• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.2093-2097
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• 2009

수제는 본래 제방의 보호나 주운의 수심확보 등을 주목적으로 주로 호안 또는 하안 전면부에 설치되어지는 구조물이다. 과거에 하천이 주운으로 이용되었던 시기와는 달리, 제방축조기술 등의 발달에 따라 그 역할이 점차 줄어들면서 주역할 기능이 사라지게 되었다. 하지만 최근에 수제의 설치로 인한 수제역 내의 역흐름과 재순환영역이 하천환경을 개선시킨다는 기능이 주목받으면서 국부적인 침식과 퇴적을 유도하여 다양한 생태환경을 제공하는 수제의 효용이 재인식되고 있다. 하천의 주운용 수심을 확보함과 동시에 생태서식환경을 개선시키기 위한 수제 설치가 주요한 공법으로 재인식되어, 일정 수위확보로 수생태계의 교란을 억제하고 하천의 황단적 단류를 막아 건습교체를 억제하는 등의 하천생태계의 유도가 필요하다. 따라서 본 연구에서는 하도에 수제를 설치함으로서 생태하천을 창출하기 위한 수제기법을 제시토록 하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.2085-2089
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• 2008

수자원 개발이 자연 하천 생태계에 미치는 다양한 악영향들은 하천에 서식하는 동 식물의 생태서식지의 변화를 초래할 수 있다. 하천생태계를 보전하고 복원하기 위해서는 수리학과 생물학이 연계된 생태수리학적 모형을 지속적으로 연구 개발하여 수자원 개발에 따른 장래의 물리적인 거동을 비교적 정확하게 분석 및 예측하는 것이 필요하다. 본 연구의 목적은 21세기 프론티어 연구사업 'RAMS (River Analysis and Modeling System) 적용' 과제 중 개발된 RAM2, RAM4, RAM6 해석 모형으로부터 유속, 수위, 수온, SS, 하상고, 하상재료 데이터를 받아들여 GIS와 연계하는 2차원 하천 생태 모형 (RAM 8)을 개발하는 것이다. 그리고 개발에 따른 모형 검증을 위해서 우리나라 4대 강 중 유일하게 하구둑이 설치되어 있지 않아 자연적인 하천지형과 기수역 생태계가 잘 보존된 한강 하구부를 적용구간으로 선정하여, 서식지 적합성을 판단하고 그에 따른 적정 유량을 산정하여 1차원 서식처 모형인 PHABSIM을 이용한 결과와 비교한다.

• Journal of Korean Society on Water Environment
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• v.22 no.6
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• pp.977-981
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• 2006

In order to improve water quality in drinking water sources, Ministry of Environment (MOE) was implemented total water pollution load management (TWPLM) in all the major river basins. From the experience of the application of TWPLM, we could find some problems relating the target watershed, standard operating procedure (SOP) of establishment and implementation plan, water quality and flow rate, design flow, water quality model, margin of safety (MOS), and estimation of wasteload were found. The authors were reviewed ongoing TWPLM and presented the improvement schemes for a successful TWPLM. For the application of these suggestions, further detailed studies should be done to implement TWPLM in the future.

• Journal of the Korean Professional Engineers Association
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• v.42 no.2
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• pp.35-40
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• 2009

This article is summary of 'Korean Green New Deal' project which strives to revive Korea's Top 4 rivers for the next four years, between 2009 and 2012. The purpose of this project is balanced national development and recovered regional economy, creating new jobs. Details of the 'Korean Green New Deal' include means to reinforce obsolete embankments and to recover the river ecosystem by maintaining sedimentary soil, to install small- to middle-sized dams and flood control reservoirs and to establish eco-friendly reservoir for emergency water supplies. The project is expected to generate 190,000 new employee and create 23 trillion won worth production inducement effect, contributing in the revival of regional economies.

• Journal of the Korean Professional Engineers Association
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• v.42 no.2
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• pp.41-48
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• 2009

The Government declared 'Low-Carbon Green Growth' as the new national vision for future development to improve economic growth and quality of life through higher energy efficiency, less energy consumption, wider use of renewable energy, etc. Korea can no longer delay participating in international efforts against global warming by reducing carbon dioxide and other greenhouse gas emissions. Thus low-carbon green growth is not a matter of choice, and it becomes indispensible to sustaining the nation's economic development. The Government is determined to take the initiative in speeding up economic recovery by carrying out the large scale investment projects such as the Korean version of a 'Green New Deal. The 49 trillion-won projects include river improvement, eco-friendly transportation networks, advanced information infrastructure, water resources & dam construction, green cars & clean energy development, etc. which will create nearly one million new jobs over the next four years.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.631-633
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• 2018

국내 하수처리장의 수질기준이 강화되고 하수처리량이 지속적으로 증가하면서 하수처리장이 수용할 수 있는 처리용량의 한계와 이에 따른 관리 비용이 급격하게 증가하고 있다. 이러한 문제들을 개선하기 위한 다양한 방법들이 시도되고 있으나, 열악한 하수 환경과 높은 처리 비용 등으로 인하여 많은 어려움을 겪고 있는 것이 현실이다. 본 논문에서는 하수처리장으로 유입되는 하수를 오염도에 따라 하수량을 제어함으로서 하수처리장으로 유입되는 부하를 경감하여 하수 처리 비용을 줄이고, 환경 오염을 최소화 할 수 있는 친환경 하천 생태계 보존을 위한 IoT 기반 하수정보화 플랫폼을 제안하고자 한다.

• Journal of the Korean Institute of Rural Architecture
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• v.17 no.2
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• pp.27-34
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• 2015

As part of the waterway restoration to renew traditional urban area, this paper is to assume and research Gyoseocheon(Gyoseo waterway) in Late 1960s Cheongju Korea. The main stream of Gyoseocheon flew from Sangjwagol(the head of the valley) of Uam Mt. to the north gate under Cheongju castle at first, and meandering from Sangdang Park, flew through Sudongseongdang and Bangadari Road to Musimcheon since open railroad of 1920s. This waterway, the eco-friendly figure of Gyoseocheon, that flew to inside the downtown with a planted tree and that is open space was so. The sub stream of Gyoseocheon originated in Seoundong and Tapdong were divided into two parts. One was to join the main stream of Gyoseocheon on Sangdang Park via Munhwadong, and the other was to join the sub stream of Musimcheon at northwest corner via south and west gate of Cheongju castle. This waterway as branch sewer were built into the road culvert.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.5
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• pp.487-498
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• 2010

This article presents an effect of deicer such as $CaCl_2$(calcium chloride) and EFD(Eco-Friendly Deicer) composed by organic acids on the survival and growth of plant. Pine and bush clover which are main natural species on the road side, and young radish and kidney bean which are cultivation species used in this test that responses of survival and growth were analyzed as grade concentration of deicers. Bush clover showed the most sensitive survival response among 4 species to the deicer. Pine growth didn't have statistical significance as the kind of deicers and concentration variation, but growths of bush clover and kidney bean showed growth inhibition in concentration more than 3% of $CaCl_2$ and EFD1. The results of survival and growth for $CaCl_2$(calcium chloride) demonstrated that young radish and pine are tolerant species and bush clover and kidney bean are sensitive species. Although EFD1 manufactured by chemical showed the negative effect on the survival and growth of plants, EFD2 made with waste compost was confirmed that it has the positive influence to the survival and growth of the both sensitive and tolerant plant species for chloride.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.2
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• pp.317-324
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• 2012

To reduce non-point source pollutants in Juam Lake eco-wetlands, purification efficiencies of pollutants were investigated at three different systems. The constructed wetlands (CWs) consisted of A system, B system and C system. A system consisted of $1^{st}$ free water surface (FWS) CW, $2^{nd}$ FWS CW, $3^{rd}$ FWS CW, $4^{th}$ subsurface flow (SSF) CW and $5^{th}$ SSF CW. B system consisted of $1^{st}$ FWS CW, $2^{nd}$ FWS CW, $3^{rd}$ FWS CW, $4^{th}$ FWS CW and $5^{th}$ SSF CW. C system consisted of $1^{st}$ FWS CW, $2^{nd}$ FWS CW, $3^{rd}$ FWS CW, $4^{th}$ FWS CW and $5^{th}$ SSF CW. The concentrations of BOD, COD, SS, T-N and T-P in inflow ranged 0.20 ~ 0.91, 1.24 ~ 8.00, 0.60 ~ 8.60, 0.04 ~ 2.50 and $0.001{\sim}0.685mg\;L^{-1}$ from March to October in 2011, respectively. Removal rates of BOD, SS, T-N and T-P were high in Autumn, Spring, Spring and Summer, respectively. In A system, $1^{st}$ FWS CW, $2^{nd}$ FWS CW and $3^{rd}$ FWS CW were dominated by Leersia oryzoides. In B system, $1^{st}$ FWS CW, $3^{rd}$ FWS CW and $4^{th}$ FWS CW were dominated by Leersia oryzoides. In C system, $2^{nd}$ FWS CW and $3^{rd}$ FWS CW were dominated by Nymphaea teragona.

• Journal of Wetlands Research
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• v.21 no.spc
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• pp.69-79
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• 2019

In Korea, more than 60% of the whole lands are mountainous area. Since many decades ago, hydroelectric power plants have been constructed and eco-friendly energy has been produced. Hydropower can cope with the rapidly changing energy supply and demand, and produce eco-friendly energy. However, when the reservoir is built, it is often inevitable to damage the environment due to construction of large structure. In this study, the optimal reservoir operation model was developed to maximize power generation by monthly operation for long-term operation planning. The dam operation model was developed using the linear programming which is widely used in the optimal resources allocation problems. And the reservoir operation model can establish monthly operation plan for 1 year. Linear programming requires both object function and constraints to be linear. However, since the power generation equation is nonlinear, it is linearized using the Taylor Expansion technique. The optimization results were compared with the 2009-2018 historical data of five hydropower reservoirs. As a result, the total optimal generation is about 10~37% higher than the historical generation.