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동복천수계에 서식하는 수서곤충의 (水棲昆蟲) 군집에 (群集) 관한 연구
조영관,백순기,김종선,나철호 ( Young Gwan Cho,Soon Ki Baik,Jong Sun Kim,Chul Ho Ra ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.4
The total taxi of aquatic insects in the Tongbok stream were 78 species, 54 genera, 29 families in 8 orders. Among them, major groups were mayflies(24 species) and caddiesflies(17 species). The seasonal species number of collected specimen were similar, that is, they occurred 44 species in winter, 45 species in spring and summer respectively, and 39 species in autumn. In proportion of individuals at this surveyed stream, caddisflies were the highest(42%) and mayflies were 30%. Mostly dominant species were belonged to caddisflies and mayflies. Above all, Hydropsyche KUb and serratella rufa were dominant species. Dominant indices ranged from 0.25∼0.88. Species diversity indices showed 1.14∼4.29.
저서동물을 (底棲動物) 이용한 증암천 (甑岩川) 상류 하천의 생물학적 수질평가
조영관,박병훈,백순기,김종선,나철호 ( Young Gwan Cho,Byoung Hoon Park,Soon Ki Baik,Jong Sun Kim,Chul Ho Ra ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3
The taxa of benthic macroinvertebrates in the upper region of the Cheungam stream was composed of 76 species, 61 genus, 41 families, 13 orders, 4 classes in 3 phyla. Among them, aquatic inserts containing 71 species (93%) were the major group. According to order, Ephemeroptera containing 26 species was abundant, and Trichoptera containing 19 species, Plecoptera 13 species an? Diptera 11 species were the major taxa. The seasonal species number of collected specimens was most numerous in spring (57 species) and similar in other seasons (41∼44 species). On the one-to-one propotion, Ephemeroptera were the highest (52%), and Trichoptera was 19%, Diptera 16%, Plecoptera 9%. DOminant Species were Epeorus, Cincticostella castanea, Serratella rufa and Hydropsyche belonging to Ephemeroptera and Trichoptera. Dominant indices ranged from 0.34∼1.00. Species diversity indices showed 0.00∼3.82. According to saprobic system based on the species diversity indices, water quality was evaluated to be oligosaprobic and β-mesosaprobics. The biological water quality as in biotic and pollution indices was evaluated oligosaprobic in site 1, 2 and 6 and β-mesosaprobics in site 3, 4 and 5.
황용강수계에서의 (黃龍江水系) 저서동물의 (底棲動物) 계절적 분포와 생물학적 수질평가에 관한 연구
조영관,배석진,백순기,나철호 ( Young Gwan Cho,Seok Jin Bae,Soon Ki Baik,Chul Ho Ra ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3
The benthic macroinvertebrates in the Hwangryong river occurred 51 species, 42 genera, 26 families, 10 orders, 5 classes in 3 phyla. Among them, aquatic insects containing 44 species were the major group comparing 84.6% of the whole. In particular, a great many Ephemeroptera containing 17 species occurred and Megaloptera were found only in 2 species. Also, there were 4 species of Trichoptera. The comparison of species at each site revealed the largest number of 29 species at site 2 and 3 respectivly, and the smallest was 18 species at site 1. The seasonal number of collected species were similar, as followers; 30 species occurred in winter, 25 species in spring, 28 species in summer, and 22 species in autumn. On comparing individual numbers in this survey, Ephemeroptera were the highest (50%) and Trichoptera were 37%. The most dominant species belonged to Trichoptera and Ephemeroptera. Above all, Uracanthella rufa and Cheumatopsyche brevilineata were dominant. Dominant indices ranged from 0.46 to 0.94. Species diversity indices ranged from 1.04 to 3.00. According to the saprobic system based on the species diversity indices of benthic macroinvertebrates, water quality was β-mesosaprobic in each site. The biological water quality as biotic indices was evaluated from α- to β-mesosaprobic, the pollution indices evaluated β-mesosaprobics, the simple water quality evaluation revealed secondary water quality criteria and the GPI evaluated ranged from oligosaprobics to β-mesosaprobics. The biological water quality evaluation by these indices proved similar to the results of chemical analysis.
조영관,배석진,백순기,이정전 ( Young Gwan Cho,Seok Jin Bae,Soon Ki Baik,Jung Jun Lee ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.3
When wild growing plants such as Alopecurus aegualu var. amurensis were submerged in water for experiment, the conductivity and color of the water increased to a maximum 67 times that of raw water on the edged of Dongbok reservoir. In case of withered matters of Setaria viridis, the variation of color vas small, but when withered matters of Persicaria lapathafolia - which is used for dye materials - were submerged, the increasing rate of water color was very high. The variation of concentration of phosphorus and nitrogen in growing plants such as A. aegualis var, amurensis was 4∼37times and 2.5∼10times higher than that of withered plants(S. viridis and P. lapathafolia). As for treatment method. when ashes of A. aegualis var. amurensis were submerged in water, the concentration of total nitrogen(TN) and total phosphorus(TP) decreased more than that of non-treated. On the contrary, in case of withered matter of Persicaris lapathafolia, when ashes were submerged in water, the concentration of TN and TP increased more than that of the nontreated. Total nitrogen amount from the total plant biomass in the Dongbok reservoir was 12,821㎏ and total phosphorus amount was 1,141㎏. From among them, the amount of TN and TP in Persicaria lapathafolia was larger than that of any other dominant species.
조영관(Young Gwan Cho),이대행(Dae Haeng Lee),명화봉(Hwa Bong Myung),박병훈(Byung Hoon Park),곽명규(Myung Gyu Gwak) 한국수처리학회 2001 한국수처리학회지 Vol.9 No.3
The safety of water quality at several water treatment plant(WTP) in Gwang-ju was investigated when the backwashing water was reused. Concentrations of turbidity, E. coli, NH₃-N, metals in recycled water of Y-WTP were generally low under the standard limit of drinking water. However, turbidity and color of the backwashing water at N-WTP were so high that affected to the water treatment process as coagulation/sedimentation and also increased the amount of sludge in sedimentation basin. When the ratio of recycled water to raw water was increased, much alum was needed and residual turbidity in effluent of sedimentation was also increased. 15% NaCl solution was used to chase the stream characteristics of processes at N-WTP. A drift of one side was occurred because the flow rate of streams and the amount of effluents were different at two sedimentation basins.
정진,조영관,고창옥,김운중,Jeong, Jin,Cho, Young-Gwan,Ko, Chang-Ok,Kim, Un-Jung 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2
The algae in Dongbok reservoir consists of 6 class, 14 orders, 30 families, 63 genera, 145 species, 13 varieties, and 1 formula in 159 taxa during jan. 1995 to Dec. 1999. Species numbers according to major taxa were appeared as Chlorophyceae 80 taxa, Bacillariophyceae 28 taxa, and Cyanophyceae 17 taxa. The ratio of total standing crops were Bacillariopyceae 44%, Cyanophyceae 30%, and Chlorophyceae 225. Various species remarkably appeared during fall to early winter comparing with other seasons. Stnading crops of algae decreased from 1.1~3.7 million units/$\ell$ in 1995 to below 1.0 million n\\units/$\ell$ ever after 1996. Species number was very variable as 9~37 in down stram comparing with 12~34 in middle stream, 15~24 in upper stream. Species diversity indices were 1.1~4.0 in 1995, 1.5~3.5 in 1996~1997, 2.1~3.6 in 1998, and 0.3~3.4 in 1999. Dominant indices were 0.35~0.97 in 1995, 0.44~0.86 in 1996, 0.43~0.89 in 1997, 0.39~0.80 in 1998, and 0.45~0.97 in 1999.
동복호에서의 이취미물질 생성 조류에 관한 연구 - 자연수역 및 배양을 통한 이취미물질 확인
배석진,조영관,이정전,이진종 ( Seok Jin Bae,Young Gwan Cho,Jung Jun Lee,Jin Jong Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.2
In order to research the odor and taste substances naturally produced by algae in the surface water of the Dongbok reservoir, we studied relationship between algal biomass and taste and odors substances in culture fluids, which were analyzed by GC/MS. Alga producing musty or earthy odors in culture media was Anabeana macrospora, Oscillatora tenuis and Phormidium tenue. The slime-producing algae were Microcystis aeruginosa, and the algae causing fishy odor was Eudorina elegans. Odor of cucumber was detected in the culture media of Peridinium, and grassy odor was detected in Synedra acus. The musty odor substance, Geosmin(171ng/L), was mainly produced by Anabaena macrospora in the Dongbok reservoir at May, 1995 when the abundance was very large, 373,740cells/L(23,400 colonies). The products of Geosmin each their colony were 0.007ng/colony. In the culture fluids, Anabaena macrospora and Oscillatoria animals produced geosmin, and Oscillatoria tenuis and Phormidium tenue produced 2-MIB. When chlorinated in culture fluids of algae, about 80% of total amount of odor and taste substances was increased. It may be caused by the release of taste and odor substances inside algae body.
광양천의(光陽川) 수서곤충에 (水棲昆蟲) 대한 생태학적 연구
나철호,조영관 ( Chul Ho Ra,Young Gwan Cho ) 한국하천호수학회 1986 생태와 환경 Vol.19 No.1·2
This ecological studies carried out to survey the insect fauna, community structure, standing crop and environmental factors of the aquiatic insects in the Kwang`yang stream, from January to September, 1985. The aquiatic insect fauna in the Kwang`yang stream is composed of total 154 species, 78 genera, 41 families, 10 orders. The indigenous species in the Kwang`yang stream are Isotomutus schaefferi, Archisotoma sp., Dipteromimus tipulifomis, Strophopteryx faciata, Arctopsyche maculata, A. sp. A, A. sp. B, A. sp. D, Luciola cruciata, Culiodes sp. KA. The percentage of standing crop according to the insect orders are as follows; Ephemeroptera 39.9%, Odonata 2.9%, Plecoptera 8.7%, Megaloptera 12.2%, Trichoptera 28.5%, Coleoptera 2.0%, Diptera 5.5%, Others 0. 3%. In the monthly variation of standing crop, the highest on February (62.8g) and the lowest on August (4.6g). Seasonal variation of standing crop is showed high in winter and spring (24.8∼62.8g), but low in summer and autumn (4.6∼16.1g). According to the surveyed sites, standing crop showed to tendency high at upper (27. 8∼64. lg) and low at lower stream (2.3∼5. 2g), respectively. Epeorus latifolium was a dominant species in the surveyed area. Dominance indices of the upper stream showed low value of 0. 244∼0. 319 and that of the lower stream showed high value of 0.459∼0.839. Species diversity indices represented 4.160 in the Kwang`yang stream, among them, 2. 925∼4. 120 at upper stream, 2. 695∼3.123 at mid stream and 1.023∼1.703 at lower stream. By similarity value, the Kwang`yang stream is divided the three distinctive regions, upper, mid and lower stream, respectively.