• 제목/요약/키워드: stream vegetation

검색결과 330건 처리시간 0.023초

하천습지의 식생학적 자연도 평가 (Assessment of Degree of Naturalness of Vegetation on the Riverine Wetland)

  • 전승훈
    • 환경영향평가
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    • 제20권1호
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    • pp.1-11
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    • 2011
  • This study was carried out to suggest the baseline data necessary for vegetation restoration at riverine wetland within stream corridor. We used the prevalence index for wetland assessment by applying the method of weighted averages with index values based on five hydrophyte indicator status as defined by estimated probability occurred in wetland. We selected near nature and urbanized reach of Gap and Yanghwa streams as experimental site. Although two sites have some different disturbance and characteristics of watershed, they showed that similarity of vegetation community including three dominant species - Salix koreensis, Phragmites communis, Miscanthus sacchariflorus - was very high. But in case of Yanghwa stream, various kinds of emergent plants along wetted condition were distinctly occurred, resulted from difference of hydrological regime and substrate, etc. Degree of naturalness of vegetation at the sampled areas indicated that near nature area of Gap stream and all area of Yanghwa stream were fitted as riverine wetland, while urbanized area of Gap stream has changed into upland condition. In conclusion assessment system using prevalence index would be considered an effective method for evaluating of natural states of riverine wetland, but further integrated consideration of physical, hydrological, and biological factors of stream process, and also with considering the difference between those qualitative data of vegetation community.

하천 조성 기법에 따른 서호천 식생 및 식물상의 차이 비교 (The Differentiation on the Plant Flora and Vegetation Caused by the Different Technique of Stream Restoration at the Seo-Ho Stream)

  • 김송이;김혜주;이규석
    • 한국환경복원기술학회지
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    • 제7권3호
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    • pp.26-34
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    • 2004
  • It is expected that the different techniques of stream restoration could be caused the different conditions of the stream ecosystem. The study was to investigate and compare plants and vegetation clusters of appearing plant species in the upper and lower section of the Seo-Ho stream, It was classified and listed all of the plants appeared in the upper and lower section of the stream, It was used the belt-transect method and Unweighted pair group method using arithmetic algorithm in order to examine and analyzed discover the vegetation clusters, In the result, 28 families and 114 species appeared in the upper section, In the other side, 26 families and 93 species appeared in the lower section of the steam. The naturalized index of the upper section was 21%, and that of the lower section was 27%. In addition, the upper section has more various geographical features than lower section of the stream. So that, consequently the study shows that the different techniques of stream restoration could be caused the different growth of the stream ecosystem.

인천 승기천에서 하안식생의 현황과 복원 방안 (Status of Riparian Vegetation and Implication for Restoration in the Seunggi Stream, Incheon)

  • 조강현;김자애;이효혜미;권오병
    • 한국환경복원기술학회지
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    • 제4권2호
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    • pp.62-73
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    • 2001
  • The riparian environments of urban streams in Korea have been disturbed through the channelization for flood control and artificial land use as well as water pollution and flow decrease due to industrialization and urbanization. The flora and vegetation structure were investigated and an implication of stream restoration was discussed for the conservation of biodiversity in the riparian area of the Seunggi stream in Incheon. Naturalized plants and ruderal plants were widely distributed in the riparian area which was disturbed from cultivating, trampling, dumping etc. Submerged and floating hydrophytes were not found in the stream due to channelization and water pollution. Some halophytes were remained in downstream and reservoir after reclamation and embankment. The communities of Humulus japonicus, Panicum dichotomiflorum, Digitaria sanguinalis, Artemisia montana, Amaranthus retroflexus, and Aster pilosus were distributed in the disturbed area of bank slope and floodplain in the stream. As a natural potential vegetation, Phragmites australis in the wet meadow, Typha latifolia, Typha angustifolia, Oenanthe javanica, Persicaria thunbergii, and Penthorum chinense in the marsh, and Salix babylonica and Salix matsudana for. tortuosa in the woodland appeared in the floodplain. The topography in the stream played an important role on the distribution of riparian vegetation in the Seunggi stream. Appropriate methods for conservation and restoration of the riparian ecosystems must be planned on the basis of the actual vegetation in the disturbed urban stream.

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도시하천 하도구조와 경관의 계절변화 - 춘천시 공지천을 중심으로 - (Seasonal Changes in Structure and Landscape of Urban Stream Corridor - In the Case of Gongji Stream in Chuncheon-)

  • 조현길;한갑수
    • 한국환경과학회지
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    • 제14권8호
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    • pp.739-748
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    • 2005
  • The purpose of this study is to analyze seasonal changes in structure and landscape of Gongji stream corridor in Chuncheon, and to suggest some guidelines to contribute to creating a desirable close-to- nature stream. The study seasonally surveyed floodplain and revetment conditions, channel micro-topography, streamflow level and velocity, and vegetational cover. Flooding, water level, and vegetation were major factors of affecting seasonal changes in streambed structure and stream landscape. Small sand bars and islands were considerably disturbed by flooding and water level change. However, large islands and sand bars in the upper and middle section of the study stream remained or reappeared even after flooding. Flooding also tended to repeat channel sedimentation at the same spot. Controlling water volume of the Euiam Lake, which is adjacent to the study stream, caused higher water level downstream in the dry seasons. The majority of vegetation in sand bars and islands was washed away by the floods. Vehicle passing, crop cultivation, and ball game were other elements which disturbed vegetation in the floodplain. Creating a close-to-nature stream should reflect micro-topographical changes of channel by flooding, prevent improper vehicle entry and human use, and remove concrete material in the revetment and floodplain.

국내 도시하천에 대한 식수허가지도의 적용성 검토 (An Application Analysis of Vegetation Permission Map in Urban Stream in Korea)

  • 이준호;윤세의
    • 한국방재학회 논문집
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    • 제5권3호
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    • pp.47-55
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    • 2005
  • 도시하천의 관리와 계획에 있어 식수에 따른 수리학적 특성의 변화는 명확히 분석되어야 한다. 본 연구에서는 도시하천의 식수기준을 분석하고, 도시하천의 고수부지내 식수가 가능한 지역을 표시한 식수허가지도 제작 방법을 검토하였다. 또한 식수에 따른 수리학적 영향을 준2차원 수치모형, HEC-RAS, FESWMS 모형을 활용하여 분석하였다 중랑천의 장안교부터 군자교까지의 구간을 대상으로 선정하여 100년 빈도 홍수량에 식수허가지도를 제작한 결과, 교목의 식수시에는 하천의 우안에 $0.5{\sim}1$본/ha 정도의 식수가 가능하였으며, 관목의 경우에는 좌안 및 우안의 중요수방구간을 제외한 지역에 식재가 가능하였다. 또한 관목의 식재에 따른 수리학적 영향은 약 12cm 정도의 수위상승 결과를 나타내었다. 따라서 대상구간에 식수에 따른 수위 상승은 적은 것으로 판단되므로 식수허가지도에 따라 식수가 가능할 것으로 판단된다.

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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수변 완충식생대 조성을 위한 경안천 하류유역의 강변식생 실태 진단 (Diagnosis on the Riparian Vegetation in the Downstream Reach of the Gyungan Stream for Creating Vegetation Belt)

  • 안지홍;임치홍;임윤경;남경배;피정훈;문정숙;방제용;이창석
    • 한국물환경학회지
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    • 제31권6호
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    • pp.680-692
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    • 2015
  • A landcover map watershed of downstream reach in the Gyungan stream was made by using the existing land use map and interpreting satellite images and aerial photos. Based on the map, we analyzed land use patterns of this basin. Broad-leaved forest occupied the largest area among landscape elements established in this watershed. The total area of the zone designated as the waterside district by the central government was 4.7 km2 , and broad-leaved forest occupied the largest area as 33.9% in this zone. Therefore, the area did not meet the qualifications of riparian zones. Riparian vegetation established in the Gyungan stream watershed was composed of Phragmites communis, Miscanthus sacchariflorus, Salix gracilistyla, Salix koreensis. But terrestrial vegetation elements such as Ambrosia trifida, Ailanthus altissima, Robinia pseudoacacia also appeared in this area. On the other hand, Phragmites japonica, Salix gracilistyla, Salix koreensis, Salix integra, Ulmus davidiana and so on appeared in the riparian zone the reference streams. Differently from the vegetation established on the reference streams, terrestrial vegetation elements appeared frequently in the Gyungan stream watershed. This result would be due to that the Gyungan stream watershed is exposed to excessive human interferences.

충청남도 금산천과 기사천의 식물상 및 식생분석 (Analysis on the Flora and Vegetation of Geumsan and Gisa Stream Located in Chunchengnam-do)

  • 박인환;조광진;사공정희;김혜영
    • 한국환경복원기술학회지
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    • 제17권1호
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    • pp.45-64
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    • 2014
  • This study was carried out to offer the ecological data for restoring and maintaining a local stream by analyzing the vegetation and flora in Geumsan Stream and Gisa Stream, Geumsan-gun, Chungcheongnam-do, Korea. As a result of comparison of realities of land use near Geumsan Stream and Gisa Stream, in Geumsan Stream, the ratio of residential areas, commercial and business places, and places of transportation facilities was high. With these types of land use aggregating densely in the center, farmlands were formed on both sides. On the other hand, in Gisa Stream, farmlands were distributed evenly in all sections. As a result of comparison of flora of the two streams, Geumsan Stream had a total of 166 taxons including 53 families, 131 genuses, 139 species, 23 varieties, and 4 forms, and Gisa Stream had a total of 142 taxons including 42 families, 111 genuses, 116 species, 21 varieties, and 5 forms. As a result of calculation of the Naturalization Index and Urbanization Index, the indices were analyzed to be 23.5% and 12.1% in Geumsan Stream and to be 21.8% and 9.7% in Gisa Stream, respectively. Hence, Geumsan Stream showed higher figures in both evaluation indices than those of Gisa Stream. In addition, as a result of calculation of the Actual Urbanization Index, which is the index supplemented by considering the species pool and area, it could be known that Geumsan Stream (0.0285) was urbanized more than Gisa Stream (0.0107) by about 2.7 times. A total of 18 plant communities were classified in Geumsan Stream and Gisa Stream. In Geumsan Stream, 14 vegetation types were identified, and it was analyzed that there are various vegetation types including Phalaris arundinacea community, Zoysia japonica community, Phragmites japonica-Phalaris arundinacea community, etc. evenly distributed. 11 vegetation types were identified in Gisa Stream, and it was examined that Phragmites japonica community is widely distributed in all sections.

청주 무심천의 교란에 따른 식생분포의 변화 (Changes of Riparian Vegetation in Relation to Disturbance of Musim-Chon Stream, Cheongju)

  • 강상준;곽애경
    • The Korean Journal of Ecology
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    • 제21권5_1호
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    • pp.435-448
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    • 1998
  • The phytosociological investigation was carried out at 32 sites of the riparian vegetation in Musim-Chon stream passed through Choengju-City, Chungcheongbuk-Province by Braun-Blanquet's method from August to October, 1997. The flora of vascular plants in this survey was 202 species. The riparian vegetation was classified into 25 communities as follows. The submerged hydrophytes are Potomogeton malaianus var. latifolius community, Potomogeton crispus community, Myriophyllum verticillatum community-Hydrilla verticillata community and Ceratophyllum demersum community. The floating-leaved hydrophyte is Trapa japonica community. The emerged hydrophytes are Phragmites communis community, Perzicaria thunbergii community, Phragmites japonica community, Oenanthe javanica community, Zizania latifolia community and Persicaria hydropiper community. The herbaceous vegetation of floodplain are Artemisia montana community, Humulus japonicus community, Miscanthus sacchariflorus community, Erigeron anmus community, Impatiens balsamina community, Bidens frondosa community, Setaria viridis community, Ambrosia artemisiifolia var. elatior community and Eragrostis ferruginea community. The woody vegetation of floodplain are Robinia pseudo-acacia community, Stephanandra incisa community and Clematis apiifolia community. The species diversity was low in the upper and down stream, while the diversity was high in the mid stream situated at the center of Choengju-City because of frequent disturbance by citizens. These results suggested that distribution of communities and species diversity was closely related to the disturbance.

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황폐계류 복원지의 식생변화 단기 모니터링 (Two years Monitoring of Vegetation Change in Torrential Stream Restoration Site)

  • 이헌호;이주형;박기영;장지욱
    • 한국산림과학회지
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    • 제103권2호
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    • pp.240-247
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    • 2014
  • 본 연구는 황폐계류 복원지의 식생변화에 대한 시계열 분석을 통하여 복원기법 및 효과에 대해 고찰하고자 수행 되었으며, 수질정화습지와 월류보, 수생식물 복원지에서 복원 전, 후 식생변화를 2년간 모니터링 하였다. 복원 1년 후 월류보에서 초본류 증가와 수질정화습지에서 줄풀의 피복도 증가가 조사되었다. 식생 피복률은 복원직후 10~30% 감소되었고, 복원 1년 후 복원 전 수준으로 조사 되었다. 황폐계류 복원지의 식생변화는 복원 후 1년 경과시점부터 서식종수, 귀화률, 피복률이 증가하는 것으로 조사되었다.