| Title |
On the Prediction of Nutrients and Chlorophyll Concentration in an Artificial Lake |
| Abstract |
This investigation were carried out to find the trophic level in an artificial lake to estimate the chlorophyll-a concentration on basis of limitting factor of water qualities data on influent of Spring, comparing with the actual those of Summer season, and judge the feasibility of developed models to the artificial lake. The results obtained are as follows. Summer mean values of the artificial lake of shinhoon showed that chlorophyll-a concentration was 69.2 ㎍/ℓ, Secchi depth, 1.625m and Hypolimnetic Oxygen Depletion Rate, 1,476 g/㎡/d. If inorganic carbon, total phosphorus, and total nitrogen of Spring are individually considered as a limihing factor, the predictive values of chlorophyll-a are 215 ㎍/ℓbased on Carbon, 231 ㎍/ℓbased on total phosphorus, and 874 ㎍/ℓbased on total nitrogen. According to these values, carbon might be a limitting factor of phytoplanktion growth in an artificial lake. When the phosphorus lading of Spring in the artificial lake was applied to Vollenweider-OECD model, the values at the best fit lines showed that chlorophyll-a was 20.4 ㎍/ℓ, Secchi depth, 1.505m, and Hypolimnetic Oxygen Depletion Rate, 0.775 g/㎡/d. In order to develop the prediction model of water quality for water bodies in Korea, it is needed to collect the broad and reliable data for a long time. |