• 한국물환경학회지
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• 제38권5호
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• pp.220-230
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• 2022

Seasonal variability of water quality in the upland headwater streams in ten forested catchments (37.0~209.0 ha) was examined from April to November 2021. Here, seven physicochemical parameters were analyzed including pH, electrical conductivity (EC), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen (T-N), total phosphorous (T-P), and BOD/TOC. The parameters were compared with those of lowerland rivers as middle and lower reaches within a watershed. The pH showed was low (6.4~6.9) during all the seasons, however, BOD and BOD/TOC in the fall season were 2-fold higher than in the spring and summer seasons. Based on environmental standards, the water quality level revealed that the upland headwater streams maintained the purity and cleanliness of water except for pH in the summer season. BOD/TOC of all the seasons and BOD of the fall season in the upland headwater streams were higher than that in the lowerland rivers, whereas the rest of the physicochemical parameters in the upland headwater streams were lower than that in the lowerland rivers. Additionally, the water quality level maintained the purity and cleanliness of water as "Good" in two reaches. The unique aspects of our study design enabled us to draw inferences about water quality characteristics with temporal and spatial analysis in upland headwater streams. This design will be useful for the long-term strategy of effective water quality management for integrated upland headwater streams and lowerland rivers within a watershed.

• 한국환경복원기술학회지
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• 제5권6호
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• pp.14-23
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• 2002

Daejeon is a large city in Korea and very high-speedly developing city. Recently urban area is expanding and large forest patch is fragmenting into small habitats because of urban sprawl. The fragmentation of large forest patch decreases the size of habitats and increases the loss of biodiversity in urban area. This study is to analysis the connectivity of green space of Daejeon metropolitan city, and suggest the optimum location of greening site and corridor in order to increase the connectivity of green space of Daejeon metropolitan city. The findings of this study are as follows; (1) The result of this study showed that ${\alpha}$ and ${\gamma}$ index are -0.24 and 0.20. A ${\alpha}$ index is very low and a ${\gamma}$ index is relatively low. (2) The dispersion was very high, for urban forest patches were isolated through fragmentation. Therefore, it needed ecological corridors in order to connect the patches. (3) A urban streams were very important in connectivity of urban green space. Urban riparian corridor must be preserved and restored. (4) A urban green space policy and planning must be prepared to increase the connectivity and assessment of alternatives must be accomplished from perspective of connectivity. The results of this study show the practical implications in perspective of green space planning and policy in Daejeon metropolitan city. The suggestions by findings of this study are to connect green space between large forest patch in urban fringe and island green space in inner city. Also, It is required that urban stream is restored to natural feature for use of corridor by wildlife.

• Journal of Forest and Environmental Science
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• 제33권2호
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• pp.79-90
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• 2017

Improving the urban environmental quality relies mainly on the increasing of urban forests capacity to store carbon dioxide. This study assesses the floristic diversity of urban institutional lands in Bukavu and their potential to reduce atmospheric $CO_2$. An exhaustive inventory over three sites ($Coll{\grave{e}}ge$ Alfajiri, $Cath{\acute{e}}drale$ Notre-Dame de la Paix and Institut $Sup{\acute{e}}rieur$ $P{\acute{e}}dagogique$) of Bukavu led to the identification of 1,113 trees of which the diameter at breast height (1.30 m) ranged from 4.9 to 161 cm. Results reveal a floristic diversity made up of 4 families of conifers with 4 species and 14 of broadleaves with 21 species. Average densities were of $54trees\;ha^{-1}$ and $5.21m^2\;ha^{-1}$ of basal area. Urban-based allometric equations used yielded up to 312.8 tons of carbon stored in trees aboveground biomass equivalent to 1,147.9 tons of $CO_2$ reduced from the atmosphere over the three sites. The rate of carbon storage reaches $15.1tons\;ha^{-1}$. Thus, trees of the three institutional sites in Bukavu play an important role in reducing atmospheric $CO_2$ and contribute, thereby, to mitigate global climate change effects. Given the current environmental challenge associated with high population growth rate in cities, the urban forest ecosystem in DRC requires to be extended and further investigation.

• 한국산림과학회지
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• 제107권1호
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• pp.59-70
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• 2018

본 연구는 도시생활권의 특성을 고려한 재해예방용 사방댐을 개발하고, 현장에서의 활용성을 검토하기 위하여 안정성 및 기능성을 평가하는 것을 목적으로 하고 있다. 필러와 바닥스크린을 활용한 토석류 방재댐과 수제를 활용한 토석류 제어댐 등 복합형 사방댐 2종을 개발하였고, 각 구조물의 정적(활동, 전도, 지지) 및 동적(부재력) 안정성을 검토하였다. 그 결과, 각 검토항목별로 충격력에 대한 안정성에 미달하는 경우도 일부 나타났으나, 대부분 항목에서 기준 안전율을 만족하는 것으로 나타났다. 또한, 개발된 사방댐을 토대로 축소모형을 제작하여 수로실험을 실시한 결과, 사방댐을 설치하지 않은 대조구에 비교하여 유하물의 퇴적범위와 퇴적속도를 감소시켰고, 포착율은 평균적으로 3.5배 증가하는 것으로 나타났다. 추후 수행될 다양한 조건에서의 수로실험 결과를 바탕으로 개발된 도시생활권형 사방댐의 기능을 보다 정량적으로 구체화 할 수 있다면, 이를 도시생활권에 활용하여 산지토사재해 피해를 효과적으로 저감할 수 있을 것으로 기대되었다.

• The Korean Journal of Ecology
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• 제23권5호
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• pp.369-375
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• 2000

도시에서 토양을 보존하고 합리적으로 이용하기 위하여 도시 토양을 과학적으로 이해하는 것이 필요하지만 아직까지 이처럼 과도하게 관리되고 교란된 토양의 특성에 대하여 집중적으로 연구되지 않았다. 본 연구에서 조사된 인천의 산림, 잔디밭, 가로수, 나지 및 포장 밑 토양에서 답압에 의한 견밀화에 의하여 토양 가밀도가 높았다. 또한 다양한 도시 토양에서 수분함량은 전원지 산림 토양에 비하여 적었고 지온은 높았다. 화학적으로는 도시 토양에서 pH가 중성에 가깝고 유기물 함량이 적었다. 도시 토양의 총세균수는 전원지 산림 토양의 단지 5∼50% 수준이었다. 단계식 다중회귀분석의 결과, 토양 유기물함량이 총세균수에 영향을 미치는 주요한 요인으로서 선정되었다. 대부분의 도시 토양에서 탈수소효소 활성도는 전원지 산림 토양과 유의한 차이가 없었으나, 아스팔트 포장 밑 토양에서는 낮았다 그러므로 견밀한 도시 토양에서 낮은 유기물함량이 물질 순환에 관여하는 미생물 수에 악영향을 미친다고 판단되었다.

• 대한공간정보학회지
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• 제21권4호
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• pp.21-27
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• 2013

최근 탄소 흡수원으로 산림자원의 체계적인 관리의 중요성이 높아지고 있다. 특히 도심지역에서의 산림자원은 탄소 흡수원 뿐만 아니라 도시자연의 환경개선 기능은 물론 사회적 정서적 측면에서도 중요한 역할을 한다. 따라서 본 연구에서는 고해상도 항공영상과 KOMPSAT-2 위성영상의 이용하여 도심지역내 산림 영역의 수종 분류를 수행하기 위하여 고해상도의 항공영상과 위성영상의 NIR밴드의 영상재배열을 수행하였으며 NDVI 등 9개의 다양한 식생지수를 분산분석을 통해 임상단위로 수종을 구분하였다. 또한 산림청에서 제공하는 임상도를 이용하여 본 연구에서 구분된 수종과 비교 분석을 수행하였다. 이와 같은 식생분류 결과를 바탕으로 도시지역 내 식생관리를 위한 기초자료를 구축하고자 하였다.

• 한국환경복원기술학회지
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• 제14권2호
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• pp.11-20
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• 2011

This study was conducted to suggest appropriate methods for management of urban forest after investigating the present condition and problems of urban forests by analyzing vegetation and soil properties in urban forests in the Daejeon. On the basis of our research, Pinus rigida dominate Gyejoksan and Bomunsan. Pinus densiflora dominate Wolpyeong park and Quercus acutissima dominate Namsun park. On the basis of our result of analysis of soil chemical properties, all investigated areas have low pHs, available phosphates and exchangeable cations. They indicate that the soil of those areas have been acidifying progressively. Soil hardness measurements were conducted to know the conditions of trampled soils and the results of them show that soil hardness in Namsun park was higher than the others. This indicates that human interference affect the health of the urban forest.

• 농촌계획
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• 제13권1호
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• pp.97-109
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• 2007

The purpose of this research was to investigate and analyse how Community Forest Initiatives as urban fringe management initiatives made alliances with a variety of interest groups, enrol them in the urban fringe management processes using the Actor Network Theory. The Thames Chase Community Forest Initiative was selected and its area of operation included a $97 km^2$ area of green-belt area in East London. It was a instrument far improving and protecting the unique characteristics of the countryside landscape from urban developments as well as evaluating the impact of forestry inclusion in land use planning in the urban fringe. It was operated through a tiered structure comprising the Thames Chase Joint Committee and the management team. They employed a variety of devices to speak with one voice to bring about an effective operation process and to secure the enrolment of a variety of interest groups in its operational processes. Of note, the initiative's actor network impacted on improvement to and management of the countryside landscape despite not owning any land itself. As a result, when urban fringe management initiatives will be launched in South Korea to achieve a more effective and efficient urban fringe management, local councillors and representatives from public and non-government bodies should be more responsive to local communities' views and needs and work more vigorously on their behalf through lobbying, seeking media support, and so on. Moreover, better understanding and communication between local authorities' officers and management initiatives' teams are essential to avoid duplication of work practice.

• 한국조경학회:학술대회논문집
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• 한국조경학회 2007년도 Journal of Landscape Architecture in Asia Vol.3
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• pp.19-29
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• 2007

The making of mountains and waters are recognized as essential to traditional Chinese landscapes and it is this concept that guided the Beijing Olympic Landscape, "Axis to Nature". The Olympic landscape extends the central axis of Beijing north until it is punctuated by the Forest Park Hill and dissipated by Forest Park Lake. Traditional landscape gardens, paintings, and poetry were researched and the plan assessed by eminent scholars and experts to conceive and construct an ecological park that features unique design and traditional Chinese landscape art.

• The Journal of Asian Finance, Economics and Business
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• 제8권8호
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• pp.465-473
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• 2021

This study is the application of a choice experiment to assess Mekong Delta urban households' preferences and motivations for ecosystem conservation in the U Minh forest. The study applied a choice modeling approach to estimate the economic values of the proposed ecosystem conservation program in the U Minh forest by accessing urban consumer preferences and their willingness to pay for the project. Discrete choice experimental data was collected from 450 residents in the cities of the Vietnamese Mekong Delta. The multinomial logit model was employed to identify consumer's stated preferences for the environmental and sustainability attributes of the conservation project. The results showed that Mekong Delta urban residents paid much attention to the proposed project to protect and develop the U Minh forest. In addition, the results showed that higher education, income, and knowledge of the U Minh forest revealed a higher likelihood of selecting the project, while the older residents would select the status quo more than the younger ones. The study also proved that the effect of participation had a strong impact on the willingness to pay for the project. The findings could be useful for policymakers to take action to raise resident's awareness and willingness to pay for the U Minh forest project.