본 연구는 낙동강 중류 지역에 9개의 정점을 선정하여, 2002년 5월부터 2003년 1월까지 2개월마다 각각 1회씩 채집 ${cdot}$ 조사하였다. 동정된 부착조류는 모두 102분류군으로 33속 139종 23변종으로 구성되었고, Achnanthes minutissima, Navicula subminuscula, Navicula viridula var. rostellata, Nitzschia inconspicua 및 Nitzschia palea등 5분류군이 조사 기간 내내 출현하였다. 본 조사정점의 DAlpo의 월 평균값의 범위는 30.90${sim}$44.61로 ${eta}$-중부수성이었다.
In order to the epilithic diatom community and an assessment of water quality with diatom assemblage index of organic water pollution (DAlpo) in the middle reaches of the Nakdong River, the samples were collected from nine sampling stations on May, July, September, November, 2002 and on January 2003. A total 162 taxa was identified from this study, which were classified into 139 species and 23 varieties belonging to 33 genera. Achnanthes minutissima, Navicula subminuscula, Navicula viridula var. rostellata, Nitzschia inconspicua and Nitzschia palea indentified in every stations and examination for the whole periods. A total of 12 taxa was dominant species at any station at least one more times. In this study, average DAlpo was 30.90 ${sim}$ 44.61 and the saprobic level was estimated ${eta}$-mesosaprobic in the middle reaches of the Nakdong River.
