• 제목/요약/키워드: wetland vegetation

검색결과 310건 처리시간 0.028초

도림천 수변지역 조성을 위한 생태적 관리방안 및 하천환경 관리방안에 관한 연구 (Studies on the Ecological Management and Stream Environment in Dorim Stream for Establishing Eco-wetland Parks)

  • 이상돈;김석철
    • 한국습지학회지
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    • 제10권3호
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    • pp.133-139
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    • 2008
  • 도심하천은 도심개발과 오염으로 인해 기능이 점차 상실되고 있다. 본 연구는 도림천의 출현 동물상 및 식물상을 파악하여 도심하천의 건강성을 평가하는 지표종을 발굴하고, 습지보전지역의 가능성을 위한 방안을 토론하였다. 도림천에서 안양천에 이르는 구간에 총 113종의 식물종, 포유류 9종, 조류 23종, 양서류 4종, 파츙류 2종과 어류 2종이 관찰되었다. 육상곤충은 71종이 관찰되었으며, 습지식생은 매우 다양하며 총 4개의 권역으로 나누었으며, 도심하천의 특징을 나타내는 수변지역 및 습지식물권역(습지식물권역, 반습지식물권역, 습지주변초지 지역, 습지주변교목지역)에 대한 관리방안이 도출되었다.

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담양하천습지의 식생유형과 분포양상 (Vegetation Classification and Distributional Pattern in Damyang Riverine Wetland)

  • 안경환;임정철;이율경;최태봉;이광석;임명순;고영호;서재화;신영규;김명진
    • 환경영향평가
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    • 제25권2호
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    • pp.89-102
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    • 2016
  • 담양하천습지는 영산강 본류에 위치하는 하천습지로서 2004년 습지보호지역으로 지정되었다. 이번 연구에서는 총 30개의 식생자료가 획득되었으며, 총 101종(미동정종 1종)을 포함하는 22개의 식생유형이 구분되었다. 현존식생도는 6개의 범례(하천림, 대상식생, 터주식생, 연안대식생, 습생초원, 개방수역)로 구분되었으며, 습지식생의 면적은 약 35%($386,841.86m^2$)를 차지하였다. 본 연구 결과 담양하천습지에 분포하는 식물사회는 보호지역 상단에 설치된 물막이보와 상부 유역에 운영 중인 담양댐 등으로 인해 급격한 수환경 변화로 형성된 것으로 유추되었다. 고수부지는 최근까지 경작이 진행되었으나 보호지역 지정 이후 방치됨으로써 현재와 같은 하천변 휴경작지의 식생경관이 형성되었다. 조사지역 내 환경부 지정생태계 교란 야생식물인 털물참피가 우점하는 군락이 넓게 발달하고 있으며, 국내 미기재된 새로운 귀화식물군락인 앵무새깃군락이 관찰되었다. 이들 식물군락들은 나도겨풀군락이 발달하는 환경과 중복되어 그 밖의 유사한 생태적 지위를 가지는 고유식물군락의 서식처를 점유하게 될 것이다. 담양하천습지의 다양한 식물사회들은 인공 시설물 등에 의한 하천환경 변화 및 교란, 훼손에 기인한 것으로 이해된다.

인공습지의 형태에 따른 계절별 질소처리 특성 연구 (A Study on Seasonal Nitrogen Treatment Characteristics according to Design of Constructed Wetland)

  • 손영권;윤춘경;김준식;김형중
    • 한국물환경학회지
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    • 제28권1호
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    • pp.94-101
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    • 2012
  • The performance data for eight years from a free-surface-flow constructed wetland system receiving agricultural tailwater were used to analyze denitrification rate and nitrogen treatment characteristics according to season and wetland design. Seasonal difference between growing season (March~November) and winter season (December~February) was shown in the concentration of all nitrogen species. Seasonal nitrogen treatment has similar trend with temperature and measured denitrification rate. The highest denitrification rate was measured in July, but treatment efficiency was most higher in May and June. Nitrogen absorption of vegetation could affect to these wetland performances, therefore dense population of wetland vegetation might be helpful. According to design of wetland, at least 25~50 m of wetland length was needed to decrease effluent T-N concentration to background concentration in growing season. In winter season, wetland needed much longer distance to reduce T-N concentration. Mass removal rate was continuously high through whole year because runoff coefficient was low in winter season. Applicability of constructed wetland was observed for the total maximum daily load that control T-N load.

MNDWI와 NDVI의 통합을 통한 내륙습지의 육화현상 추적: 우포늪을 사례로 (Monitoring the Desiccation of Inland Wetland by Combining MNDWI and NDVI: A Case Study of Upo Wetland in South Korea)

  • 황영석;엄정섭
    • Spatial Information Research
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    • 제23권6호
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    • pp.31-41
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    • 2015
  • 본 연구는 육화 추세를 추적하는 과정에서 MNDWI (Modified Normalized Difference Water Index)와 NDVI(Normalized Difference Vegetation Index)를 통합한 접근의 실용성을 평가하는 것을 목적으로 한다. 사례 연구지역인 우포늪에 대해 MNDWI는 수분 지수에 민감하여, 수문 객체는 더욱 강조하고 습윤 토양의 변화를 추적하는 등 수문 객체 외의 요소들은 더욱 강하게 배제하는 근거를 제시하였다. NDVI는 식생의 수령, 식생밀도에 대한 정보를 제시하고, 수분객체와 다른 토지 피복 유형(식생, 건물, 도로 등)을 가시적으로 추적하였다. NDVI와 MNDWI의 통합접근을 통해 산출되는 정량적이고 거시적인 정보는 NDVI와 MNDWI의 변화가 육화에 대한 정량적인 근거로 활용될 수 있다는 의미있는 결과를 보여준다. 본 연구는 향후 내륙습지의 육화에 대한 장기적 모니터링과 전반적인 육화 대응방안을 도출하는 과정에서 NDVI, MNDWI 통합접근의 근거가 되는 기초자료를 제공하였다.

Distribution Characteristic and Assessment of Soil Organic Matter, Nitrogen and Phosphorus in Soils of New born River Mouth Wetlands

  • Chen, Weifeng;Ann, Seoung-Won;Shi, Yanxi ;Mi, Qinhua
    • 한국환경과학회지
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    • 제12권2호
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    • pp.111-117
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    • 2003
  • This paper investigates preliminarily spatial distribution soil organic matter (SOM), nitrogen (N) and phosphorus (P) and its environmental influence in wetland soil of different vegetation landscape in the Yellow River Mouth. The result shows the SOM and total nitrogen (TN), efficient N, efficient P in top layer soils of different vegetation district have significantly different content, The SOM is shown as Calamagrostis epigeios wetlands > Phragmites cmmunis wetlands > Tamarix chinensi wetlands above tidal > Suaeda salsa wetlands in high tidal > Tamarix chinensi wetlands in high tidal > tidal flats, the arrange of the TN and efficient N content is the same except that the content in Suaeda salsa wetlands in high tidal is heavier than Tamarix chinensi wetlands in high tidal. In different vegetation landscape wetland types the vertical change of soil nutrients are obvious except for p, gradually decrease from the upper to the lower. This case reflects the function of the vegetation on the wetland development of soil and proves the wetland soil has the characteristic of new born and bad degree of development. SOM, TN, efficient N and efficient P content in wetland soils have significantly positive correlation, but TP have no correlation with them but efficient p. The contents of TN in wetland soils range from 58~1480 mg/kg, total average content 408 mg/kg, average content of above 30 cm is 625 mg/kg. The range of TP content in the soil is 372~1042 mg/kg, total average is 569 mg/kg, average content of above 20 cm is 611 mg/kg. According the P it occurs mainly as calcium phosphates, and the validity is lower, therefore, N and P in the new born wetlands cannot produce serious impact on the environments at present.

담수호 수자원보전을 위한 유역처리 연못-습지 시스템(지역환경 \circled2) (Pond-Wetland System for the Water Resources Conservation of Estuary Lake)

  • 양홍모;최수명;윤광식
    • 한국농공학회:학술대회논문집
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    • 한국농공학회 2000년도 학술발표회 발표논문집
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    • pp.557-562
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    • 2000
  • Estuary lakes constructed for agricultural water resources development projects have encountered eutrophication problems. Natural water purification function of wetland is considered for nutrient removal from inflowing stream. A constructed wetland was designed and installed for pollutant loading abatement in estuary lake Koheung. Combined pond-wetland system was adopted. In this system primary and secondary ponds and six wetland cells were interconnected. Reed and cattail were selected for wetland vegetation and planted in the wetland cells. In this paper, design criteria of the pond-wetland system in temperate weather zone is presented.

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Contributions of emergent vegetation acting as a substrate for biofilms in a free water surface constructed wetland

  • Zhao, Ruijun;Cheng, Jing;Yuan, Qingke;Chen, Yaoping;Kim, Youngchul
    • Membrane and Water Treatment
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    • 제10권1호
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    • pp.57-65
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    • 2019
  • This study assessed the contribution of emergent vegetation (Phragmites australis, Typha latifolia, and Nelumbo nucifera) to the submerged surface area, the amount of biofilms attached to the submerged portions of the plants, and the treatment performance of a free water surface (FWS) constructed wetland. Results showed that a 1% increase ($31m^2$) in the vegetative area resulted in an increase of $220m^2$ of submerged surface area, and 0.48 kg Volatile Suspended Solids (VSS) of attached biofilm. As the vegetation coverage increased, effluent organic matter and total Kjeldahl nitrogen decreased. Conversely, a higher nitrate concentration was found in the effluent as a result of increased nitrification and incomplete denitrification, which was limited by the availability of a carbon source. In addition, a larger vegetation coverage resulted in a higher phosphorus in the effluent, most likely released from senescent biofilms and sediments, which resulted from the partial suppression of algal growth. Based on the results, it was recommended that constructed wetlands should be operated with a vegetation coverage of just under 50% to maximize pollutant removal.

제주도 내륙습지 미나리못의 식생 형성과 물환경과의 관계 (Formation of Vegetation in an Inland Wetland, Minarimot, of Jeju Islands, and its Relationship to Water Environment)

  • 김명현;한민수;방혜선;정명표;나영은
    • 한국환경농학회지
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    • 제28권4호
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    • pp.365-370
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    • 2009
  • The aim of this study was to investigate the vegetation types of Minarimot, in Jeju Islands. The vegetation types were classified by the Z-M school method and cluster analysis. The vegetation in Minarimot was classified into 6 communities and 2 subcommunities: Persicaria thunbergii-Isachne globosa community (vegetation type: A), Scirpus tribangulatus-Eleocharis manillata var. cyclocarpa community (B) (Aneilema keisak subcommunity (B-1) and Caldesia parnassifolia-Potamogeton distinctus subcommunity (B-2)), Eleocharis kuroguwai community (C), Phragmites communis community (D), Scirpus tabernaemontani community(E) and Typha orientalis community (F). These communities were grouped into three main categories according to cluster analysis. The community (A) established at the edge of the wetland which has the driest condition was distinguished as Group I, while the community (B) emerged in the submerged zone was distinguished as Group III. The Group II was designated as the communities (C, D, E, F) between Group I and III, whose communities were occasionally submerged. The result of principal coordinate analysis (PCoA) appeared that the different vegetation established along the wetland were depending on water environment such as water depth and the period submerged.

Linear Spectral Mixture Analysis of Landsat Imagery for Wetland land-Cover Classification in Paldang Reservoir and Vicinity

  • Kim, Sang-Wook;Park, Chong-Hwa
    • 대한원격탐사학회지
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    • 제20권3호
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    • pp.197-205
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    • 2004
  • Wetlands are lands with a mixture of water, herbaceous or woody vegetation and wet soil. And linear spectral mixture analysis (LSMA) is one of the most often used methods in handling the spectral mixture problem. This study aims to test LSMA is an enhanced routine for classification of wetland land-covers in Paldang reservoir and vicinity (paldang Reservoir) using Landsat TM and ETM+ imagery. In the LSMA process, reference endmembers were driven from scatter-plots of Landsat bands 3, 4 and 5, and a series of endmember models were developed based on green vegetation (GV), soil and water endmembers which are the main indicators of wetlands. To consider phenological characteristics of Paldang Reservoir, a soil endmember was subdivided into bright and dark soil endmembers in spring and a green vegetation (GV) endmember was subdivided into GV tree and GV herbaceous endmembers in fall. We found that LSMA fractions improved the classification accuracy of the wetland land-cover. Four endmember models provided better GV and soil discrimination and the root mean squared (RMS) errors were 0.011 and 0.0039, in spring and fall respectively. Phenologically, a fall image is more appropriate to classify wetland land-cover than spring's. The classification result using 4 endmember fractions of a fall image reached 85.2 and 74.2 percent of the producer's and user's accuracy respectively. This study shows that this routine will be an useful tool for identifying and monitoring the status of wetlands in Paldang Reservoir.

Successional changes in plant composition over 15 years in a created wetland in South Korea

  • Son, Deokjoo;Lee, Hyohyemi;Cho, Kang-Hyun;Bang, Jeong Hwan;Kwon, Oh-Byung;Lee, Eun Ju
    • Journal of Ecology and Environment
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    • 제42권4호
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    • pp.183-190
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    • 2018
  • Backgrounds: The main purpose of this research was to assess changes in vegetation structure, wetland index, and diversity index for a 15-year-old created wetland in Jincheon, South Korea. The created wetland consists of four sub-wetlands: a kidney-shaped wetland, a ditch, an ecological pond, and a square wetland. Vegetation and water depth data were collected at each site in 1999 and 2013, and Shannon diversity and wetland indices were calculated. Results: The total number of plant species increased from 18 in 1999 to 50 in 2013, and the ecological pond in 1999 and the ditch in 2013 presented the highest diversity indices (2.5 and 3.2, respectively). Plant species were less diverse in 1999 than in 2013, presumably because these initial wetlands were managed periodically for water purification and installation of test beds. The proportion of wetland plants, including obligate wetland and facultative wetland species, decreased from 83 to 56%, whereas upland plants, including obligate upland and facultative upland species, increased from 17 to 44%. After ceasing water supply, water depth in all four sub-wetlands declined in 2013. Thus, upland plants established more readily at these sites, resulting in higher diversity and lower wetland indices than in 1999. Conclusions: The major floristic differences between 1999 and 2013 were an increase in the number of upland plants and a decrease in wetland species. Although wetland indices were lower in 2013, the created wetland performed important ecosystem functions by providing habitats for wetland and upland plants, and the overall species diversity was high.