http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 신재기 ( Sin Jae Gi ) (검색결과 10 건)
- 무료
- 기관 내 무료
- 유료
-
신재기,Sin,Jae-Gi 한국조류학회(藻類) 2003 ALGAE Vol.18 No.2
Seasonal investigations were conducted to determine the major aquatic environmental factors and the variation of phytoplankton in Pyeongtaek Reservoir in March, June, September, and December 2000. Heavy rainfall mainly occurs from late June to mid-September, and water quality of reservoir was high in the influent zone of stream and riverine zone of reservoir. The biomass of phytoplankton was related to aquatic environmental factors. In particular, its value increased where nutrient concentration was high. Likewise, the increase of turbidity was found to have anthropogenic effects on the varying quantity of phytoplankton. The phytoplankton composition in quantitative survey identified into 43 genera and 71 species. Species numbers of Bacillariophyceae, Cyanophyceae, and Chlorophyceae accounted for 17%, 15%, and 49%, respectively, with the remainder constituting less than 3-7%. The distribution of such phyla also significantly varied according to seasons, accounting for 25%, 37%, 61%, and 14% in March, June, September, and December, respectively. Bacillariophyceae and Chlorophyceae were observed throughout the year, while Cyanophyceae proliferated in June and September. Euglenophyceae and Dinophyceae were prevalent in March and September, while Cryptophyceae occurred in March and December. The succession trend of phytoplankton showed the maximum cell density was followed by Bacillariophyceae (6.8$\times$$10^3$ cells ${\cdot}$ml)$\rightarrow$ Chlorophyceae (3.7$\times$$10^3$ cells ${\cdot}$ml)$\rightarrow$Cyanophyceae (1.3$\times$$10^4$ cells ${\cdot}$ml)$\rightarrow$Cryptophyceae (1.2$\times$$10^3$ cells ${\cdot}$ml). The cell density was the highest in the upstream. Dominant species were composed of Aulacoseira ambigua, Stephanodiscus hantzschii f. tenuis of Bacillariophyceae, Anabaena spiroides var. crassa, Microcystis aeruginosa, Oscillatoria amphibia of Cyanophyceae, Actinastrum hantzschii var. fluviatile, Pediastrum duplex var. reticulatum of Chlorophyceae, Euglena gracilis, Trachelomonas spp. of Euglenophyceae, and Chroomonas spp., Cryptomonas spp. of Cryptophyceae. As a results, seasonal variation of phytoplankton in Pyeongtaek Reservoir was evident in spite of inflow the high concentration of nutrients from watershed streams, because hydrological control and anthropogenic disturbance in reservoir were found to have major effects on the retention time of water.
-
옥천천 유역의 하천과 만곡부에서 조류 생장 잠재력 측정
신재기,김동섭,이혜근,맹승진,황순진,Sin,Jae-Gi,Kim,Dong-Seop,Lee,Hye-Geun,Maeng,Seung-Jin,Hwang,Sun-Jin 한국조류학회(藻類) 2003 ALGAE Vol.18 No.2
Algal growth potential test (AGPT) bioassay were conducted to evaluate the stream and reservoir water in the Okchon Stream Watershed during May to September 2002. The water quality of the stream water was clean in the upstream, deteriorating toward the downstream. In particular, SRP and $NH_4$ significantly increased due to treated wastewater. The average AGPT value of the Okchon Stream watershed was 22.4 mg dw ${\cdot}l^{-1}$, with the range of 0- 195.7 mg dw ${\cdot}l^{-1}$. AGPT value was the highest immediately after inflow of treated wastewater, averaging 91.3 mg dw${\cdot}l^{-1}$. AGPT was highly correlated with SRP, $NH_4$ and TIN factors, with P having the greatest effect on the growth of algae. Among N components, $NH_4$ was preferred to $NO_3$ for the growth of algae. Likewise, AGPT was closely linked to meteological and hydrological effects and development of natural phytoplankton. In survey stations, mesotrophic, eutrophic and hypertrophic conditions accounted for 43%, 21% and 36%, respectively. On the other hand, hypertrophic condition focused on the downstream reaches. AGPT was useful in determining not only the limiting nutrients but also the water fertility for the growth of algae. Based on the AGPT results, the management of point sources for water pollution in treated wastewater was important in the protection of aquatic environment in the stream and embayment.
-
신재기 ( Sin Jae Gi ),황순진 ( Hwang Sun Jin ),김동섭 ( Kim Dong Seob ),강창근 ( Kang Chang Geun ) 한국하천호수학회 2003 생태와 환경 Vol.36 No.3
The fertility of stream water in major streams of the Lake Shihwa Watershed was compared using water analyses and algal growth potential test (AGPT) in typical drought seasons from December 2001 to April 2002. The water quality varied considerably depending on streams. These streams were very rich in inorganic nutrients that the nutrient levels and characteristics of each stream could be easily determined. Through AGPT, 63.6% of growth was observed in the average values of each stream, with non-growth accounting for 36.4%. AGPT results showed that 40.9% of the 22 stations were in hypertrophic condition and 54.5% in eutrophic condition. AGPT values were significantly correlated with TIN, NH₄, and SRP (P<0.001); compared to other nutrients, however, they were more related to SRP and NH4. Moreover, the values increased with high concentration of N and P and low N/P ratios. Nonetheless, the values were more dependent on P concentration than N concentration. This suggests that the effect P on the water quality of lake situated in downstream may serve as a potential indicator of phytoplankton development. Depending on the drainage pattern of streams, the wastewaters of wastewater treatment plant (WwTP) and untreated wastewater (UTW) were found to have 53.4% and 46.6%, respectively, of TIN, 51.9% and 48.1% of NH₄, 62.8% and 37.1% of NO₃, 62.6% and 37.4% of SRP, and 44.1% and 55.9% of SRSi. The AGPT value was 51.1% in WwTP wastewater and 48.9% in UTW wastewater, the concentration of WwTP wastewater was slightly higher. For untreated wastewaters flowing into the constructed wetland and into the lake, TIN accounts for 43.0% and 57.0%, respectively, of nitrogen components, NH₄ 44.4% and 55.6%, NO₃ 39.6% and 60.4%, SRP 53.5% and 46.5%, and SRSi 52.3% and 47.7%, respectively. The AGPT value was 58.0% in the constructed wetland and 42.0% in Lake Shihwa; the concentration in streams flowing into the wetland was slightly higher. Therefore, persistent and large development of phytoplankton in Lake Shihwa cannot be prevented unless a measure to hytoplankton control is implemented. This is because the concentration of nutrients in specific streams flowing into the lake is very high, even though the inflow of water is low.
-
하천형 저수지 팔당호의 육수학적 특성: 수문과 수환경 요인
신재기 ( Sin Jae Gi ),황순진 ( Hwang Sun Jin ),강창근 ( Kang Chang Geun ),김호섭 ( Kim Ho Seob ) 한국하천호수학회 2003 생태와 환경 Vol.36 No.3
This study aimed to determine the relationship between rainfall-discharge patterns and major aquatic environmental factors in a river-type reservoir. Specifically, daily monitoring was conducted in Paltang Reservoir from January 1999 to December 2001. Observation of the daily changes of the environment factors showed that natural meteorological factors and hydrological factors causing the change of water discharge had a major effect on the aquatic environment. Rainfall was the main source of hydrological changes, with its frequency a possible direct variable governing the range of discharge changes. Rainfall was weak in November~ May and heavy in June~October (heavist in summer). The range of water discharge was greatest during summer(July to September) and lowest during winter(january to February). A principal component analysis (PCA) showed that aquatic environmental factors could be classified into three different types in the pattern of annual variation. First, type I included water temperature, turbidity, water color and organic matter(COD), which increased with increasing water discharge. Second, type Ⅱ consisted of DO and pH, which decreased with increasing water discharge. Third type Ⅲ included conductivity, alkalinity and chloride ion, which showed middle values with increasing water discharge, Monthly variation of aquatic environments explained by the first two dimensions of PCA suggests that aquatic environments explained by the first two dimensions of the PCA suggests that aquatic environments of Paltang Reservoir may have annual cycle typical of river-type reservoirs depending on hydrological factor such as water discharge.
-
신재기 ( Sin Jae Gi ),강창근 ( Kang Chang Geun ),황순진 ( Hwang Sun Jin ) 한국하천호수학회 2003 생태와 환경 Vol.36 No.3
Daily monitoring was conducted to elucidate the changes in turbidity and distribution of particles in the turbid water of a river-type reservoir (Paltang Reservoir) from 1999 to 2001. Water turbidity and the particle distribution of turbid water were principally affected by meteorological factors particularly rainfall patterns and hydrological factors such as inflow and outflow. The mean concentration of turbidity was constant each year, with the concentration of less than 10NTU accounting for 85%. Seasonal characteristics were remarkable, with winter and spring having <5 NTU, autumn 5~10 NTU, and summer >20NTU. Unlike hydrological changes, maximum turbidity was observed from late July to early August and continuously increased from 1999 to 2001. In particular, the maximum turbidity of reservoirs remarkably increased toward the lower part of reservoir in 2001. Discharge and turbidity increased or decreased slowly in 1999; in contrast, turbidity rapidly increased in the early rainfall period of 2000 and 2001 but later decreased as discharge increased. In the particles of turbid water, clay ingredients were more densely distributed and more dominant in all stations. Of the total particles in turbid water, clay constituted 63.9%~66.6% and silt 33.4~36.1% to account for a combined total of 98.1~100%. Sand made up less than 1.1%. The turbidity of river-type reservoir was also found to be mainly affected by the biomass of plankton in a non-rainfall period. During a rainfall period, however, the quantity and relative ratio of inorganic particles depending on the soil components affected turbidity.
-
-
김미경,신재기,차재훈,Kim, Mi-Gyeong,Sin, Jae-Gi,Cha, Jae-Hun 한국조류학회(藻類) 2004 ALGAE Vol.19 No.1
This study was to clarify the variations in a marine ecosystem through examining the species composition of benthic algae in the coast of Dokdo Island during summer (June & August, 2003). The total number of species found in benthic algae was 45 composed of 11% green algae, 29% red algae and 60% brown algae. The dominant species were Enteromorpha linza, Cladophora spp. and Codium frgile for green algae, Ecklonia cave, Eisenia bicyclis, Sargassum confusum, S. patens, S. horneri, Myagropsis myagroides for brown algae and Amphiroa cphedrace. A pusilla, Lithophyllum okamurae, Corallina spp. Laurencia pinnata, L. hamata, Chondria crassicaulit, C. dasyphylla, Gelidium amansii, Neosiphonia yendoi and Polysiphonia yendoi for red algae. The number of benthic algal species decreased more in this study than in previous researches. The whitening of the rocky shore might provoke the decrease of benthic algal biomass and species.
-
이혜근,김대홍,신재기,양재린,Lee, Hye-Geun,Kim, Dae-Hong,Sin, Jae-Gi,Yang, Jae-Rin 한국수자원학회 2000 한국수자원학회논문집 Vol.33 No.1
본 연구에서는 금강유역전반에 걸친 수문 및 수질 현황을 조사 파악하였다. 또한 8회에 걸친 수질조사를 통하여 대청댐하류의 수질을 분석하였으며, 조사·분석된 자료를 바탕으로 일반수질항목에 대하여 기존의 수리·수질 모형을 개선하여 수질모의를 수행하였다. 또한 유해물질 유출사고시 조정지 댐에서의 적절한 방류시기를 결정하기 위한 주요지점에서의 도달시간을 산정하였다.
-
-
코리아스칼라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
