http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
소양호 부영양화에 따른 N/P비의 변화와 남조류 Bloom
허우명,김범철,조규송 江原大學校 附設 環境硏究所 1992 環境硏究 Vol.9 No.-
After the first advent in 1986 two species of Anabaena spiroides and A. macrospora showed increasing dominacy year by year, which is thought to be enhanced by the increase of phosphorus concentration and the decrease of N/P ratio caused mainly by the phosphorus discharge from fishfarms within the lake. The bluegreen algal bloom in a water without nitrogen depletion is the unique feature in Lake Soyang. Nitratenitrogen was maintained always above 0.5mg N/l throughout the year, though the NO3T/TP ratio decreased from 100 in 1984 to 50 in 1990 due to the increase of phosphorus content. High nitrogen concentration and scarcity of gererocyst in trichomes of Anabaena implies that nitrogen fixing ability is not critical for the bluegreen algal dominance in Lake Soyang. In the bag cultivation of Anabaene, the number of heterocysts increased with the addition of phosphorus which induced nitrogen depletion and the reduction of N/P ratio through algal growth.
허우명,Bal Dev Bhattrai,Sungjin Kwak 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.2
This study was based on water quality data of the Lake Doam watershed, monitored from 2010 to 2013 at eight different sites with multiple physiochemical parameters. The dataset was divided into two sub-datasets, namely, non-rainy and rainy. Principal component analysis (PCA) and factor analysis (FA) techniques were applied to evaluate seasonal correla¬tions of water quality parameters and extract the most significant parameters influencing stream water quality. The first five principal components identified by PCA techniques explained greater than 80% of the total variance for both data¬sets. PCA and FA results indicated that total nitrogen, nitrate nitrogen, total phosphorus, and dissolved inorganic phos¬phorus were the most significant parameters under the non-rainy condition. This indicates that organic and inorganic pollutants loads in the streams can be related to discharges from point sources (domestic discharges) and non-point sources (agriculture, forest) of pollution. During the rainy period, turbidity, suspended solids, nitrate nitrogen, and dis¬solved inorganic phosphorus were identified as the most significant parameters. Physical parameters, suspended solids, and turbidity, are related to soil erosion and runoff from the basin. Organic and inorganic pollutants during the rainy period can be linked to decayed matters, manure, and inorganic fertilizers used in farming. Thus, the results of this study suggest that principal component analysis techniques are useful for analysis and interpretation of data and identification of pollution factors, which are valuable for understanding seasonal variations in water quality for effective management
소양호 유역에서 비점오염원의 홍수유출과 오염수괴의 호수내 이동
허우명,김범철,김윤희,최광순 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-
In Korea most of nutrient tending into lakes is concentrated in stormy seasons. Phosphorus lording and transport of turbid storm runoff water was investigated in a reservoir, Lake Soyang, Korea. Concentration of phosphorus was measured at ten meter intervals on the monthly babe in dry seasons and biweekly in stormy seasons. The loading from drainage basin was determined by measuring total phosphorus (TP)concentration in the main in flowing stream, the Soyang River. Because total phosphorus concentration and flow rate of the Soyang River was high in flood period, most of annual phosphorus tending was concentrated in several sporadic storm runoff. In July of 181)8 phosphorus input was 418 tP/month. It was much higher than that in June, 6.0 tP/month. 10% of annual total phosphorus input was discharged through outlet during the period from ,lune to October. Turbidity was much higher(2~ 78 NTU) in stormy seasons than in dry seasons (1 ~ 9 NTU). Cold storm runoff laden with high turbidity and phosphorus flowed into metalimnion along the layer of same densify. Total phosphours concentration of intermediate turbid water ranged from 20 to 230 ?gp/m³. After stormy seasons high nutrient concentration was con-sistently observed at intermediate layer until autumn turnover. In autumn descending mixing depth caused increase of phosphorus concentration in the epilimnion.