• Journal of Environmental Science International
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• v.24 no.8
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• pp.1065-1073
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• 2015

Urbanization can be significantly affected the hydrologic cycle by increasing flood discharge and heat flux. In order to mitigate these modifications in urban areas, Low Impact Development (LID) technique has been designed and applied in Korea. In order to estimate runoff reduction rate using SWMM LID model, the characteristics of five LID techniques was firstly analyzed for water balance. Vegetated swale and green roof were not reduce flood discharge nor infiltration amount. On the other hand, porous pavement and infiltration trench were captured by infiltration function. The flood reduction rate with LID is substantially affected by their structures and properties, e.g., the percentage of the area installed with LID components and the percentage of the drainage area of the LID components.

• Journal of Korean Society on Water Environment
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• v.31 no.1
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• pp.12-18
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• 2015

In this research, the hydrologic effects between a pre-existing urban landuse and low impact development (LID) applied conditions were compared and evaluated. The infiltration trench and tree box filter that were utilized in LID represent only 1% of the catchment area that they drain. Storm event monitoring were conducted from July 2010 to July 2014 on a total of 22 storm events in both LID sites. After LID, hydrological improvement was observed as the sites exhibited a delay (lag time) or reduction in the magnitude, frequency and duration of runoff and flow peaks as the rainfall progress. In addition, the maximum irreducible peak flow reduction for infiltration trench was found to be 61% and 33% for the tree box filter when rainfall was 40 mm and 30 mm, respectively. In designing LID, it is recommended to consider the storage capacity and catchment area, as well as the amount of rainfall and runoff on the site.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.715-719
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• 2006

청계천 유역에 침투 트렌치 설치시 영향을 분포형 모형인 WEP 모형을 통하여 평가하였다. 침투 트렌치는 홍수 저감 보다는 물순환 개선에 효과가 있으나, 갈수량 증가량이 대부분 합류식 하수관에 의해 배제되는 것으로 모의되었다. 물순환 개선을 위해서는 침투 트렌치 설치에 앞서 합류식 하수관 시설의 재정비 등 유역내 저류량이 하천으로 이어질 수 있도록 하는 노력이 필요할 것으로 판단된다.

• Journal of Forest and Environmental Science
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• v.40 no.2
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• pp.151-165
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• 2024

Recently, as the number of landscaping plant nurseries have increased, environmental problems such as topographical damage due to indiscriminate changes in land use, increased non-point pollution, and increased impervious areas are also occurring. In this study, we propose eco-friendly facilities and a detailed maintenance manual that can enhance the eco-friendliness and scenic beauty of landscaping plant nurseries that are increasingly located near cities. By exploring previous reports on eco-friendly facilities and related laws, we cataloged the types of eco-friendly facilities, and by referring to examples of eco-friendly facilities introduced in overseas cases and the environmental functions of agriculture, we cataloged the types of eco-friendly facilities suitable for introduction in plant nurseries. The selected facilities are rain gardens, tree boxes, vegetated filter beds, bio-retention, infiltration trench, infiltration tanks, permeable pavements, and sand filtration systems. The maintenance tasks of eco-friendly facilities were categorized and management plans were proposed, which is expected to be utilized as a basic data to prepare eco-friendly space planning and operation management plans when creating a landscape plant nurseries in the future.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.854-858
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• 2008

최근 도시 및 단지 개발시 자연적인 물순환체계 구축에 대한 관심과 수요가 증가하고 있는 추세이다. 서울시를 비롯한 각 지자체에서도 빗물관리시설 적용과 관련된 조례를 제시하고 있으며, 건교부나 환경부에서도 수자원의 확보와 복원을 위한 빗물관련 법규 제정의 움직임을 보이고 있다. 또한 일부 지자체들은 도시 및 단지 개발시 빗물관리시설의 적용을 전제로 사업승인을 하는 등 수자원확보와 수순환복원을 위해 빗물관리에 대한 관심이 높아지고 있다. 특히 최근 문제시되는 물부족 현상에 대비해 대체수자원으로써 빗물의 저류와 침투를 통한 직 간접적인 활용은 수자원 확보에 있어 하나의 대안이 될 수 있다. 이에 본 연구에서는 공동주택단지를 대상으로 하여 빗물관리시설중 침투정과 침투트렌치 적용에 따른 유출저감효과를 분석하였다. 본 연구에서는 대상지점으로 표준이 될 수 있는 공동주택단지를 선정하고, 대상지점 내 적용이 가능한 곳에 기존 집수정과 우수관을 대신하여 침투정과 침투 트렌치를 가상으로 적용하였다. 침투정과 침투트렌치는 표준의 것을 적용하는 것으로 하고, '빗물 저류침투기술협회(일(日))'의 시설별 설계침투량 계산을 통해 침투정과 침투트렌치 적용에 따른 대상지점에 우수유출량을 합리식으로 계산하였다. 그리고 대상지점의 개발전 유출량과 개발후 유출량(집수정, 우수관적용), 개발후 유출량(침투정, 침투트렌치적용)의 비교를 통해 빗물관리시설의 적용에 따른 유출저감효과를 분석하였다.

• Journal of Korean Society on Water Environment
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• v.36 no.3
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• pp.206-219
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• 2020

As urbanization and impermeable areas have increased, stormwater and non-point pollutants entering the stream have increased. Additionally, in the case of the old town comprising a combined sewer pipe system, there is a problem of stream water pollution caused by the combined sewer overflow. To resolve this problem, many cities globally are pursuing an environmentally friendly low impact development strategy that can infiltrate, evaporate, and store rainwater. This study analyzed the expected effects and efficiency when the LID facility was installed as a measure to improve hydrologic cycle and water quality in the Oncheon stream in Busan. The EPA-SWMM, previously calibrated for hydrological and water quality parameters, was used, and standard parameters of the LID facilities supported by the EPA-SWMM were set. Benchmarking the green infrastructure plan in New York City, USA, has created various installation scenarios for the LID facilities in the Oncheon stream drainage area. The installation and maintenance cost of the LID facility for scenarios were estimated, and the effect of each LID facility was analyzed through a long-term EPA-SWMM simulation. Among the applied LID facilities, the infiltration trench showed the best effect, and the bio-retention cell and permeable pavement system followed. Conversely, in terms of cost-efficiency, the permeable pavement systems showed the best efficiency, followed by the infiltration trenches and bio-retention cells.

• Journal of Korea Water Resources Association
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• v.38 no.6 s.155
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• pp.449-460
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• 2005

In this study, a WEP (Water and Energy transfer Processes) model was used to simulate the water cycle of the Dorimcheon catchment which suffers from the distorted water cycle as a typical urban catchment. Two different land uses in the past (i.e. 1975) and at present (i.e. 2000) were incorporated into the simulation to investigate the runoff characteristics resulting from the increase of the impervious ratio due to urbanization. The simulation results show that the concentration time is decreased and the peak discharge and the total runoff are increased by urbanization while the infiltration and baseflow are reduced. In addition, the effects of infiltration trenches and permeable pavements were also simulated to search for alternatives that can restore the distorted water cycle. The simulation results prove that the installation of both alternatives can restore the runoff characteristics to that prior to urbanization.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.1794-1798
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• 2010

침투형 우수유출저감시설 중 침투트렌치에 대한 치수효과를 다양한 유입유량을 적용하여 실험하였고 침투량, 유출량, 유출 시작시간, 종기침투능 및 종기침투능에 도달하는 시간 등을 계측하여 정량적으로 분석하고 적용방안을 도출하고자 하였다. 수리실험에 사용된 침투트렌치의 규모는 배수구역을 $130m^2$($6.5m{\times}20m$)로 가정하여 CN을 산정하였으며 그 결과 AMC-I 조건하에서 5개의 침투트렌치수심에 대하여 CN은 트렌치경사 2%일 때 84, 경사 5%일 때 83으로 산정되었고, AMC-III 조건하에서 CN은 트렌치 경사 2%, 5% 모두 84로 산정되었다.

• Journal of Wetlands Research
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• v.15 no.4
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• pp.535-541
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• 2013

The urbanization affects significantly on a natural water circulation system by increasing the imperviousness rate. It is also negatively affecting on urban temperature, environmental pollution, water quality, and aqua-ecosystems. The Korea MOE (Ministry of Environment) adapted a new environmental policy in order to reduce the impact of urbanization, which is the Green Stormwater Infrastructure (GSI) program. The GSI can be achieved by protecting conservable green spaces, enlarging more green spaces, and constructing more permeable pavements. The GSI is including many different techniques such as bioretention, rain garden, infiltration trench and so on. Also It is the infrastructures using natural mechanisms of soils, microorganisms, plants and animals on a water circulation system and pollutant reduction. In this research, a multi functional GSI technology with infiltration-filtration mechanisms has been developed and performed lab-scale tests to evaluate the performances about infiltration rate restoration and pollutant reduction. The most of pollutants including metals, organics and particulates were reduced about 50~90% due to water infiltration and storage functions. The clogging was found when the TSS loading rate was reached on $8.3{\sim}9.0kg/m^2$, which value is higher than the values in literatures. It means the new technology can show high performances with low maintenances.

• Journal of Wetlands Research
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• v.20 no.4
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• pp.424-431
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• 2018

Stormwater runoff containing considerable amounts of pollutants such as particulates, organics, nutrients, and heavy metals contaminate natural bodies of water. At present, best management practices (BMP) intended to reduce the volume and treat pollutants from stormwater runoff were devised to serve as cost-effective measures of stormwater management. However, improper design and lack of proper maintenance can lead to degradation of the facility, making it unable to perform its intended function. This study evaluated an infiltration trench (IT) that went through a series of maintenance operations. 41 monitored rainfall events from 2009 to 2016 were used to evaluate the pollutant removal capabilities of the IT. Assessment of the water quality and hydrological data revealed that the inflow volume was the most relative factor affecting the unit pollutant loads (UPL) entering the facility. Seasonal variations also affected the pollutant removal capabilities of the IT. During the summer season, the increased rainfall depths and runoff volumes diminished the pollutant removal efficiency (RE) of the facility due to increased volumes that washed off larger pollutant loads and caused the IT to overflow. Moreover, the system also exhibited reduced pollutant RE for the winter season due to frozen media layers and chemical-related mechanisms impacted by the low winter temperature. Maintenance operations also posed considerable effects of the performance of the IT. During the first two years of operation, the IT exhibited a decrease in pollutant RE due to aging and lack of proper maintenance. However, some events also showed reduced pollutant RE succeeding the maintenance as a result of disturbed sediments that were not removed from the geotextile. Ultimately, the presented effects of maintenance operations in relation to the pollutant RE of the system may lead to the optimization of maintenance schedules and procedures for BMP of same structure.