• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2016년도 학술발표회
• /
• pp.194-194
• /
• 2016

Gansu, located in the northwestern region, is a typical agricultural province of arid, semiarid in China. The shortage of water resources is the biggest obstacle of Gansu Province's development, and the dry farming water-saving is the eternal theme of Gansu agricultural sustainable development. In recent years, intensify reform in Gansu, has walked out a successful way in the agricultural water-saving. Using the integrated river basin governance as opportunity, the total water-using quantity was regarded as rigidity to retrain, distributed to counties (districts), irrigated areas, towns, associations, groups step by step. Agricultural water price was substantially increased, with the surface water price from about $0.1RMB/m^3$ to more than $0.2 RMB/m^3$, and the ground water from zero to more than $0.1RMB/m^3$. Simultaneously, the difference water prices and over-quota water progression price markup were carried out. The transaction of water rights was encouraged to impel the peasant to establish the consciousness of saving-water. The regulatory documents were formulated to standardize the scope, condition, mode, program etc. of agriculture water-rights transaction, to guarantees the transaction of water rights is carries out in order. The pattern of farming was optimized and adjusted, reducing the high water-consumption crop, increasing economic crops with high benefit and low water-consumption, developing industrialized agricultures such as green house. The relative engineering and measuring facility were comprehensively improved, with the anti-seepage of canal system and the enforcement of dynamo-electric well, developing high-efficient water-saving irrigation and overall metering facilities. The water fine-grained management has realized, and obvious water-saving effect has obtained: water-using rate in the irrigation area by river water has brought up to 0.57 from 0.52, and by well water up to 0.84 from 0.76. Although the water price has increased, the proportion that the water rate expenditure accounted for the cost lasts decline, and the farmers' income has gone up. The peasants express, the used water is few, and it is few to till land, but the income is many, and life is better.

• 한국환경과학회지
• /
• 제32권5호
• /
• pp.315-328
• /
• 2023

Cyanobacteria have been used as pollution indicator species in freshwater ecosystems, and identifying their fluctuations can be an important part about management of surface waters globally. Cyanotoxins produced by cyanobacteria are directly or indirectly a threat to human and environmental health. In order to confirm the potential risk of these cyanotoxins, the fluctuations of phytoplankton and phylogenetic analysis of cyanotoxin synthetase genes were conducted at each point in the Yeongsan River water system in Gwangju from November 2021 to October 2022. Diatoms which grow well in winter were dominant at 99.4 ~ 99.5%, and diatoms and green algae were dominant from the spring to autumn when the water temperature rises. Stephanodiscus spp. were dominant at 92.7 to 97.5 % at all sites in the winter, and Aulacoseira spp., which grow in warm water temperatures, were dominant in summer and autumn. Microcystis aeruginosa was dominant at 25.2% in summer only at site 5. mcyB and anaC have been detected as cyanotoxin synthetase genes. The phylogenetic tree of anaC could be divided into two groups (Group 1 & Group 2). Group 1 contained Aphanizomenon sp. and Cuspidothrix issatschenkoi. It is combined with Aphanizomenon sp. and Cuspidothrix issatschenkoi, which are known to produce cyanotoxins.

• Bulletin of the Korean Chemical Society
• /
• 제34권9호
• /
• pp.2577-2582
• /
• 2013

A novel stick-shaped portable sensing device featuring a microhole array interface between the polyvinylchloride-2-nitrophenyloctylether (PVC-NPOE) gel and water phase was developed for in-situ sensing of perchlorate ions in real water samples. Perchlorate sensitive sensing responses were obtained based on measuring the current changes with respect to the assisted transfer reaction of perchlorate ions by a perchlorate selective ligand namely, bis(dibenzoylmethanato)Ni(II) (Ni(DBM)2) across the polarized microhole array interface. Cyclic voltammetry was used to characterize the assisted transfer reaction of perchlorate ions by the $Ni(DBM)_2$ ligand when using the portable sensing device. The current response for the transfer of perchlorate anions by $Ni(DBM)_2$ across the micro-water/gel interface linearly increased as a function of the perchlorate ion concentration. The technique of differential pulse stripping voltammetry was also utilized to improve the sensitivity of the perchlorate anion detection down to 10 ppb. This was acquired by preconcentrating perchlorate anions in the gel layer by means of holding the ion transfer potential at 0 mV (vs. Ag/AgCl) for 30 s followed by stripping the complexed perchlorate ion with the ligand. The effect of various potential interfering anions on the perchlorate sensor was also investigated and showed an excellent selectivity over $Br^-$, $NO_2{^-}$, $NO_3{^-}$, $CO{_3}^{2^-}$, $CH_3COO^-$ and $SO{_4}^{2^-}$ ions. As a final demonstration, some regional water samples from the Sincheon river in Daegu city were analyzed and the data was verified with that of ion chromatography (IC) analysis from one of the Korean-certified water quality evaluation centers.

• 한국조경학회지
• /
• 제30권1호
• /
• pp.52-60
• /
• 2002

This paper presents a streetscape design for "Dangiae-Gil"which is located at 126-1 Yangpyung-2dong, Yeongdeungpo-gu, Seoul and is about 500m in length and about 24m in width. The design goals are to make a green street on which people want to walk and people can walk and rest safely and pleasantly. To achieve these goals, concepts of environmentally-friendliness, placeness, safety, amenity, vitality, connectivity, and democracy are developed. For pedestrian safety, shared street concepts, such as crank, slalom etc. are adopted. The site is divided into 5 thematic spaces, such as "Village Entrance Space", "Culture Street", "Dangsan Park", "Nature Street", and "Ferry Space". The Village Entrance Space, which is an entrance of the Dangjae-Gil and a welcoming space, is for communicating information about the area. "Dangnamu"(zelkova tree) and signs are introduced here. The Culture Street is for experiencing past and present culture of the area. Colored tiles and plant boxes attached to benches are introduced. The Dangsan park is a sacred space where modem people can feel the sacredness of nature arid of being in a refuge. Dangjib, Dangnamu, multi-purpose plaza, athletic facilities, and playground for infants are introduced. The Nature Street is a space for feeling and teaming nature which has disappeared from the area leading to the river and a space for community participation. The elementary school walls were demolished and nature education spaces, such as butterfly and dragonfly garden, ecological pond, wildflower garden, etc., which are related to school education, are introduced. The Ferry Space is a space symbolizing a old ferry crossing and an entrance plaza to a bridge for "Sunyu-do\" . A boat-shaped deck, an elevator for handicap people, and parking space are introduced. In conclusion, sustainable management schemes for the site are suggested.sted.

• ALGAE
• /
• 제20권4호
• /
• pp.333-343
• /
• 2005

Spatial and temporal variations of environmental factors and phytoplankton community were investigated in the three stations of Andong Reservoir in 1997 and 2003. The changes of physico-chemical water quality and phytoplanktonic biomass were higher in 2003 than that of 1997, due to rainfall difference. The concentration of total nitrogen (TN) and total phosphorus (TP) in the reservoir decreased, but total nitrogen fell relatively more between them. TN/TP ratio decreased from 109 to 90 showing no change at the downstream but a big decrease at the midand upstream. Predominant phylum of phytoplankton in Andong Reservoir were six genus that composed to Anabaena, Aphanizomenon and Microcystis of Cyanophyceae, Cosmarium and Scenedesmus of Chlorophyceae and Synedra of Bacillariophyceae, respectively. Among the observed phytoplankton, diatom Synedra occured as the maximum amount of 3,400 cells mL$^{-1}$ even at the above 30°C. Green algae Scenedesmus observed along with Microcystis. It seemed to be compete with Microcystis during the high water temperature period. Although trophic state of Andong Reservoir was decreased, the standing crops of phytoplankton were increased. Moreover bluegreen algae, Aphanizomenon and Microcystis in the region of upstream to midstream and diatom, Synedra in the region of midstream to downstream were increased until to reach the algal bloom, respectively. It seemed necessary to attention the changes of blue-green algae Aphanizomenon, that has an ability of nitrogen fixation.

• 한국지역지리학회지
• /
• 제12권6호
• /
• pp.720-732
• /
• 2006

이 연구는 세계와 한국의 포도 생산 및 와인 산업을 살펴본 후, 강원도 영월 지역을 대상으로 하여 와인테마마을조성의 가능성을 알아보고자 한다. 한국은 1988년 수입와인시장이 형성되고 2011년 후에는 국산와인의 시장점유율이 소멸하는 것으로 전망된다. 한국의 와인시장이 외국산 와인의 수입국으로 전락하지 않고 와인 시장이 균형적으로 발전하기 위해서는 수입와인과 경쟁할 수 있는 전략이 요구된다. 이러한 전략의 하나가 그린튜어리즘인 와인 테마마을의 조성이다. 강원도 영월군 거운리 일대는 동강 지류를 따라 펜션과 래프팅 사업체가 집중하고 있어 관광객의 왕래가 빈번하다. 이들이 거운리 일대에 생산된 포도 품종으로 와인을 생산하여 음용하는 와인테마마을 성공가능성은 포도의 계절별 특수성을 고려한 다양한 체험 프로그램에 달여 있다. 포도의 출하 시기인 8월 하순$\sim$9월 하순에는 포도 따기를 비롯한 와인담기 체험프로그램을 운영하고, 포도 관련 직접체험을 할 수 없는 시기에는 영월 지역의 상징인 천문대와 동강의 이미지를 접목시킨 '와인과 시낭송', '와인과 별과 음악회', '영월 와인 영화제', '와인 박물관' 등 도시민들에게 언급될 수 있는 문화적 차원에서의 와인프로그램을 운영하도록 한다. 또한 생식용 캠벨 이외에 머루, 복분자 등 재배작물을 다원화하고 이들 품종으로 만든 와인으로 프랑스 등의 와인 맛에 길들여진 소비자의 입맛을 바꾸게 되면 4계절 와인테마마을의 조성이 가하다고 본다. 한국의 포도주산지인 충청북도 영동군과 경상북도 김천시도 연중 방문객을 모을 수 있는 프로그램을 운영하여 테마마을 조성이 성공을 거두게 되면 이들은 영월군과 함께 한국의 와인산업을 이끌어 갈 수 있게 된다.

• 한국수산과학회지
• /
• 제4권2호
• /
• pp.61-65
• /
• 1971

장항만 연안에 서식하는 굴과 대천지방에 서식하는 굴의 연체부의 동함량에 관하여 1970년 10월 부터 1971년 2월까지 4개월에 걸쳐 채집 분석했다. 이 양군간에 굴 연체부의 동함량에는 현저한 유의차가 인정되였다. 장항만 연안에 서식하는 굴은 장항제연소에서 흘러나오는 폐수와 광재에서 용출하는 동에 의하여 주로 오염되었다고 볼 수 있다. 장항만 연안에 서식하는 굴은 동함량이 $434.4{\pm}141.9mg$ Cu/kg wet base였으며, 대천지방에 서식하는 비오염된 굴은 평균 $19.0{\pm}4.9mg/kg$ wet base의 수치를 나타냈다. 끝으로, 본 실험을 도와준 최병선군과 전의식군에게 사의를 표하는 바이다.

• 한국물환경학회지
• /
• 제32권5호
• /
• pp.433-441
• /
• 2016

Many large dams have been constructed for water supply, irrigation, flood control and hydropower in Korea for the last century. Meanwhile, recent studies indicated that the artificial reservoirs impounded by these dams are major sources of carbon dioxide (CO₂) to the atmosphere and relevant to global budget of green house gases. However, limited information is available on the seasonal variations of CO₂ evasion from the reservoirs located in the temperate monsoon regions including Korea. The objectives of this study were to estimate daily Net Atmospheric Flux (NAF) of CO₂ in Daecheong Reservoir located in Geum River basin of Korea, and analyze the influencing parameters that characterize the variation of NAF. Daily pH and alkalinity (Alk) data collected in wet year (2012) and dry year (2013) were used for estimating the NAFs in the reservoir. The dissolved inorganic carbon (DIC) was computed using the pH and Alk measurements supposing an equilibrium state among the carbonate species. The results showed seasonal variations of NAF; negative NAFs from May to October when the primary production of the reservoir increased with water temperature increase, while positive NAF for the rest of the period. Overall the reservoir acted as sources of CO₂ to the atmosphere. The estimated NAFs were 2,590 and 771 mg CO₂ m^-2d^-1 in 2012 and 2013, respectively, indicating that the NAFs vary a large extent for different hydrological years. Statistical analysis indicated that the NAFs are negatively correlated to pH, water temperature, and Chl-a concentration of the reservoir.

• 한국지리정보학회지
• /
• 제15권1호
• /
• pp.133-143
• /
• 2012

본 연구는 창원시 도시지역을 대상으로 도시공간을 고려한 야간시간대의 도시열섬특성을 파악하기 위해 1:1,000 축척의 토지이용도 및 토지피복도와 DTM, 그리고 ASTER 위성영상에서 추출된 야간시간대의 지표온도자료를 활용하였다. 분석결과에 따르면, 야간시간대는 건물이 밀집되어있는 단독주거지역이 상업지역이나 공공시설지역보다 열섬강도가 높았고, 이것은 에너지소비에 의한 인공열 방출이 열섬형성에 많은 영향을 미치기 때문으로 판단된다. 또한 이러한 점 때문에 공업지역에서는 건물은 가동시간에 따라 온도차이가 매우 크게 나타났다. 한편, 도시녹지지역과 하천지역은 도시열섬을 완화하는 냉각효과가 있는 것으로 확인되었으며, 열섬강도가 높은 지역에 녹지 및 수변공간의 조성으로 열섬강도를 낮출 필요가 있을 것으로 판단된다. 이상과 같은 결과는 야간시간대의 도시열섬을 완화하는데 있어 개발계획 수립시 효율적인 공간활용을 위해 기초자료로 이용될 것으로 사료된다.

• Ecology and Resilient Infrastructure
• /
• 제6권1호
• /
• pp.69-76
• /
• 2019

생태계는 우리의 생존과 삶의 질을 유지할 수 있게 하여 인간 복지에 직, 간접적으로 기여하고 있다. 그래서 생태적 기능의 계량화 방법이 필요하다. 본 연구에서는 응용생태공학에 생태계서비스를 도입하고 적용하는 것에 대하여 논의하였다. 하천의 경제적 가치, 도시 블루-그린-화이트 네트워크 구축, 생태복원 및 통합 물관리에 생태계서비스 개념 및 평가체계를 적용할 수 있는 방안을 모색하였다. 생태계서비스 개념 틀과 평가는 이해해당사자의 생태계 혜택 이해에 도움을 주고 응용생태공학 적용을 증가시켜 생태적 보호와 복원 가치의 증진에 이용될 수 있다.