http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이기동,허무명,김범철 江原大學校 附設 環境硏究所 1993 環境硏究 Vol.10 No.-
Phosphorus loading into Lake Daechung was estimated by determining the phosphorus input via runoff from drainage basin and the phosphorus discharge from floating-net fishfarms. The loading from drainage basin was determined by measuring total phosphorus concentration in the four main inflowing streams on the monthly base. Phophorus loading was concentrated in rainy seasons due to higher phosphorus concentration and higher flow rate. Phosphorus discharge from the dam was also high in August and september because of the discharge of intermediate turbid layer formed by storm runoff. P loading via four sites were 52,32,27,and 4tP/yr for Kumkang, Suhwachun, Bochungchun, and Kusin, respectively. Phosphorus discharge of fishfarms was estimated from the amount of fishfeed applied annually and the unit rate of phosphorus excretion per feed weight. The loading from the watershed and fishfarms were calculated to be 138 and 35 tP/yr, respectively. The phosphorus loading of Lake Daechung far exceeded the critical loading for eutrophication. The amount of phosphorus discharge through outflowing water was 46 tP/yr. Thus the retention rate of phosphorus was 0.73