• 한국농공학회지
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• 제44권6호
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• pp.124-136
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• 2002

A freshwater lake water quality management system(FLAQUM) was developed to help regional manager for the water quality of a rural basin. The integrated user interface system FLAQUM written in Visual Basic, includes three subsystems such as a database management system, basin pollutant loads simulation model using SWMM model and freshwater lake water quality simulation model using WASP5 model. Pollutant load simulation model was applied to simulate the discharge and pollutant loading from the watershed, and freshwater lake water quality model was applied to analyze the changes in water quality with respect to watershed pollutant loads, and this model could be used in planning to control watershed pollutant source for water quality management. Database management system was constructed fur all input and output data processing, and it can be used to analyze statistical characteristics using constructed data. Results are displayed both graph and text for convenience of user. The results of FLAQUM application to Boryeong freshwater lake showed that the lake was in eutrophic condition. The major contribution of pollution comes from tributary No.1 and No.4, which have a large number of livestock farms. Therefore, water quality management must be focused on appropriate management of the livestock farming in the two breanchs.

• 환경영향평가
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• 제18권2호
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• pp.59-67
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• 2009

Water quality of the Lake Youngrang in the Sokcho City is eutrophic. Jangcheon is the largest inflow source to the lake. Major pollutant sources are stormwater runoff from resort areas and various land uses in the Jangcheon watershed. A storm sewer on the southern end of the lake is also an important pollution source. In this study, water quality modelling for Lake Youngrang was carried out considering the rainfall-runoff pollution loads from the watershed. The rainfall-runoff curves and the rainfall-runoff pollutant load curves were derived from the rainfall-runoff survey data during the recent 4 years. The rainfall-runoff pollution loads and flow from the Jangcheon watershed and the storm sewer were estimated using the two kinds of curves, and they were used as the flow and the boundary data of the WASP model. With the measured water quality data of the year 2005 and 2006, WASP model was calibrated. Non-point pollution control measures such as wet pond and infiltration trench were considered as the alternative for water quality management of the lake. The predicted water quality were compared with those under the present condition, and the improvement effect of the lake water quality were analyzed.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2001년도 학술대회
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• pp.80-81
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• 2001

• 한국동물학회:학술대회논문집
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• 한국동물학회 2000년도 한국생물과학협회 학술발표대회
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• pp.145.1-145
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• 2000

No Abstract, See Full Text

• 생태와환경
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• 제42권2호
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• pp.161-171
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• 2009

국내산 담수 이매패 펄조개를 이용하여 부영양 저수지의 표층수를 실험실로 유입 처리하고 처리수는 다시 저수지로 환원하는 이른바 '흐름형 유기물 제어'(CROM: continuous removal of organic matters) 기술을 개발하고 하천에서 채취한 모래퇴적물의 첨가가 유기물 제어와 수질에 어떠한 영향을 주는지 조사하였다. CROM은 크게 저류조, 조정조, 처리조, 분석조 등으로 이루어졌으며, 실험은 처리조에 현장수, 현장수+모래, 현장수+패류, 현장수+모래+패류 등을 각각 구성하여 유업속도는 18${\sim}$25 L $h^{-1}$ 패류밀도는 486.1 indiv. $m^{-2}$, 수온은 15${\sim}$22$^{\circ}C$ 범위에서 13일간 실시하였다. 유기물 및 수질 변화를 확인하기 위하여 매일 동일한 시간에 수온, pH, DO, 전도도, 탁도, 염분도, 엽록소 a, 부유물질, TN, TP, $NO_2$, $NO_3$, $NH_3$, $PO_4$ 등을 측정하거나 채수하여 곧바로 분석하였다. 연구결과, 미처리수의 반송이 패류의 유기물 제어에 큰 영향을 미치지 않았으며 퇴적물의 첨가에 상관없이 실험기간 동안 80% 이상 유기물(부유물질 빛 ChI-a)을 감소시켰으나 높은 농도의 암모니아와 인산 등을 배출하였다. 결국 한국산 이매패 펄조개를 이용한 CROM 운영효과는 매우 뚜렷하였으나 장기간 운영시 유기물 제어능 및 패류 생존율에 미치는 다른 요인들-수온, 미생물, 세정주기 등의 변화가 예상되며, 처리수에 대한 처리 및 활용에 대한 다각적인 연구가 뒤따라야 할 것으로 사료되었다.

• 환경영향평가
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• 제9권4호
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• pp.291-300
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• 2000

Juam lake is a major water reservoir for the industrial and agricultural activities as well as the residental life of Kwangju and Chonnam regions. However, the water quality of the lake is getting worse due to a large quantity inflowing to the lake. The excessive growth of algae by the overfertilization may result in water treatment problems and also the interference with desirable water uses of navigation, aesthetics, recreation, and aquatic ecosystem. Thus the purpose of this study is to investigate the species and their amount of planktons in the lake and the relationship between the P loading amount and the chlorophyll-a used as a primary productivity index. The results of the investigation show that (1) the predominant species of algae are Microcystis aeruginosa, Anabaena affinis, Melosira granulata, Synedra acus, and Coelastrum cambricum, (2) the trophic state of the lake can be classified as eutrophic, and (3) there is close relation between the P loading amount and the chlorophyll-a.

• 한국수산과학회지
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• 제19권1호
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• pp.67-71
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• 1986

우리나라 남서부에 위치하고 있는 인공호인 옥정호의 환경보전의 목적하에 식물 plankton의 생장과 관계가 깊은 $vitamin\;B_{12}$의 분포와 기타 물리, 화학 및 생물학적 요인과의 관련성을 토대로 옥정호수의 환경오염의 정도를 검토한바 다음과 같은 결과를 얻을 수 있었다. 1. COD와 $Cl^-$의 양은 1981년에 조사된 수치보다 높았다. 2. 호수중의 영양염의 양은 부영양호의 일반적 기준치를 상회하며 특히 인산염의 함양은 $0.175{\sim}0.225mg/{\ell}$ 이었다. 3. chlorophyll a 함양은 $1.1{\sim}8.7mg/{\ell}$이었고, 4. 식물 plankton의 생장과 관련성이 깊은 $vitamin\;B_{12}$의 함양은 $1.25{\sim}6.0mg/{\ell}$이었다. 위와 같은 결과로 미루어 볼때 옥정호수는 station에 따라 차이는 있었으나 부영양호로서 규정하는 상태에 놓여있음을 알 수 있었다.

• 상하수도학회지
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• 제22권5호
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• pp.523-529
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• 2008

Algal blooms in a local eutrophic lake often produces the musty and earthy taste & odor problems. Since the odor causing compounds(OCCs) including geosmin and 2-MIB have their own volatility, the OCCs can be removed from water by air stripping methods. Removal of TON(threshold odor number) as an index for OCCs could be fitted well with the first order equations($R^2=0.9$ above), where the air stripping coefficient of TON, k was in the range between 0.0055 and 0.0097 according to the aeration time. k within 30min aeration tests was 0.0097, while it was 0.0055 where the aeration time extended to 150min. With 15 mg/L of PAC, removal of TON was not simulated with 1st order equation within 30min aeration. Within 30min aeration, OCCs rather than geosmin and/or 2-MIB could be removed easily by air stripping or PAC adsorption, while OCCs such as geosmin and/or 2-MIB could be removed slowly by air stripping after 30min aeration. Geosmin and 2-MIB were not readily removed by air stripping(k of them were 0.0018~0.0047 and 0.0018~0.0034, respectively at different air flow rates). Geosmin could be removed by air stripping a little better than 2-MIB.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2002년도 추계학술대회 논문집
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• pp.251-255
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• 2002

Eutrophic matters accumulated on the bottom of sea, river and lake cause red tide phenomenon in ocean and outbreak green algae in river and lake. Systems are developed to remove the noxious deposit. But the existing systems remove not only the eutrophic matters but also natural materials, sand, pebbles etc. that should remain at the bottom. This paper describes a new system that can safely, and economically take away the noxious deposit in underwater. High pressure water jet is used to induce vortices in the triangular suction section, and air-lifting pump to lift up the deposit. The mixture of the water and deposit is filtered through the drum filters. An under camera shows the under water situation along the moving direction of the system that is controlled by a remote operator. This remote controlled moving system obliterate the necessity of the diver that usually costs high. The experimental results show the effectiveness of the suggested system.

• 한국물환경학회지
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• 제26권3호
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• pp.518-524
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• 2010

Continuous removal of organic matters (CROM) using freshwater bivalve Anodonta woodiana was operated to evaluate the effect of water current on the water quality improvement (clearance) of eutrophic lake. The CROM system comprised three treatment steps such as flow control, treatment and analysis, and operated at the two different currents ($24L\;h^{-1}$ and $48L\;h^{-1}$) with mussels at density of $312.5indiv.\;m^{-2}$ for 12 consecutive days. Water quality including suspended solids (SS) and chlorophyll-a (Chl-a) was daily measured at the same time. Results indicate that although both the system strongly decreased the concentration of SS and chl-a, a slow CROM system was more effective to diminish the SS contents than a fast CROM system; 82% and 66%, respectively (ANOVA, P<0.0001). Clearance rates, based on chl-a, were also significantly higher in a slow system than a fast system (ANOVA, P<0.0001), although the mussel mortality was conversely. In both systems, there showed a remarkable excretion of dissolved inorganic nutrients (i.e. $NH_3-N$ and $PO_4-P$), while a slow CROM system was higher than a fast system, significantly (ANOVA, P<0.0001). Therefore, it may suggest that a slow current CROM system is more suitable to maximize the efficacy of water quality improvement, but further study is needed to diminish the mortality of mussel and to reuse the nutrient released during the operation.