• 환경영향평가
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• 제18권4호
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• pp.235-243
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• 2009

Wetlands considered to be an important natural resources because they provide biodiversity and habitat for species to breed and survive. In this regard, many countries in the world provide wetlands and have policies and laws to protect them. In Korea we hosted RAMSAR COP-10 at Changwon in 2008 representing Korea's endeavor to wetland protection. But, in the process of development Wetlands are easy target to be lost due its easy access and the laws and regulations to protect them are relatively weak. Thus, this research focused on the introduction of No Wetland Loss(NWL) and we can achieve wetland protection in the economy market ways. Thus, NWL should consider 1) a clear definition of NWL and harmony and consensus of introduction of NWL, 2) considering most wetlands be private we need a financial support for securing wetlands, 3) inventories for wetlands in Korea, draw a line of demarcation, technic to evaluate wetlands, 4) wetland restoration considering function of ecosystem not total amount of wetlands. Wetland protection should be a part of Basic Law of Water Management which in its progress and we need further studies on wetland protection because of watershed management, deserted agricultural paddies, etc.

• 환경영향평가
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• 제17권2호
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• pp.105-112
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• 2008

Human activity has been the major threat to wetlands. Agriculture, industrial development, and urban and suburban sprawl have caused the greatest losses of coastal wetlands. In fact, riceland agriculture, because of the flooding that goes with it, provides some additional wetland habitat not otherwise available. The biggest current source of loss for freshwater coastal wetlands is from urban sprawl. In this study, spatial analysis method such as landscape index were applied to Sihwa area in Ansan city. The SMA (Spectral Mixture Analysis) method using Landsat image showed the change distribution of wetland vegetation from 1996 to 2004. The southern part of Sihwa wetland have been changed with Suda japonica of 24% and reed vegetation of 34% on coastal wetland which were covered with tidal flat.

• 한국습지학회지
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• 제10권3호
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• pp.27-35
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• 2008

Sediment cores were obtained from Upo and Mokpo in Upo Wetland and core samples were divided by depth into 20 ~ 21 subsamples. The heavy metal concentrations of Fe, Mn, Zn, AS, Cu, Cd, Ni, Pb, and Cr in the sediments of each depth were determined by ICP-MS. The texture of sediemnts from Upo Wetland appeared to be clayey silt with average grain size of $7.52{\sim}11.15{\mu}m$ for physical properties. It was found to have a clear tendency of depth profile with respect to TOC and ignition loss. Organics were stabilized in the range of 0.5 ~ 0.7 % TOC and 8 ~ 9 % ignition loss in 30 years, whereas, the surficial sediments have the highest concentrations of about 3.0 % of TOC and 13 ~ 15 % ignition loss. Those are much higher than the values of the main stream, the Nakdong River, which reflects the deposit of biodegradable organics from plants and other lifes. The vertical distribution of heavy metals in two sediment cores was investigated to elucidate historical trends of heavy metals deposited into Upo wetland. The depth profile concentrations of each heavy metal were compared and discussed with the Concensus-Based Sediment Quality Guidelines for freshwater ecosystems. All the Cd data for the vertical distribution in the sediments were detected above PEC value for Cd, which predict harmful effects on sediment-dwelling organisms expected to occur frequently. The concentrations of Zn, Cu, and Cr in all sediment samples for depth profile were detected below the TEC values, which provided a basis predicting the absence of toxicity by Zn, Cu, and Cr.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.374-374
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• 2023

Groundwater is the main source of water on which relies many countries in case of emergency, this is the case of Japan in 2011 after the great Sendai Earthquake. This important resource is found to be heavily influenced by human induced factors such as wetland area reduction. For groundwater sustainable management in perfect cohesion with wetland it is important to understand the relationship between both resources. Wetlands have a strong interaction with both groundwater and surface water, influencing catchment hydrology and water quality. Quantifying groundwater-wetland interactions can help better identify locations for wetlands restoration and/or protection. This study uses observation data from piezometers and wetland to study the qualitative and quantitative aspects of the correlation. Groundwater level, wetland area, chemical, organic and inorganic contaminants are the important parameters used. the results proved that few contaminants in the wetland are found in groundwater and in general the wetland quality does not affect that much groundwater quality. The strong linear relationship found between wetland water level and nearest groundwater level proved that, in term of quantity, groundwater and wetland are strongly correlated. While wetland becoming dry, groundwater level has dropped in the region about 0.52m. The area of wetland was found to be lightly correlated with groundwater level, proving that wetlands dry has contributed to groundwater level declining. This study has showed that whilst rainfall variability contributed to the decline and loss of wetlands, the impacts from landuse changes and groundwater extraction were likely to be significant contributors to the observed losses.

• 한국습지학회지
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• 제21권2호
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• pp.132-139
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• 2019

식생과 지하수위 사이의 양방향 상호 작용은 습지 식생의 동역학에 많은 영향을 미친다. 본 연구에서는 지하수위에 의해 영향을 받는 습지 식생의 비선형 동역학이 분석된다. 지하수위에 대한 영향은 습지 식생의 지배방정식에서 손실 항으로 설명되며, 지하수위 변화에 따라서 습지 식생이 어떻게 서로 다른 두 개의 안정적인 상태로 수렴될 가능성이 있게 되는지를 살펴보게 된다. 이러한 개념적 접근법으로부터 지하수위 변화에 따라 현재 습지에 존재하는 식생이 소멸되어 다른 식생 종으로 안정화되는 대변환에 대한 취약성이 분석된다.

• Ecology and Resilient Infrastructure
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• 제8권2호
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• pp.120-132
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• 2021

서울시 생태경관보전지역은 자연환경보전법과 자연환경보전조례에 근거하고 있다. 2018년 제13차 람사르협약 당사국총회에서 '습지 생태계서비스 간편평가 도구'가 채택되었으며, 람사르습지 도시 인증제 항목에 습지 생태계서비스 평가 항목이 포함됨에 따라 이를 평가할 자료가 필요하다. 본 연구는 서울시 생태경관 보전지역 중 생태적 보전 가치가 높은 습지 5곳을 선정하여 InVEST 모델로 탄소저장량과 경제성 평가를 하고자 하였다. 연구결과는 탄천습지 3,674.62 Mg, 한강 밤섬 1,511.57 Mg, 고덕동 습지 5,007.21 Mg, 암사동 습지 7,108.47 Mg, 여의도 샛강 습지 290.27Mg으로 도출되었다. 이 중 탄천습지는 2013년의 탄천습지의 탄소저장량은 4,804.99 Mg로 탄소저장량 1,130.37 Mg 감소하여 실효탄소요금 평균값인 $16.06(US)를 적용하였을 경우, $15,910.58(US) 손실된 것으로 환산되었고, 기후변화에 따른 생산성과 생태계에 미치는 영향을 포함한 탄소의 사회적 비용 평균값인 $204(US)를 적용하였을 경우, $202,101.97(US) 손실로 도출되었다. 본 연구는 서울시 주요 습지지역을 선정하여 도심 속 습지가 주고 있는 자연자원의 가치를 평가하고자 하였다. 서울시 주요 습지의 생태적 가치 평가를 통하여 생태경관보전지역 보호 및 관리 방안의 기초자료로 활용이 가능할 것으로 판단된다. 또한, 습지 가치 평가에 대한 중요 의제로 간주되고 있음에 따라 향후 람사르 습지도시 인증제 항목에서 생태계서비스 평가 방안 제시가 가능하다고 사료된다. 람사르 습지를 인식하여 중요한 습지의 발굴 유도에 활용이 가능하며, 도심지역 내 습지 보전의 중요성에 대한 인식 증진과 람사르 습지의 국제적 교류에 도움을 줄 수 있다고 판단된다.

• 한국습지학회지
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• 제24권2호
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• pp.123-141
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• 2022

세계적으로 자연적 습지는 천연자원 중 하나이며, 다양한 경제적 이점과 건전한 생태계를 구축한다. 본 연구는 인도에서 "Jheelon"로 알려진 람사르 습지 내 야생동물 생태계, 보존현황 등에 대한 현황에 대해 분석하였다. 2022년 현재 인도에는 약 1,09363.6 km²의 면적을 차지하는 49개의 람사르 습지가 있으며, 규모가 가장 큰 Sundarbans 습지와 규모가 작은 Chandertal 습지가 있다. 인도와 선진국에서의 인간활동에 의한 습지의 규모 감축, 기능 상실 등의 피해규모에 관한 연구는 미흡하지만 습지의 유지, 보존, 복원에 대한 중요성은 보고되고 있다. 국가 정책 및 관련 지자체들은 습지를 통한 생태계서비스 구축, 습지 보존, 복원방향, 오염물질 저감 및 배출 규제 등의 법안 마련과 습지에 대한 이해관계를 유지해야 한다.

• Ocean and Polar Research
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• 제24권1호
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• pp.93-114
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• 2002

Legal regimes of major countries actively involved in wetland programs including USA, Japan, Germany, Netherlands, and Denmark, show that these leading nations have developed their own legal regimes and policies for the conservation and restoration of wetlands since early 1990s. The main feature of their position is to preserve, create and restore wetlands, including tidal flats. However, this approach, so called 'mitigation' policy, is thus far, not a fully established policy but an evolving one. For Korea, there are only a few laws and policies which hint at the importance of creating coastal wetlands as a conservation measure, however, most of those systems only exist as vague provisions which lack any tangible and compulsory implementing procedures and technical guidelines. It seems that it is necessary to strengthen the legal measures for conserving coastal wetlands in Korea including specifying economic assessment methods and funding sources for the creation, restoration and rehabilitation of tidal flats to firmly establish a national wetland mitigation policy.

• The Korean Journal of Ecology
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• 제19권2호
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• pp.179-189
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• 1996

Growth and nitrogen retention of Persicaria thunbergii were investigated in the wetland microcosms which contained the plants growing on soil bed. Nitrogen solution was supplied to the microcosms with the same amount of $NH_4^{+}-N\; and\; NO_3^{-}-N$ at the rates of 0.00, 0.78, 1.57, 3.14g $N{\cdot}m^{-2}{\cdor}wk^{-1}$ from May 1 to August 31, 1995. The solution was detained for 5 days to react with soil and plant and then allowed to leach. The contents of NH_4^{+}-N\;and\; NO_3^{-}-N$ in the leachate, total Kjeldahl nitrogen, plant biomass, and soil characteristics were determined. Nitrogen retained by plant was estimated as the increment of TKN in plant biomass. The addition of 0.78 and 1.57g $N{\cdot}m^{-2}{\cdot}wk^{-1}$ resulted in significant increase of plant biomass. However, plant growth was inhibited when nitrogen was added at the rate of 3.14g $N{\cdot}m^{-2}{\cdot}wk^{-1}$. Overall, the plant biomass was positively correlated with the amount of nitrogen retained by plant and soil system. The amounts of $NO_3^{-}-N$ leached from the microcosms were 5~10 times higher than those of $NH_4^{+}-N$. While total nitrogen added ranged from 143.2 to 576.5g $N/m^2$, total leaching loss of inorganic nitrogen and nitrogen retained by plant was as little as 1.04~22.71g $N/m^2$, and 5.46~12.91g $N/m^2$, respectively. Then, the plant seemed to contribute to KDICical and microbial immobilization of nitrogen in the soil. Finally, it is suggested that a large portion of nitrogen added was lost into the air by denitrification and volatilizaton, and / or leached in organic forms.

• 한국지역지리학회지
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• 제17권2호
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• pp.141-149
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• 2011

사자평 고산습지는 유역분지 및 기반암의 특성과 화전의 영향을 받아 형성되었다. 사자평 유역분지는 출구가 좁고, 기반양은 많은 암설을 생산하여 사면 아래로 공급한다. 그리고 화전을 위하여 삼림을 제거함으로써 표토의 세립물질이 사전천의 하상에 퇴적되어, 시전천의 유로 주변에 고산습지가 형성되었다 사자평의 습원에는 도로를 따라 우곡이 형성되었는데, 우곡은 습원으로 공급되는 사력물질과 통류의 공급을 차단함으로써 습원을 건조화 시킨다. 이를 방지하기 위해서는 배수로의 수위를 기반암 풍화층의 높이까지 높여 습원으로 통류가흐를 수 있도록 하여야 하며, 배수로의 모양을 자연스러운 불규칙한 형태로 조정하여야 하고 시전천의 하상에 인위적인 방해물을 적치하여 시전천의 하상이 낮아지는 것을 방지하여야 한다.