| Title |
Effects of Sediments on the Growth of Algae at Chusori Area in Daechung Reservoir |
| Authors |
오경희 ( Kyounghee Oh ) ; 김용준 ( Yongjun Kim ) ; 조영철 ( Youngcheol Cho ) |
| DOI |
https://doi.org/10.15681/KSWE.2015.31.5.533 |
| Keywords |
Chusori; Daechung reservoir; Internal loading; Nutrient release rate; Sediment |
| Abstract |
In order to investigate the effect of internal loading from sediment on algal blooming at Chusori area in Daechung Reservoir, the amount and contamination level of sediment and the release rate of total phosphorus were analyzed. The sedimentary layer was consisted with two layers, and the average depth of upper and lower ones were 0.35 and 1.44 m, respectively. The fraction of inorganic phosphorus in the sediment was higher than that of organic phosphorus, and the fractions of phosphorus which responsible for internal loading were very high as in the range of 72.7 and 80.2% of inorganic phosphorus. The C/N ratio of sediment taken with core sampler indicated the organic compounds are originated from settled algae from water body. The average release rate of total phosphorus from sediment was 6.74 (±0.50) mg/m2/day. These results indicated that the internal loading from sediment contributes the excessive algal growth at Churosi area, and the countermeasures to improve the quality of sediments are required to manage algal blooming in Daechung Reservoir. |