국내 영산강과 섬진강의 유기인 분해속도

초록

The variability in the phosphorus concentrations and the decomposition rates of organic phosphorus were measured in two rivers, the Youngsan River and the Sumjin River through four surveys in June, August and December of 2006 and February of 2007. Water samples were incubated for 20 days in a dark incubator and the change of forms of phosphorus (POP, DOP, DIP) were analyzed. By fitting the change to four types of models the decomposition rates of organic phosphorus were determined. The mean total organic phosphorus (TOP) decomposition rate coefficients in the Youngsan River and the Sumjin River were 0.036 day-1 and 0.035 day-1, respectively. In POP→DIP model, the average decomposition rate coefficients in the Youngsan River and the Sumjin River were 0.049 and 0.035 day-1, respectively. The average POP decomposition rate coefficients of POP→DOP→DIP model were 0.042 day-1 and 0.038 day-1 in the Youngsan River and Sumjin River respectively while the mean DOP decomposition rate coefficients were 0.255 day-1 and 0.244 day-1, respectively. In the Youngsan River, the mean POP→DOP decomposition rate coefficient and POP→DIP decomposition rate coefficient of POP→DOP→DIP, POP→DIP model were 0.039 day-1 and 0.007 day-1, respectively. And in the Sumjin River, the above decomposition rate coefficients were 0.031 day-1 and 0.004 day-1, respectively. The decomposition rate coefficients measured in this study might be applicable for modeling of river water quality.

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