 계산했다. River2D 모형의 검증을 위해 HEC-RAS모의결과와 비교하여 최적 매개변수를 결정했다. 그리고 낙동강의 우점종인 피라미와 갈겨니를 대상으로 낙동강과 금호강의 유량을 변화시키며 가중가용면적을 모의했다. 유량-WUA/A의 그래프로부터 생태유량을 산정한 결과, 낙동강의 경우 $33.3m^3/s{\sim}40.0m^3/s$, 금호강의 경우 $3.60m^3/s{\sim}4.32m^3/s$를 낙동강-금호강 합류부의 생태유량으로 결정하였다. 결정된 생태유량을 적용하여 낙동강 본류의 하상준설 이후 피라미와 갈겨니의 가중가용면적을 계산한 결과, 가중가용면적이 약 1/9로 감소했다. 그리고 준설 이후에 잉어에 대한 가중가용면적은 피라미와 갈겨니에 대한 것보다 2~3배 더 큰 것으로 계산됐다.

• 한국조경학회지
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• 제30권5호
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• pp.98-106
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• 2002

This study was designed to present a river model with the aim of restoring the ecosystem and improving the landscape along the urban rivers on the basin of the Namhanl river, a core life channel for the National Capital regin. The revelation of botanical status, transition trend and correlation of plants might lead to providing the urban river restoration projects and ecological river formation projects with basic data for a model of ideal aquatic ecology and landscape. The outcomes of this study could be summed up as follows: 1. The plant communities of river flora found on the basin of the Namhan river could be categorized largely into 39 plant communities 2. Most diverse plants were distributed in the rivers lower reaches such as Unsim-ri where the protected zone of Paldang reservoir for city water borders the body of Jodae swamp where natural streams flow nearby. 3. One of the greatest threats to the biomass of the River Namhan is that the communities of such invasive alien plants as Panicum dichotomiflorum and Ambrosia artemisiifolia var. elatior dominate most parts of the area, a fact that has resulted in a reduced variety of plants and will, sooner or later, be likely to cause an ecological imbalance in the hitherto healthy Aquatic plant life. It is highly advisable to gradually diversify the species of trees and to return the plants bark to their original state since, besides the naturalized plants, plantations afforested with Erigeron canadensis and Erigeron annuus stocks in buckwheat field, Robinia Pseudo-accacia in riverside forest, Pinus rigida in terrestrial forest on the river basin and Larix leptolepis are anticipated to act as interceptors of normal migrations of the fluvial and terrestrial ecosystems. Finally, it seems also desirable to continue to explore the relationship between fluvial and terrestrial ecologies with the purpose of building up a model of natural streams in urban areas based on the surveyed factors for plant life, soil and landscape and, moreover, on the forecasting for overall influences derived from the rotation upon the ecosystem.

• 한국환경복원기술학회지
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• 제21권5호
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• pp.61-79
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• 2018

The purpose of this study is to investigate the flora of Sohyeoncheon which is planned for ecological restoration and river maintenance from upstream to downstream, and also to collect the ecological data to cope with the change of the ecosystem of Sohyeoncheon. The numbers of vascular plants were summarized as 336 taxa including 82 families, 233 genera, 298 species, 1 subspecies, 33 varieties and 4 forms. The rare plants were 3 taxa including Aristolochia contorta Bunge, Prunus yedoensis Matsum.(planting) and Koelreuteria paniculata Laxmann. The Korean endemic plants were 4 taxa including Populus tomentiglandulosa T.B.Lee(planting), Lespedeza maritima Nakai, Forsythia koreana (Rehder) Nakai(planting) and Weigela subsessilis (Nakai) L.H.Bailey. The specific plants by floristic region were 15 taxa including 1 taxon of grade V, grade IV and grade II each, 4 taxa of grade III and 8 taxa of grade I. The naturalized plants were 60 taxa and the invasive alien plants were 3 taxa. The results of analysis by vertical structures showed that naturalized plants included 31 taxa of upstream, 53 taxa of midstream and 38 taxa of downstream. An analysis of crossing structures showed that 2 taxa of water channel, 3 taxa of low waterside, 41 taxa of high waterside and 48 taxa of bank.

• 한국습지학회지
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• 제16권4호
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• pp.327-333
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• 2014

하천 생태 기능 증대 등 하천복원을 위한 식생 조성 시 내침수성이 강한 식물을 도입해야 하며 이를 위해 침수기간에 따른 하천식물의 생육특성 연구가 반드시 필요하다. 따라서 본 연구에서는 버드나무속 식물을 대상으로 식물키, 엽수, 녹색정도, 건중량 등을 측정하여 내침수성 및 침수기간에 따른 성장률을 분석하였으며 탁수에 의한 침수실험 결과와 비교하였다. 실험 결과 갯버들, 버드나무, 왕버들 중 내침수성이 가장 강한 식물은 버드나무이며 정수 상태의 침수는 고탁수 침수보다 고사 가능성이 매우 낮았다. 또한 버드나무속 식물은 20일 이하의 침수 시 비침수 조건보다 식물의 생장에 도움을 주는 것으로 나타났다.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2007년도 임시총회 및 학술논문발표회
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• pp.16-19
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• 2007

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2010년 학술대회 논문집
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• pp.1-14
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• 2010

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2004년도 학술대회
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• pp.40-40
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• 2004

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2008년도 정기총회 및 학술논문발표회
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• pp.110-112
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• 2008

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.1239-1243
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• 2005

The water quality of the Ian Stream, a tributary of the Na14dong River, was estimated to provide an information in establishment of an ecological restoration plan for fan dam which will be constructed in near future. Seven stations were selected in upstream (3 stations) and downstream (4 stations) of Ian Stream, centering the construction site of Ian dam. Samples were collected at the surface water of 7 stations selected on May 1, June 16, and September 1 in 2004. The values of DO, pH, and BOD are satisfied Grade I for river water standard in nearly all sites. The concentrations of total nitrogen (TN) and total Phosphorus (TP) showed low level with ranges of $1.10\~2.25\;mgN/L,\;5\~14\;{\mu}gP/L$. However, the total and fecal conform bacteria were detected in nearly stations, especially high at the upstream stations. The number of fecal conform bacteria corresponds to the Grade III for river water standard. In addition, some metals (iron, manganese) were detected during dry season. As a consequence, general water quality of Ian Stream satisfied Grade I for river standard and it is expected that pollution loads from watershed is not significant. However, the detection of fecal conform, which is thought to be from livestock and residents, and some metals originating mimes watershed can have a potential health risk exists for aquatic organisms lived in Ian Stream. It needs to be solved by the construction of wastewater treatment plant to diminish the health risk from stream water polluted by fecal conform and metals, and to provide the safe ecological habitat for aquatic organisms.

• 한국환경복원기술학회지
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• 제26권6호
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• pp.1-19
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• 2023

This study aimed to identify the characteristics of the plant growth forms within the Amsa-dong Ecological and Landscape Conservation Area, a floodplain along the Han River, based on 20 years of flora monitoring data. The analysis revealed that there were 106 taxa identified in 2003, 158 taxa in 2006, 107 taxa in 2013, and 202 taxa in 2020. Compared to 2003 and 2013, the number of taxa increased significantly by approximately 50 taxa in 2006 and around 100 taxa in 2020. It is presumed that this is due to the influx of seeds caused by the flooding of the Han River due to record-breaking heavy rains during the rainy seasons of 2006 and 2020, leading to a rapid increase in the number of taxa. This was also confirmed in aquatic plants(HH) as a result of comparison of life style analysis by year. The analysis revealed that there were 19 aquatic plant(HH) in 2003, 32 aquatic plant(HH) in 2006, 9 aquatic plant(HH) in 2013, and 30 aquatic plant(HH) in 2020. The number of aquatic plants(HH) increased slightly in 2006 and 2020 compared to 2003 and 2013, and the influx of rare aquatic plants in urban rivers was confirmed. Consistent with the results of the vascular flora analysis above, these plants are believed to have been introduced from the upper reaches of the Han River when the Han River flooded due to heavy rains during the record-breaking rainy season in 2006 and 2020.