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Kafe 바로가기주관연구기관 | 현대건설(주) |
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보고서유형 | 최종보고서 |
발행국가 | 대한민국 |
언어 | 한국어 |
발행년월 | 2014-06 |
주관부처 | 환경부 Ministry of Environment |
등록번호 | TRKO201600009168 |
DB 구축일자 | 2016-10-01 |
키워드 | 수생태 복원.생태하천.하상복원.하도육역화.유사관리.Ecological restoration.Ecological river.river-bed restoration.land-forming.sediment management. |
연구개발 결과
- 하도육역화 집중조사 대상구간 선정 및 모니터링 : 4대권역 조사/분석
- 하도육역화 유형체계화 : 6단계로 구분
- 하도육역화 대상지역 유사량 산정 : 유사발생량 조사를 통한 원인분석
- 하도육역화 관리기술 : 홍수터 유사관리기술 + 유사연속성확보기술
- 하도육역화 관리기술 검증 : 실내실험 + 실규모 + 시험하천 현장검증 지형/수리수문/생태모니터링 효과검증 완료
- 하도육역화 지침서 : 일반/설계지침서 제공
Ⅳ. Results
1. Selection of landforming sites and monitoring
After the collection and analysis of information as the monitoring outputs from ecosystem, hydrology, and environmental influence on the aquatic ecosystem, the comparative information for the application status of the developed techno
Ⅳ. Results
1. Selection of landforming sites and monitoring
After the collection and analysis of information as the monitoring outputs from ecosystem, hydrology, and environmental influence on the aquatic ecosystem, the comparative information for the application status of the developed technology was secured, and the information was then employed to select the monitoring items. The ecological monitoring has been carried out for vegetation, birds, amphibians/reptiles, fish, and benthic invertebrates. The monitoring objects exhibited sensitive responses for the developed technologies, so more extensive monitoring in three phases are planned. For hydrological monitoring, the flowing velocity, flowing volume, flowing particle diameters, and river topographic surveyings were performed, and three-dimensional precision survey was carried out to investigate the topographic changes. It will be comparatively evaluated followed by the construction method application. The water quality was turned out not to exhibit significant changes so to be utilized as a basic guidance for the ecosystem restoration in the future. It will be excluded for the further study due to its insignificant influence on the new technology.
2. Systematization of landforming types and development
landforming types and development was extracted from Analysis of several sites in 4 main river sites. We set the sixth stages; 1st fine sediments sedimentation stage, 2nd coarse sediment sedimentation stage and vegetation invasion in riparian, 3rd erosion decrease and sedimentation increase through the invaded vegetation and 4th ~ 5th stages fixation of sedimentation and vegetation settlement which makes problems in flood-risk. From these results, we set the valuation basis of landforming types and development.
3. Set the discharge sediment of selected sites
The watershed of Palmi-stream and Daejeon-stream was selected as main monitoring sites. There were several types of landforming in stream from 3 stage(mid-high) to 6 stage(highest). So, Basically we research the discharge sediment per year and calculated Palmi site’s total discharge sediment per year about 44,229 ton and Daejeon sites’s total discharge sediment per year about 28,012 ton.
4. Anti-landforming technology
The safety and efficiency of the Mulgol method has been ensured by the scale unit model test, so the relevant test results are assumed to be standard data for the size and applicability of the Mulgol method. Moreover, the on-site applicability and the management method for the channel landforming of the Mulgol method can be realized through the sediment control and energy reduction effect analysis of the Mulgol method that was developed by the hydraulic model test. Also, specific standardization for the size and effects of Mulgol method by using numerical properties of the scale unit model test is expected to be possible. The channel landforming preventive quaywall with the river channel drain method, Mulgol method, and the local scouring and the vegetation control type percolation pile method, which were developed by the investigation of relevant data and theoretical and experimental approaches, are applied for patents. The intellectual property rights for the technologies will be ensured as well as performing such efficient functions as vegetation control, the channel landforming prevention, and flowing velocity energy reduction. The developed technologies are expected to be verified and supplemented further through the continuous monitoring, hydraulic model test, and numerical simulation. After the suitability of the Mulgol method was analyzed by two-dimensional simulation, the sediment accumulation was turned out to be prevented naturally by the concentrated flow at the accelerated channel and the Mulgol method scale unit model. The results are expected to yield meaningful information for the standardization for three-dimensional numerical simulation later on. Moreover, 10% expansion of the scouring core and 30 % expansion of the scouring diameter were verified after the tree-dimensional numerical simulation about the scale unit model of the local scouring inducing type channel landforming preventive quawall. They will be used as basic standardization data for the on-site applicability in the third phase later on.
5. Verification of developed technology and evaluation of landforming reduction effect
The safety and efficiency of the Mulgol method has been ensured by the scale unit model test, so the relevant test results are assumed to be standard data for the size and applicability of the Mulgol method. Moreover, the on-site applicability and the management method for the channel landforming of the Mulgol method can be realized through the sediment control and energy reduction effect analysis of the Mulgol method that was developed by the hydraulic model test. Also, specific standardization for the size and effects of Mulgol method by using numerical properties of the scale unit model test is expected to be possible.
6. Development of landforming assessment systemI
It is consisted of server, input system and database for landforming assessment in selected sites. Several datas are secured from river corridor survey and main input datas are extracted from land/water area, land level change, grain size distribution and vegetations. These input data is processed by optimal ways to assess the sites. As the result, we can get the landforming types and development of selected sites automatically and continuously.
7. Guide-line for landforming management technology
Guide-line composed 3 section ; General guide-line, Application guide-line & Maintenance . Firstly, General guide-line is included by process development for landforming condition. This study made total process draft. Secondly, Application guide-line is included by technology utilization. We indicated developed techniques of plan, design, specification(ex, Mul-gol method). finally, This study proposed eco-friendly based Maintenance and analysis existing river-bed method.
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