The data which have been collected for the last three years are used for biological evaluation of the river itself, and to calculate Trent biotic index, Chandler score system and Shannon diversity index. 根据三年来所收集到的资料,计算了Trent生物指数,Chandler记分制以及Shannon多样性指数,并对图们江的污染状况作出生物学评价,上游地段属于清洁水到中污染;