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김범철,허우명,황길순 ( Bom Chul Kim,Woo Myung Heo,Gil Son Hwang ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.2
The state of eutrophication in Lake Doam from August 1990 to May 1991 was studied by the measurement of dissolved oxygen, turbidity, phosphorus, and chlorophyll a concentration. And the phosphorus loading from the watershed was measured monthly at the four inflowing stream. The concentration of dissolved oxygen was about 4∼5mgO_2/l in the metalimnion and the hypolimnion in August. At the beginning of the autumn turnover in November the DO concentration was low 5mgO_2/l in the whole water column. Turbidity was higher 90 NTU in the metalimnion of Lake Doam in rainy season. In addion, SRP concentration was higher 120mgP/m^3 in the metalimnion during the rainy season, Chlorophyll a concentration was very high (106mg/m^3) in the epilimnion in September 1990, due to the bloom of Staurastrum sp. The phosphorus input from the watershed was calculated to be 18.2tP/yr. The phosphorus loading of Lake Doam far exceeded the critical loading for eutrophication.
허우명,김범철,황길순,최광순,박원규 ( Woo Myung Heo,Bom Chul Kim,Gil Son Hwang,Kwang Soon Choi,Won Kyu Park ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.2
The longitudinal variations of water quality along the mainstream of the Nakdong River from May 1994 to October was surveyed by the measurement of chlorophyll a, total phosphorus, total nitrogen, dissolved inorganic phosphorus, nitrate-nitrogen, ammonia-nitrogen concentration, and secchi disc transparancy. Chl. a, TP, TN, DIP, NO_3-N and NH_3-N concentration was maintained at high level during the investigation period. And they also showed the peak after the input of Kumho River. Chl. a concentration increased from 14.2mg/m^3 in May to 95.2 in October. TP and TN concentration was maintained always above 100mg/m^3 and 3∼4mgN/l, respectively. TN/TP ratio were less than 16 from June to September with a few exceptions. Therefore, nitrogen is the limiting nutrient in the Nakdong River. Trophic states were in the range of eutrophic to hypertrophic, from 60 to 80.
김범철,허우명,황길순,김동섭,최광순 ( Bom Chul Kim,Woo Myung Heo,GIl Son Hwang,Dong Sup Kim,Kwang Soon Choi ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.2
The distribution of phosphorus in Lake Soyang from January 1985 to August 1992 was surveyed by the measurement of soluble reactive phosphorus(SRP), total dissolved phosphorus(DTP), and total phosphorus(TP) concentration. SRP concentration was in the range of 2∼7mgP/m^3 in epilimnion, and 4∼200mgP/m^3 in hypolimnion. The vertical distribution pattern of SRP showed a large difference with the season. SRP concentration decreased during the growing season of phytoplankton in the epilimnion of Lake Soyang and increased in hypolimnion during the oxygen depletion. Higher concentration near the bottom implies they are diffused from the bottom sediment where organic particles are settled and degraded. SRP, DOP, POP and TP concentration was higher in the metalimnion of Lake Soyang in rainy season. It might be related with storm runoff. General trend of TP variation is that the TP concentration of water column is increasing substantially from year to year. TP concentration in the surface water increased from 5mgP/m^3 at 1985 to 20mgP/m^3 at 1992.
김동섭,김범철,황길순,박주현 ( Dong Sup Kim,Bom Chul Kim,Gil Son Hwang,Ju Hyun Park ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.4
The trend of trophic state change was surveyed in a reservoir, Lake Paldang, that is water resource to capital area. Primary productivity of phytoplankton, chlorophyll a concentration, transparency, total phosphorus concentration, BOD, and COD were measured in 1988, 1990, and 1992-1994 at three sites; dam site, the inlet site of the North Han River, and the inlet site of the South Han River. Tophic state parameters of 1992-1994 showed trend of eutrophication compared with those of 1988. Trophic state was meso-eutrophic in 1988, but it was over eutrophic threshold in 1992. Chlorophyll a concentration at the dam site increased from 2-10 ㎍/ℓ in 1988 to 5-25 in 1992-1994, primary productivity increased from 500-1000 to 1000-2000 ㎎C/㎡/day, total phosphorus concentration increased from 10-30 to 20-120 ㎎/㎥, transparency decreased from 1.5-4 to 0.5-2.0m. Annual phosphorus loading increased from 297 tP/yr in 1988 to 938 tP/yr in 1993. 80% of phosphorus loading was contributed by the South Han River.
남조류의 체외 대사부산물이 다른 조류의 광합성에 미치는 타감작용
김범철,허우명,황길순,안태석,심재형 ( Bom Chul Kim,Woon Myung Heo,Gil Son Hwang,Tae Seok Ahn,Jae Hyung Shim ) 한국환경생물학회 1994 환경생물 : 환경생물학회지 Vol.12 No.1
The effect of cyanobacterial extracellular byproducts upon the algal photosynthesis was assessed to elucidate the allelopathic effect of algal blooms in eutrophic lakes. Algal cultures were filtered with 0.2㎛ membrane filters to remove algal cells and sterilized. 0 to 30㎖ aliquots of filtrate were added to 25㎖ culture suspensions of other algal species, and the ^14C uptake rates were measured. The filtrates of cyanobacterial cultures (Anabaena flos-aquae, Phormidium sp.) inhibited the photosynthesis of green algae (Selenastrum capricornutum and Scenedesmus brasiliensis), while the filtrate of Selenastrum capricornutum and Scenedesmus brasiliensis did not inhibit Anabaena flos-aquae. In the autoinhibition test Anabaena flos-aquae, Selenastrum capricornutum, and Scenedesmus brasiliensis showed positive, negative, and no effects, respectively.
토지이용과 어류 군집의 관계에서 하안 형태복잡도의 매개모형 검증
김진아 ( Jinah Kim ),이상우 ( Sang-woo Lee ),황길순 ( Gil-son Hwang ),김동억 ( Dong-oug Kim ) 한국농공학회 2013 한국농공학회 학술대회초록집 Vol.2013 No.-
Many studies suggested that land uses of area adjacent to stream have strong relationships with stream ecosystem. Urbanized land uses can adverse impact on water quality and biotic communities through the edges of the stream ecosystem. Based on the perspective of landscape ecology, edges treated as important factors in controlling the flow rate of material in two systems, including aquatic ecosystem and terrestrial ecosystem. Numerous studies stated that fish can reflects the status of stream integrity, such as water quality and habitat. In this study, we examined the mediating effect of stream complexity on the relationship between urban land uses and fish. We selected the Nakdong river as study sites. It passes through two major cities such as, Daegu and Busan. To estimate the stream complexity, we use the fractal dimension of a streamline within a 1km-buffer area. We used 5km-buffer to calculate the proportion of urban land use area adjacent to stream and the Index of Biotic Integrity(IBI) data of National Aquatic Ecological Monitoring Program (NAEMP). We verified the full mediation model, to estimate the full mediation model, we set paths among variables (a) from the proportion of urban land use to the stream geometry, and (b) from the stream complexity to the IBI. In the results of full mediation model estimation, the path from the proportion of developed areas to the stream geometry showed β=-0.489(p<0.001) and the path from the stream complexity to the IBI showed β=0.591(p<0.001). In addition, we calculated absolute fit indexes and incremental fit indexes of full mediation model according to previous studies. All of the indexes indicate the enough value that suggests the model is suitable for full mediation effect model(CFI=1.000, TLI= 1.056, RMSEA=0.000). The results of mediation model verification suggested that streamline complexity can be a mediator as reduce the adverse impact of urban land use on fish assemblages. This study expected to applied into stream restorations to enhance the fish in the stream. There is a need to verify other mediation model that it can be explain the mediation effect of streamline complexity on the relationship between fish and land use.
농업용 저수지의 수질특성과 수질개선 -왕궁저수지를 대상으로 -
윤경섭 ( Yoon Kyung-sup ),이광식 ( Lee Kwang-sik ),김형중 ( Kim Hyung-joong ),황길순 ( Hwang Gil-son ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
In spite of considerable advances in water quality control measures within lake, many basic questions concerning an eutrophication still remains unanswered and it becomes obvious that an extensive limnological database is needed for the inter-comparison between bodies of water and for the assessment of the status of lake water quality. In order to diagnose the water environment and assess the changes of the water quality, Wangkung irrigation reservoir was investigated by a long-term monitoring program for the physical, chemical and biological water quality parameters. In addition, these data was used to determine the design elements of natural purification facilities.