• 제목/요약/키워드: Lake

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기수호의 습성천이 현상과 생태적 복원정책 (On the Realities of Hydrach Succession in Brackish Water Lakes and Ecological Restoration Policy)

  • 신승춘;박용길
    • 한국환경과학회지
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    • 제13권1호
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    • pp.11-17
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    • 2004
  • The purpose of this study is to present the model of ecological restoration through analysis on the condition of hydrach succession process in brackish water lake. To this study, we investigate and research the present condition of brackish water lake in South Korea. Most brackish water lake in South Korea have characteristics that is come into being malignant hydrach succession. Many lakes were reclaimed to increase foodstuff production. And river conservation work seperate lakes from the ocean. In a embryological view, most lakes based on the brackish water lakes, But present lakes show many different types such as a fresh water lake, a salt lake, a brackish water lake, a swamp, and a marshland. As a result, brackish water lakes have greatly damaged by diverse artificial interventions to promote people's activities. Therefore, in order to manage brackish water lakes systematically, criteria of lake preservation must be coincide with the present conditions of hydrach succession in each lake.

SWMM과 WASP5모형을 이용한 간척지 담수호의 수질거동 특성 조사 (Behavior of Water Quality in Freshwater Lake of Tide Reclaimed Area Using SWMM and WASP5 Models)

  • 김선주;김성준;이석호;이준우
    • 한국농공학회지
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    • 제44권2호
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    • pp.148-160
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    • 2002
  • Lake water quality assessment information is useful to anyone involved in lake management, from lakeshore owners to lake associations. 11 provides lake water quality, which can improve how to manage lake resources and how to measure current conditions. It also provides a knowledge base that can be used to protect and restore lakes. SWMM was applied to simulate the discharge and pollutant loads from Boryeong watershed, and WASP5 was applied to analyze the changes of water quality in Boryeong freshwater lake. In each model, the most suitable parameters were calculated through sensitive analysis and some parameters used default data. Simulated in SWMM and measured discharge showed the accuracy of 88.6%. T-N and T-P exceeds the criteria in the simulation of water quality in Boryeong freshwater lake, and control of pollutant loads in the main stream showed the most effective way. Integrated water quality management system was developed to give convenience in the operation of SWMM and WASP5 and data acquisition.

퇴적물 토양의 영양염류가 호소 수질에 미치는 잠재 요인 분석 (Analysis of Sediment Nutrients as Potential Sources of the Lake Water Quality)

  • 정준오;김영우
    • 한국환경보건학회지
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    • 제35권5호
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    • pp.376-385
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    • 2009
  • The characteristics of Lake Cheonhoji water and sediment were investigated in oder to utilize these as fundamental materials for the management of lake water quality. The hydrographic properties of Lake Cheonhoji which are relatively low chance of nutrients loading from the watershed and a long retention time of lake water, lead to the probability of high lake productivity. It was also observed that lake water showed stratification during summer and complete mixing during fall, even though water depth was relatively shallow. The trophic state was eutrophic to hypertrophic from summer to late fall. The overall properties of the sediment were oligohumic, high ignition loss and high composition of NAIP and Resid.-P, which might serve as potential pollution sources of lake water quality. In laboratory scale experiments, it was observed that leaching potential of nutrients in the sediment was greatly dependant upon water temperature and dissolved oxygen. Finally, water pollution in Lake Cheonhoji was considered to be largely due to the adverse cycle of uncontrollable eutrophication, which resulted in the subsequent occurrence of dead algae and animal plankton, organic sedimentation, reduction of dissolved oxygen and nutrients leaching, which again reinforced the cycle of eutrophication in the lake.

청평호 및 팔당호 어류군집 비교 연구 (The Comparative Study on the Fish Community in Lake Chungpyung and Lake Paldang)

  • 박혜경;이장호;윤석환;최명재
    • 한국물환경학회지
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    • 제29권1호
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    • pp.7-18
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    • 2013
  • We compared the structure of fish community and condition of major fish species in Lake Chungpyung and Lake Paldang, which are relatively shallow, meso-eutrophic, cascading dam reservoirs on the North Han River. Two lakes have wide littoral zone in the lakeside providing similarly good habitat for fishes, whereas fishery and water recreational activities such as motorboating, water skiing are allowed in Lake Chungpyung but are prohibited in Lake Paldang. The average lengths of large size fishes in Lake Chungpyung are shorter than those of same species in Lake Paldang, resulting in the slight distortion of generation distribution of those species in Lake Chungpyung, possibly owing to the active fishery such as fixed shore net fishing, gill net fishing and angling. Meanwhile the condition of fishes represented by the length-weight relationship of fish species did not show the significant differences between two lakes and showed normal condition. To evaluate the impact of physical disturbance such as loud noise and turbulent wave from water recreational activities to fishes precisely, further studies including physiological responses to stress an spawing activity should be needed.

시화호 표층퇴적물의 중금속 및 퇴적상 변화 (Change of Heavy Metals and Sediment Facies in Surface Sediments of the Shihwa Lake)

  • 최만식;천종화;우한준;이희일
    • 한국환경과학회지
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    • 제8권5호
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    • pp.593-600
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    • 1999
  • In order to determine the changes of sediment facies and metal levels in surface sediments after the construction of Shiwha Lake, surface sediments were sampled at 8 sites located on the main channel monthly from June, 1995 to August, 1996 and analysed for 12 metals (Al, Fe, Mn, V, Cr, Co, Ni, Cu, Zn, Cd, As and Pb) by ICP/AES and ICP/MS. Two groups of sampling sites(the inner lake with 3 sites and the outer lake with 5 sites) are subdivided by the surface morphology ; the inner lake is a shallow channel area with a gentle slope, while the outer lake is relatively deep and wide channel with a steep slope which has many small distributaries. After the construction of dam, fine terrestrial materials were deposited near the outer lake, which resulted in the change of major sediment facies from sandy silt to mud. With the deposition of fine sediments in the outer lake, anoxic water column induced the formation of sulfide compounds with Cu, Cd, Zn and part of Pb. Metal (Cr, Ni, Cu, Zn and Cd) contents in sediments increased up to twice within 2 years after the construction of dam. This is due to the direct input of industrial and municipal wastes into the lake and the accumulation of metals within the lake. In addition, frequent resuspension of contaminated sediments in a shallow part of the lake may make metal-enriched materials transport near the outer lake with fine terrestrial materials. As the enrichment of Cu, Zn, Cd and part of Pb in the Shiwha Lake may be related to the formation of unstable sulfide compounds by sulfate reduction in anoxic water or sediment column, the effect of mixing with open coastal seawater is discussed.

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아산호와 충주호의 삼각망에서 채집된 어류 종 조성 및 강준치 (Erythroculter erythropterus) 개체군의 전장-체중 관계 분석 (Species Composition of Fishes Collected by Fyke Net and Length-Weigth Relationships of Skygager (Erythroculter erythropterus) in Asan Lake and Chungju Lake)

  • 허민아;안희춘;박민수;양영준;이완옥
    • 한국어류학회지
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    • 제33권4호
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    • pp.287-296
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    • 2021
  • 아산호와 충주호에서 2021년 6~9월 사이에 삼각망에서 채집된 어류의 종 조성과 강준치(Erythroculter erythropterus) 개체군의 전장 - 체중 상관관계를 조사하였다. 조사기간 동안 아산호에서는 6과 13종 4,977개체, 충주호에서는 8과 18종 2,436개체가 채집되었다. 아산호의 우점종은 생체량 및 개체수에서 모두 강준치로 각각 498,424 g (84.5%), 4,470 (89.8%)이었으며, 충주호의 우점종 또한 강준치로, 생체량 301,818 g (77.5%), 개체수 1,327 (54.5%)이었다. 우점종인 강준치의 전장분포도 분석을 통해 연령구조를 추정하였으며, 아산호에서는 만 1~2년생의 출현비율이 높아 개체군의 성장 가능성이 크고, 충주호에서는 만 2년생 이상의 고 연령군의 출현이 대부분을 차지하여 비교적 개체군의 성장이 억제될 것으로 사료된다. 강준치 개체군의 전장-체중 상관관계를 분석한 결과, 아산호와 충주호에서의 b 값은 각각 3.06, 3.04, 비만도(K) 기울기 값은 각각 0.000128, 0.000051로 모두 양의 생육상태를 보였다. 조사시기별 비만도 기울기 값은, 6월이 가장 높았고 산란으로 인해 7월에는 낮아졌으며 9월까지도 영양 상태를 회복되지 못하고 음의 기울기가 나타났다.

옥정호와 용담호에 서식하는 배스 Micropterus salmoides의 먹이생물 차이에 관한 연구 (Study on the Feeding Habits of Micropterus salmoides in Lake Okjeong and Lake Yongdam, Korea)

  • 이완옥;양현;윤승운;박종영
    • 한국어류학회지
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    • 제21권3호
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    • pp.200-207
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    • 2009
  • 도입시기의 차이에 따른 배스의 먹이생물을 비교하기 위해 배스 유입 후 약 20년이 지난 옥정호와 약 10년이 지난 용담호에서 2007년 3월부터 2009년 3월까지 배스를 채집한 후 먹이생물을 분석하였다. 두 조사지점의 먹이생물을 비교한 결과 옥정호 배스의 경우 어류가, 용담호의 경우 십각류가 가장 중요한 먹이생물임을 확인하였다. 두 조사지점 사이에서 나타난 십각류의 섭식 차이는 옥정호에 분포하는 십각류의 분포밀도가 용담호에 비해 낮음을 의미하는 것이며, 이러한 십각류의 분포 밀도 감소는 배스의 섭식활동에 의한 것으로 판단되었다. 한편, 용담호에서는 2007년에 비해 2008년 십각류의 섭식 비율이 감소하고 어류의 섭식 비율이 증가하였는데, 이 또한 옥정호에서 보여진 바와 같이, 배스의 섭식활동과 관련될 것으로 사료되었다.

Application of Water Quality Management System of Freshwater Lake

  • Kim, Sun-Joo;Kim, Phil-Shik;Lee, Joo-Young
    • 한국농공학회지
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    • 제45권7호
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    • pp.38-48
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    • 2003
  • Lake water quality assessment information is useful to anyone involved in lake management, from lake owners to lake associations. It provides lake water quality criteria, which can improve the ways how to manage out lake resources and how to measure current conditions. It also provides a knowledge base so that the lakes can be protected and restored. Here, the Freshwater Lake Water Quality Management System(FLAQUM) was developed. The results of FLAQUM application by scenario proved that pollutant load at rainfall by the nonpoint sources was much more than normal times at rainfall. From the result of Scenario I (pollutant source increase case), the concentrations of Boryeong freshwater lake were BOD 9.43mg/L, T-N 4.53 mg/L and T-P 0.21 mg/L, respectively, and those values exceed the standard of agricultural water. And in case of Scenario I and II(the present case) excluding Scenario III (pollutant source decrease case), all of T-N and T-P are either mesotrophication or eutrophication, on the other hand when 60% of pollution source is removed, the concentrations of Scenario III were BOD 3.21 mg/L, T-N 0.95 mg/L, T-P 0.11 mg/L, respectively, and which satisfies the standard of agricultural water quality.

무기탄소 순환에 대한 소규모 호수 유역의 반응 (The Responses of a Small Lake Watershed to an Inorganic Carbon Cycle)

  • 조영일
    • 한국물환경학회지
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    • 제29권5호
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    • pp.610-617
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    • 2013
  • Investigating the budgets of alkalinity and dissolved inorganic carbon (DIC) in lake water systems is significant for the examination of the behavior of a lake as a sink or a source with respect to the circulation of inorganic carbon chemistry. Budgets of total alkalinity ($Alk_T$) and DIC in Onondaga Lake, which was polluted by chronic calcium (Ca) loading in spite of the closure of soda ash ($Na_2CO_3$) facility, were determined by the analyses of inorganic carbon chemistry in tributary stream channels linked to the lake. AlkT and DIC fluxes of Onondaga Creek and Ninemile Creek occupied 65% and 54%, respectively, as larger tributary streams in comparison with other tributaries as well as different input sources. Budget calculations indicate that 18% of AlkT and 11% of DIC inputs to Onondaga Lake, respectively, remained immobilized in the Lake. This suggests that Ca chronically leached had been precipitated with inorganic carbon or remineralized by secondary mineral formation during the experimental period. In this study, the assumed mass balance calculation in Onondaga Lake with tributary streams resulted in exhibiting that the lake played a role of the sink for the inorganic carbon cycle.