| Title |
Evaluation of Incheon Coastal Area Water Quality Using Principal Component Analysis |
| Authors |
이흥재 ; 이형진 ; 한진석 ; 권숙표 ( Hung Jae Lee ; Hyung Jin Lee ; Jin Suk Han ; Sook Pyo Kwon ) |
| Abstract |
In this study 14 items of surface water quality of Incheon coastal area were analyzed. And samples were gathered four times a year periodically from April 1985 to October 1988. Varimax rotation was adopted for further explanation of initial factor matrix. From this method five factors were extracted. The results of this study were as follows; 1. An average concentration of COD, SS, T-N, PO₄-P were l.5 ㎎/ℓ, 22.5 ㎎/ℓ , 427.0 ㎍/ℓ and 73.3 ㎍/ℓ respectively. And water quality of Incheon coastal area was deteriorated gradually. 2. From the principal component analysis, variance of Factor 1 was 30.2 %. From Factor 2 to Factor 5, the percent of variance were 13.9%, 10.9%, 8.3% and 7.2% respectively. Therefore cumulative percentage of variance from Factor 1 to Factor 5 was 70.5%. 3. Factor I was artificial pollution pattern by domestic wastewater and industrial wastewater, Factor 2 was natural pollution pattern by precipitation, Factor 3 was physical property pattern by water temperature and dissolved oxygen, Factor 4 was oil pollution pattern and Factor 5 was conservative salinity variation pattern. 4. The groups of sampling sites which were influenced by tidal current in the Incheon coastal area were confirmed. And it is possible to explain partially that the boundaries which were affected by inflow streams through Principal Component Analysis with salinity, SS and PO₄-P. |