• Title, Summary, Keyword: LID

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Presentation of the Design Process and Capacity Estimation of Rainwater Management for LID Pilot Project (LID 시범단지 설계절차 제시 및 빗물관리용량 산정)

  • Jung, Jong-Suk;Kim, Kyeong-Jin
    • LHI Journal of Land, Housing, and Urban Affairs
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    • v.9 no.3
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    • pp.19-27
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    • 2018
  • Recovery of rainwater cycle is vital to be sustainable development. This means that LID design process is necessary for the urban regeneration. First of all, this study investigated and analyzed the existing LID design process. The existing LID design processes have many limitations to be applied to proper LID facilities because it is not considered in site conditions and water flow of the site. To solve the limitations of the existing LID design process, this study present the improved LID design process to be considered in hydrographic analysis through GIS analysis and finding points to install proper LID facilities. Through these considerations, this study present the improved LID design process to be applied to urban regeneration.

Evaluation and Improvement Directions of Laws and Regulations Related to Space and Environmental Planning Toward Extended Application of LID in Korea (저영향 개발(LID) 확대 적용을 위한 공간·환경 계획 관련 법·제도 평가 및 개선방향)

  • Son, Cheol Hee;Baek, Jong In;Ban, Yong Un
    • Journal of the Korean Regional Science Association
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    • v.34 no.4
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    • pp.49-60
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    • 2018
  • To restore urban water cycle, it is necessary to improve domestic laws and regulations related to LID(Low Impact Development), which has been successfully applied to foreign countries. Thus, this study has intended to evaluate domestic legal systems related to space and environmental planning and to suggest directions to improve laws and regulations related to space and environmental planning toward extended application of LID in Korea. To reach this goal, this study has analyze the legal and institutional status of the foreign countries where LID has currently been applied, to derive the factors that laws and institutions are required to support LID based on the above analysis, to evaluate domestic laws and regulations related to space and environmental planning, and to suggest directions to improve the laws and regulations. After the evaluation, this study has found the following results. First, it was found that the concept and basic principles of LID and LID planning and associated methods were no longer mirrored in the space planning-related laws and regulations. However, these problems are not confined to LID, and result from thefailurein applying environmental planning to space planning overall. Second, it was revealed that the environmental planning-related laws and regulations defined the terminologies and targets of LID and suggested different measures to improve LID-related policies differently depending on the backgrounds ofenforcing thelaws and regulations and on environmental properties. Finally, this study has suggested the directions to improve laws and regulations related to space and environmental planning as follows. First, it is necessary to enact a law to support the extended application of LID. Second, the law to be enacted should be connected to laws, enforcement ordinances and regulations, and guidelines related to space planning. Third, environmental benefits provided by both structural and non-structural techniques of LID should be quantitatively measured.

Applicability Estimation of LID Techniques (LID 요소기술의 적용성 평가)

  • Yeon, Jong Sang;Kim, Eung Seok;Shin, Hyun Suk;Jang, Young su
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.444-444
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    • 2015
  • 현제 도시유역의 산업화와 도시화로 인해 유역 내 불투수면적의 증가는 직접 유출량 증가, 지하수자원 고갈, 침투량 감소, 증발산량의 감소 등의 물 순환 체계의 변화를 가져왔다. 이러한 도시 유역 내 물 순환 체계 변화를 개선하기 위해 여러 국가에서 저영향개발(Low Impact Development, LID)의 개발 및 도입이 진행되고 있다. LID는 분산형 빗물관리 시설로써 유역 내 소규모의 LID 요소기술을 대상유역에 적용하여 강우유출수를 저류, 체류, 방지 및 처리하는 시설을 의미한다. LID는 궁극적 목표로 계획단계에서 개발이전의 수문기능을 유지하기 위해 보전, 영향최소화, 유출이동시간 유지, 추가유출량 감소, 오염발지에 초점을 맞추어 계획된다. 현제 LID의 성능 및 적용성에 대한 다양한 연구가 진해되어지고 있으나, LID 요소기술별 시공 비용, 유지관리 비용, 강우유출수 저감효율, 비점오염원 저감효율, 적용위치 등의 다양한 인자를 복합적으로 고려하여 LID요소기술별 적용성 평가를 수행한 연구는 미미한 실정이다. 따라서 본 연구에서는 LID 요소기술 중 나무화분 여과장치, 옥상녹화, 빗무정원, 투수성포장, 침투트렌치, 빗물통, 식생수로 등의 총 7가지 LID 요소기술을 대상으로 연구를 수행하였다. LID 요소기술의 적용성평가를 수행하기 위해 시공비용, 유지관리비용, 강우유출수 저감효율, 비점오염원 저감효율, 적용위치 등의 촐 5가지 평가인자를 Entropy 방법을 이용하여 평가인자별 가중치를 산정하였다. 이후 다기준의사결정 방법 중 PROMETHEE 방법을 이용하여 LID 요소기술의 우선순위를 산정하였다. 현제 PROMETHEE 방법을 이용하여 LID 요소기술별 우선순위를 산정한 결과 옥상녹화가 첫번째 우선순위로 분석되었으며, 침투트렌치, 나무화분여과장치, 투수성포장, 식생수로, 빗물통, 빗물정원 순으로 분석되었다. 따라서 국내에 LID를 적용할 경우 옥상녹화, 침투트렌치, 나무화분 여과 장치 등의 LID 요소기술의 적용성 및 기대효과가 클 것으로 판단된다. 그러나 국내의 모든 지역을 대상으로 적용하기에는 문제가 있으며, 국내 LID 요소기술 적용 시 기초자료로 사용될 수 있을 것으로 판단된다. 대상지역별 신뢰도 높은 LID 요소기술 적용성 평가를 위해서는 대상유역 내 시공된 LID 요소기술을 계측하여 비점오염원 및 우수유출수 저감효율, 시공 비용, 연간 유지관리 비용을 분석하여 평가를 수행되어 한다고 판단된다.

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Derivation of Sustainability Factors of LID Facility and Strategy of Citizen Participation for Management (LID 시설의 지속가능성 관리인자 도출 및 시민참여 관리방안)

  • Kim, Youngman;Kim, Lee-hyung
    • Journal of Wetlands Research
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    • v.21 no.1
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    • pp.57-65
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    • 2019
  • LID(Low Impact Development) facility classified as a social infrastructure can maintain landscape sustainability and functional sustainability through continuous maintenance and management. Since LID is a natural-based solution, the sustainability can be secured through the management of weeds, wastes and vegetation. The LID facility is distributed in the city and is an infrastructure that can be managed through citizen participation because of simple maintenance. Therefore, this study was conducted to investigate the maintenance factors affecting the sustainability of the LID facilities and to suggest measures for maintenance by investigating the participation of the peoples. The factors for landscape sustainability were derived to waste and weed management. Also the factors for functional sustainability were assessed to identification and management of dead bodies and selection of applicable soil and plant species. The citizens showed high agreement of more than 80% in the questionnaires on expanding and managing LID facilities, enacting LID ordinances, and participating in the national movement. The intention to participate in LID management linked to jobs was about 64%, indicating that LID could become a job for the vulnerable. Maintenance of the LID can easily be carried out by non-specialists, which can lead to citizen participation with low cost for each facility. The maintenance cost for citizen participation can be allocated from the social infrastructure management cost reduced by LID application of the local government and the social welfare budget of the central government.

Manual Development for Korean Low Impact Development Factility Maintenance (한국형 저영향시설(LID) 유지관리 매뉴얼 개발)

  • Lee, Inhwa;Ahn, Jeahwang;Yu, Myungsu;Yi, Jaeeung;Kang, Jisook
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.602-602
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    • 2016
  • 우리나라에서는 1960년대부터 현재까지 도시화가 급속도로 진행되고 있다. 도시화가 진행됨에 따라 대부분 농경지로 사용되었던 토지의 이용 방법이 변화하였고 포장면적이 증가하면서 불투수면적과 강우유출량 또한 증가하였다. 이러한 현상으로 인해 도심지의 유출량이 증가하여 도심홍수가 빈번해지고, 비점오염물 증가로 인한 수질악화 등의 환경 문제가 더욱 심화되고 있다. 따라서 도시화로 인한 피해를 저감시키고 물순환 체계를 효율적으로 관리하기 위한 저영향개발(LID, Low Impact Development) 기법의 필요성이 대두되고 있으며, 그로 인해 LID 기법의 가치가 재조명되고 있다. 현재 LID 기법과 관련된 많은 연구가 진행되고 있지만 LID 시설물에 대한 이해와 유지 관리 필요성에 관한 연구가 미흡한 실정이다. 따라서 본 연구에서는 LID 기법을 보다 쉽고 효율적으로 적용하기 위해 국내 9종의 매뉴얼과 국외 2종의 매뉴얼을 검토하여 국내 실정에 적합한 LID 시설 유지관리 기법을 고안하여 LID 개념을 통합적으로 정립하였으며 LID와 관련된 시설물, 모니터링 요소, 유지관리 등의 기술적인 정보를 제공하기 위한 한국형 LID 시설유지관리 매뉴얼을 작성하였다. 매뉴얼은 첫째, LID 전반적인 이해를 돕기 위해 LID 정의, LID 시설물의 종류, 설치기준 및 운영 관리기준에 대한 내용을 다루고 둘째, LID 시설물의 특징, 구성, 설치가능 지역, 설치 시 고려사항, 유지관리 기법, 설치 예에 대한 내용으로 구성하였으며 이외에도 시설물의 일반적인 점검사항, 토지이용별 고려사항 등 시설물 설치 후 점검 방법, 유의사항 등을 제시하였다. 향후 매뉴얼의 타당성을 검토하기 위해 부산대학교 양산캠퍼스에 완공된 LID 실증단지의 시범 LID 시설물에 적용하여 국내 LID 시설물에 대한 매뉴얼의 적용성을 높일 예정이다.

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Development of the model for predicting pollutants from the Low Impact Development (LID) (저영향개발(LID)의 비점오염물질 예측을 위한 모형 개발)

  • Baek, Sangsoo;Cho, KyungHwa;Pachepsky, Yakov
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.58-58
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    • 2018
  • 지난 10년 동안, 저영향개발(LID)에 대한 관심이 증가해 왔다. LID는 도시 하천의 지속 가능성을 높이고 도시 홍수와 가뭄 및 비점오염에 대한 환경적 영향을 감소시켰다. 불투수지역이 확산됨에 따라 LID는 도시 지역의 홍수를 방지하고 수문학적 기능을 강화하기 위한 전략 중 하나로 제안되고 있다 최근 계속적인 도시화와 개발로 인해 불투수층이 증가함에 따라, 도시비점오염물질이 동반된 표면유출수가 증가하고 있다. LID는 도시 환경에서 많은 이점을 지니고 있지만 LID 구조물의 운영 및 관리와 설치에는 높은 비용이 필요하다. 반면에 수학적 모델은 적은 비용으로 LID의 수문학적 과정을 분석하고 예측할 수 있는 유용한 도구이다. EPA SWMM은 이러한 LID 예측 및 분석하는 데 많이 사용 되고 있으며, 도시 유출 관리에 널리 사용되고 있다. 하지만 EPA SWMM의 LID 모듈의 경우, LID내의 오염물질 모의를 위한 기작이 없다. 이러한 점은 LID를 이용하여, 비점오염물질 저감을 예측하기에는 한계점을 보여준다. 이에 본 연구에서는 이러한 문제점을 개선하기 위하여, EPA SWMM LID 모듈에 오염물질 거동 기작을 추가하였다. 개발된 모형은 Bioretention과 infiltration trench를 모의를 하였으며, 모의 오염물질로는 TSS, TN, TP, COD 이다. 모의 결과 모델이 자연현상을 잘 모의 하고 있음을 보여주었다. 향후, 이 모형을 이용하여 도시 내 LID 시설의 오염물질 예측이 가능할 것으로 예상된다.

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Effect of Regional Climate Change Projected by RCP Scenarios on the Efficiency of Low Impact Development Applications (RCP 시나리오에 따른 지역의 기후변화가 저영향개발 기법 효과에 미치는 영향)

  • Jeon, Ji-Hong;Kim, Tae-Dong;Choi, Donghyuk
    • Journal of the Korean Society of Urban Environment
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    • v.18 no.4
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    • pp.409-417
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    • 2018
  • This study elicited the necessity of considering regional climate change on Low Impact Development (LID) application by evaluating its effect on LID efficiency. The relationship between climate change factors and LID efficiency was evaluated with Representative Concentration Pathway (RCP) showing the increase of annual precipitation and representative evapotranspiration. Simply lowering lawn surface (LID3), a practical option to increase retention and infiltration effect, demonstrated hydrological improvement above two conventional options, bioretention with green roof (LID1) and bioretention only (LID2). High runoff reductions of applied options at RCP 4.5, supposing taking efforts for mitigating green house gases, revealed that climate change countermeasures were preferable to LID efficiencies. The increase of precipitation had more influence in hydrological change than that of reference evapotranspiration.

Awareness of Urban Environment and LID for Expanding LID Application (LID 적용확대를 위한 시민의 도시환경 및 LID 인식)

  • Kim, Youngman;Kim, Lee-hyung
    • Journal of Wetlands Research
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    • v.21 no.1
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    • pp.27-33
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    • 2019
  • The future water management needs decentralization of facilities, diversity of technology and integration of management to overcome the waste of financial resources and increase in scale of facilities that occurred from centralized water management. In addition, citizen's environmental awareness and participation is important because all infrastructure installed in the watershed where citizens live should have the function of water management. Therefore, the research was performed by investigating the citizen's recognition about urban environment와 LID application to analyze citizen's perceptions and analyze the feasibility and possibility of LID application. The LID awareness of citizens was about 59%, but only about 46% of citizens agreed on the extension of application. However, after contacting LID photographs and information, 90% of respondents agreed on the application of LID, and 94% of respondents were able to distinguish between grey infrastructure and LID infrastructure. Citizens appeared to have a tendency to recognize green spaces as multi-functional LID infrastructure or green infrastructure. If citizens recognize multi-functional LIDs only as landscapjng area, it will be very difficult to extend the LID on the city areas. Therefore, for the extended application of the LID facilities, it is necessary to use public relations strategy to utilize the results and visual data on the actual effect verification. In addition, as every social infrastructure is formed in watershed where citizens live, it is necessary to plan and manage the infrastructure through governance with citizen participation.

Key Factors Influencing Low Impact Development Adoption by Local Governments (지방정부의 저영향개발 적용에 영향을 주는 요인 연구)

  • Jeong, Moonsun;Koebel, C. Theodore;Bryant, M. Margaret
    • Journal of Environmental Impact Assessment
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    • v.24 no.2
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    • pp.119-133
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    • 2015
  • The paper reports on exploratory research into the factors influencing adoption of low impact development (LID) regulations by local government. The research uses ten case studies ranging from low to high level adoption of LID in Virginia. Based on the theory of diffusion of innovations, perceived characteristics of LID, characteristics of the adopting local government, motivations of the adopter, and the surrounding organizational context of the adopter are chosen for the key factors influencing on LID adoption. By reviewing the local governments regulations related to stormwater management, meeting minutes, reports and documents, and in-depth interviews, the evaluation of the key factors and the local LID adoption was conducted. As a result, adopters with a high level of LID adoption at the time of the study were heavily influenced by champions of LID within local government and communities. In contrast, moderate level adopters and low-level adopters emphasized the importance of external forces like state regulatory mandates and the need for clear models to implement.

Evaluation of Water Cycle Improvement in LH Institute Using SWMM-LID Model (SWMM-LID 모델을 이용한 토지주택연구원의 물순환 개선효과 평가)

  • Jung, Jong-Suk;Jung, Kwang-Wook;Kang, Suman;Hyun, Kyong-Hak
    • Journal of Korean Society on Water Environment
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    • v.34 no.3
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    • pp.308-315
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    • 2018
  • SWMM-LID was calibrated with flow monitoring data in LHI to evaluate runoff after LID application. The flow rate in the B basin was estimated to be 0.94 and 6.15 for O/S and $D_v$, respectively. In the A and C basins, the difference between the observed and simulated data was greater than in the B basin. As a result of runoff reduction efficiency by the application of LID facilities, the change of infiltration increased from 34.6 % to 45.8 % in the entire watershed, and the runoff decreased from 58.8 % to 46.3 %. In the runoff reduction of each LID facility, rain garden E showed the highest effect with 99.9 % and bioretention B showed the lowest effect with 27.5 %. In order to evaluate the efficiency of each LID facility, a comparison is made between the pore volume (V) of the LID and the catchment area (A). The runoff showed a runoff reduction effect of about 70 % above the 0.1 volume/area (V/A) value. As a result of examining the runoff reduction with LID facilities by the LID module of SWMM, a reasonable design is possible by reflecting the appropriate LID volume to drainage area.