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정체 수역 내에서 미세조류의 생리생화학적 분석에 의한 수화발생 잠재력 탐색
김미경,신재기,지홍기,Kim, Mi-Kyung,Shin, Jae-Ki,Ji, Hong-Ki 한국조류학회(藻類) 2005 ALGAE Vol.20 No.2
Algal growth potentials were probed by algal growth rates, maximal PSII quantum yields and ATP amount as well as dry weights of algae to evaluate the water fertility due to the algal growth in the stream (CT) and stagnant watershed (WW). Oscillatoria agardhii (CY) and Coelastrum reticulatum (CH) were cultured in nitrogen (N) and phosphorus (P) starvation media (CH-10 medium) and re-inoculated in CT and WW for 7 days. Cell division rates of CY were the highest (k = 7.5) in WW after N starvation, while those of CH were the hight (k = 2.97) in WW after P starvation. The growth of CY was limited by P, while that of CH was by N. Conversely, maximal PSII quantum yields of CH were generally higher than those of CY in CT and WW according to culture time. CY was much more sensibly adapted than CH according to the variations of nutrient amounts in WW. The water fertility was much higher in WW than in CT. The potential assessment tool for water fertility will be able to compensate for the limit of physio-chemical analyses and to be applied as a monitoring system to forecast red-tide.
여운기,장경수,전지영,지홍기,Yeo. Woon-Ki,Jang. Kyung-Soo,Jeon. Ji-Young,Jee. Hong-Kee 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1
The purpose of this study is developing a disaster prevention information system using Internet GIS to manage disaster information more efficiently and timely. This system has good potential with environment of Internet which has appropriate characteristics of rapidity, wide reach, generality, cost effectivity for disaster management. With this system, general user can easily retrieve disaster information with visuality such as maps. graphs, and texts just by using web browsers. Hence the need of developing Internet GIS system for disaster prevention is growing in these days.
月流出量 推定을 위한 回歸模型 : 洛東江 流城을 中心으로 in Nakdong River Watershed
池洪基 영남대학교 공업기술연구소 1984 연구보고 Vol.12 No.1
The stream morphological characteristics of a watershed play a significant role in the analysis of rainfall-runoff relations in a river basin and a quantitative description of these characteristics is essential for determining the appropriate values of physical parameters of a watershed which usually a input data for rainfall-runoff simulation models. Most hydrologic phenomena are the complex and organic products of multiple causations like climatic and hydro-geological factors. In this study, the stream morphological characteristics of the Nakdong river basin, which is one of the major basins of Korea, was determined quantitively by the topographical map. Modeling processes are summarizes as follows; from a simplified equation of water-balance on a watershed a regression model for monthly stream flow using the variables of rainfall, pan evaporation, and previous-month rainfall was formulated. And prediction equations were derived from the stepwise regression analysis of watershed characteristics. It was also possible to explain geographic influences on stream-flow through those prediction equation.