Realationship Between TOC,Oxygen Demanding Values and Na,Cl Ion Concentration in the Sum River and Wonju Stream Area

Abstract

Relationship between the various oxygen demanding values and concentrations of Na, Cl ions in Sum river and Wonju stream were investigated. r2 value between TOC and, sodium and chloride ions turn out to be 0.7124 and 0.7237, respectively which implies strong relationship between theses physical data. r2 values between Na and other oxygen demanding values, such as BOD, CODMn and CODCr, showed rather poor relationships. r2 values between Cl and other oxygen demanding values also provided poor relationships. The r2 values between Na and Cl ion concentrations were 0.9705. These data means the major source of Na and Cl ion is the ionization of NaCl which might be come from city sewage. As seen on Kim's previous paper, the increase of NaCl concentration is due to the city sewage, and these data implies the major contribution of increasing TOC value in Wonju stream and Sum River can be a city sewage.