• Title/Summary/Keyword: STREAM VEGETATION

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Classification of Avian Habitats Based on Vegetation Types in Urban and Natural Streams (도심하천과 자연하천의 식생형에 따른 조류 서식지 유형분석)

  • Pyo, Jae-Hun;You, Young-Han
    • Journal of Wetlands Research
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    • v.13 no.1
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    • pp.67-77
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    • 2011
  • To classify the relationship between riparian vegetation type and bird habitat, we studied the vegetation and avian species in the three streams(Anyang Stream, Gap Stream, Seom River), located in middle province. Five different vegetation types - Woodland type, Shrub type, Tall and wet grassland type, Low and dry grassland type and Cropland - were identified. The habitats of avian species were highly correlated with vegetation type. Streptopelia orientalis and Hypsipetes amaurotis were found in woodland. Both Paradoxornis webbiana and Phoenicurus auroreus were mainly found in shrub. Tall and wet grassland were preference habitats of Ixobrychus sinensis, Acrocephalus arundinaceus, while, low and dry grassland were occupied by Phasianus colchicus, Falco tinnunculus. Cropland were used as breeding and feeding sites for Egretta alba modesta, Anas poecilorhyncha, Anthus spinoletta. Distribution patterns of avian species were clearly divided by vegetation type and site characteristics in the stream.

Reference information for realizing ecological restoration of river: A case study in the Bongseonsa stream

  • Park, Sung Ae;Kim, Gyung-Soon;Pee, Jung-Hun;Oh, Woo-Seok;Kim, Hye-Soo;Lee, Chang Seok
    • Journal of Ecology and Environment
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    • v.36 no.4
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    • pp.235-243
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    • 2013
  • In Korea, where the plain land is greatly deficient as a mountainous nation, most of riparian zones were transformed into agricultural fields and urban areas. Excessive use of the land, which is close to river, makes the rivers enduring severe pollution stresses. Disappearance of riparian buffer, which plays a function of filter in the riverside, appears as a main factor aggravating water pollution of rivers. In this respect, it is imperative to restore the lost riparian vegetation. This study found out restoration models of riparian vegetation from the Bongseonsa stream, which has remnant riparian vegetation patches as a conservation reserve. Feasible reference information applicable for restoration of riparian vegetation was shown in the species level in the order of herb, shrub, and tree and sub-tree zones as far away from the waterway. Those information could contribute to restoring integrate and healthy rivers and streams beyond simple landscaping differently from the other restoration projects when they will be applied to the restoration project to be carried out in the future. In addition, the spatial range of river and stream, background that riparian zone disappeared in Korea, and application plan of the obtained reference information were discussed.

Restoration of the Stream Runoff by the Physical Deterministic Modeling and Formulation of Water Balance for the Catchment of Byungchun River in Chungcheong Province in Korea (물리 결정 모델링에 의한 충청도 병천천 유역의 하천 유출량 복원과 물 수지 수립)

  • KIM, Man-Kyu
    • Journal of The Geomorphological Association of Korea
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    • v.15 no.2
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    • pp.37-53
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    • 2008
  • This study has developed a water balance model for the catchment of Byungchun river using a BROOK90 4.4e physical deterministic water balance model with the long-term meterological data and stream run off data obtained from the basin of Byungchun river in Korea. It is intended that the validation model with calibrated model fitting parameter can build a long-term water balance plan for a period when meterological data are available but stream runoff data are not. Results of this study have satisfied the first expectation as an experiment for water balance modeling since measured stream runoff data have turned out to be very similar to simulated stream runoff data. Through the confirmation of model fitting parameters and validated simulation, water balance for the period of 1998 to 2006 has been restored. Unless the conditions of geomophology, vegetation, soil and land use change, meterological data alone can produce various hydrometeorological data related to stream runoff amount, soil water amount, and evapotranspiration. This study opens up a new horizon in restoring water balance in the past as well planning water balance in the present. The obtained results from this study are expected to be used in predicting future water balance in the wake of the changes in climate and vegetation in Korea.

A Study on the Ecological Aspects of Stream in Rural Village (농촌마을 소하천의 구간별 특성에 관한 연구 - 농촌 주거지역 소하천의 구조,수질,식생을 중심으로 -)

  • 이춘석;라순애
    • Journal of Korean Society of Rural Planning
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    • v.3 no.1
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    • pp.23-32
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    • 1997
  • The purpose of this study is to analyze structural and ecological characteristics of streams in rural village. The methods used in this study were measuring the section and surveying the vegetation of the stream at three points(upstream, inner village, downstream ) of 10 rural villages. The major findings of this study can be summarized as follows : 1) The average width of streams is 9 m, and the height of banks 3.1 m. the downstreams are the widest(average 10 m), and the inner-villages are the narrowest (average 8 m), and the slopes of basin are 7.33 %, 2.67 %, 1.39 % at upstream, inner-village, downstream respectively. 2) The downstreams are more contaminated than upstreams due to the sewage from the residents, especially livestock wastewater. 3) The dominant species in the streams are Persicaria thunbergii H. Gross (average Cover 17.76 %) and cumulus japonicas Sieb et. Zucc (average Cover 7.75 % ). 4) The average area covered by vegetation is 53.31 % the downstreams are covered 65.7 %, but inner-village area covered by vegetation is 46.6 %. 5) The problem found in this study are severe water contamination, poor accessibility to stream and poor vegetation of inner-village area, etc.

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The Study on the Evaluation of Environment Function at Small Stream - In the Case of Hongdong Stream in Hongsung-gun - (농촌지역 소하천의 환경성 평가 연구 - 홍성군 홍동천을 사례로 -)

  • Kang, Banghun;Son, Jin-Kwan
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.14 no.5
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    • pp.81-101
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    • 2011
  • This study was conducted to understand the environmental and ecological function of habitat through evaluation of water environment, soil environment, vegetation characteristics, macro-invertebrate characteristics, and visual habits environment evaluation (SVAP) in Hongdong stream located in Hongseong-Gun, Chungnam Province, and hereafter to utilize the results for the habits reconstruction and improvement project. As the results of water quality analysis, BOD, COD, T-P was almost below the standard quality from upper stream to down stream. The construction of small reservoir, wetland and water purification facility, and the management of non-point pollution are proposed to improve these problems. The soil texture was sandy soil, which is unfitted with vegetation development. The construction of shallows and bogs, and induction of soil sedimentation and biotope formation are proposed to improve these problems. In the plant flora, total 90 kinds were observed with 81 species and nine varieties in total 36 families and 85 genera, and the naturalization rate was higher at down area than upper area. As the results of macro-invertebrate fauna survey, total 26 species and 297 individuals in 20 families and 22 genera were collected. Peltodytes sinensis, Chironomidae sp., and Culicidae sp., which are observed at polluted environment, were collected as dominant species. An appropriate vegetation management party idea is necessary, and it is done an idea in consideration of the soil and a physical characteristic. Visual habits environment evaluation (SVAP) result was mostly determined with below normal (Fair) grade. Pollution source interception, purification pond establishment, and various bog establishment are proposed to improve these problems. With the above results, the ecological environment was determined with bad condition, and the improvement of biotope was urgently needed through sustainable monitoring and management of streams habitat in rural area.

A Study on Change of Wild Bird Habitat Characteristics According to Riparian Forest Construction in Yangjae Stream, Seoul (서울 양재천 하천 숲 조성에 의한 야생조류 서식특성 변화 연구)

  • Yun, Suk-Hwan;Han, Bong-Ho;Choi, Jin-Woo;Yun, Ho-Keun
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.21 no.5
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    • pp.97-110
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    • 2018
  • The purpose of this study is to provide basic data and evidence for the habitat improvement of wild birds in urban stream by analyzing changes in habitat characteristics of wild birds by riparian forest construction in Yangjae stream in Seoul. In Gangnam-gu, the multi layered riparian forest consisting of landscape trees and shrubs was formed on the slope. In Seocho-gu, the vertical vegetation structure of woody and herbaceous wetland plants was good. In Gangnam-gu, the vegetation area of the slope increased and the vertical stratification structure affected the species diversity of the forest birds. The number of species and individuals of plovers, sandpipers and wagtails decreased due to the impact of bicycle roads and trails. The poor forests on the levee slope in Seocho-gu affected the habitat selection and migration of the forest birds. The willows and amur silver-grasses formed in the riverside have been developed into the riparian forest, thus stabilizing the habitat of water birds by blocking disturbances from the influence of the trails.

Research on Characteristics of Vegetation Subsequent to Crossing Structure of the Urban Streams - Centering on the Cases of Dorimcheon, Banghakcheon, Seongnaecheon and Yangjaecheon in Seoul - (도시하천의 횡단구조에 따른 식생분포특성 연구 -서울시 도림천, 방학천, 성내천, 양재천을 사례로-)

  • Bae, Jung-Hee;Lee, Kyong-Jae;Han, Bong-Ho
    • Korean Journal of Environment and Ecology
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    • v.22 no.3
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    • pp.268-279
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    • 2008
  • This study is aimed at typifying the crossing structure and inquiring into the characteristics of vegetation distribution by type targeting Dorimcheon(stream), Banghakcheon(stream), Seongnaecheon(stream) and some sections of Yangjaecheon(stream) in Seoul through the establishment of basic data for restoring vegetation in urban stream. This research classified the crossing structure into 56 slope types and 31 vertical types in combination with the three items, such as bank slope(vertical style, slope style) of bank, absence or presence of waterside, and revetment structure. This research derived nine slope types including SB1 (revetment of low water level-revetment with vegetation, and revetment of high water level-nature riverside) including SG5(revetment of low water-concrete, and revetment of high water level-riprap work), and three vertical types, such as VH4(bank revetment-wet masonry), and VH7(bank revetment - concrete )from the target survey areas. Among these, both revetment of low water level and high water level were found to be distributed on the longest section as the type of SG7 and VG7 structured in concrete. As a result of inquiry and analysis of micro topography structure and vegetation structure of eight major types, this research could find out the influence of crossing structure on plant vegetation according to the characteristic by typified item, but there appeared no distinct characteristic of vegetation distribution by crossing structure.

Studies on the current status of ecosystem and ecological parks in Anyang Stream (안양천 및 주변지역의 생태계 현황 및 생태공원 조성방안 연구)

  • Lee, Sang-Don
    • Journal of Wetlands Research
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    • v.12 no.3
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    • pp.145-153
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    • 2010
  • An-yang stream is a branch stream connecting to Han river and regarded as a national stream. This study chose the representative stream of An-yang and identified vegetation and flora. The ecological survey aimed at identifying indicator of urban streams for measuring to protect urban areas and to promote wetland conservation. A total of 266 species were identified into 35 Orders, 78 Families. The introduced species of Sicyo angulatus need a special treatment to reduce the population. The wetland vegetation is quite various and we suggested 11 different vegetation zones depending on introduced species and amenity between human and nature, This will lead to blue-network to crease favorable environment and manage important species for this region.

An Evaluation on Restoration Effect in the Restored Yangjae Stream and the Improvement Plan Based on the Result (복원된 양재천에서 복원 효과 평가 및 평가 결과에 기초한 개선방안)

  • Kim, A Reum;Kim, Dong Uk;Lim, Bong Soon;Seol, Jae Won;Lee, Chang Seok
    • Korean Journal of Ecology and Environment
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    • v.53 no.4
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    • pp.390-407
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    • 2020
  • This study was carried out to evaluate the restoration effect in the restored Yangjae stream and to draw up an adaptive management plan based on the results. As the result of evaluation on the restoration effect, the restored Yangjae stream was evaluated with low naturalness in both terms of the morphology of the stream and the composition and spatial distribution of vegetation. The diverse functional groups were introduced in the vegetation restoration, but the flooding regime, which is significant in the spatial distribution of riparian vegetation, were not correctly reflected. Exotic species or species that were not ecologically suitable for the location were introduced on the embankment and thus a measure to improve those problems is required. As the ecological principle was not reflected in the restoration plan, the stream was constructed as the double terrace structure. Therefore, the width of the waterway was narrowed further, and the waterfront was not designed to accommodate changes from flooding disturbance, making the micro-topography of the stream simpler and the naturalness lower. The adaptive management plan was prepared to improve those problems, and a plan for creating an ecological network was recommended to enhance the restoration effect.

Structure and Dynamics of Korean Red Pine Stands Established as Riparian Vegetation at the Tsang Stream in Mt. Seorak National Park, Eastern Korea

  • Chun, Young-Moon;Park, Sung-Ae;Lee, Chang-Seok
    • Journal of Ecology and Environment
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    • v.30 no.4
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    • pp.347-356
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    • 2007
  • The structure and dynamics of Korean red pine stands established in the riparian zone were studied in the Tsang stream in Mt. Seorak National Park, in east-central Korea. Pine stands were classified into four successional stages, the initial, establishing, competitive, and stabilizing stages, based on the age distribution of a dominant tree, Pinus densiflora, the vegetation stratification, and the microtopography of the riverine environment. The stages usually corresponded to disturbance frequencies, depending on the horizontal and vertical distances from the watercourse. Stands of the initial and establishing stages lacked tree or subtree layers, or both. As stands progressed through the developmental stages, soil particle size became finer and moisture retention capacity was improved. The stand ordination reflected the developmental stage, and the species ordination differentiated species specializing in relatively dry and wet habitats. The results of the analysis of vegetation dynamics provided ecological information which will be useful for understanding the developmental processes of vegetation established in riparian zones. Species diversity indices usually increased across developmental stages, following the typical pattern for successional processes. We discuss the importance and necessity of riparian vegetation in Korea, where most riparian forests have disappeared due to excessive human land use.