Through software SPSS 22.0 and its principal component analysis method, BOD5, COD, ammonia nitrogen, TP (total phosphorus), petroleum and TN (total nitrogen) were identified as the significant pollution indexes of the snowmelt runoff in the main urban area of Harbin. 
SPSS
Through software SPSS 22.0 and its principal component analysis method, BOD5, COD, ammonia nitrogen, TP (total phosphorus), petroleum and TN (total nitrogen) were identified as the significant pollution indexes of the snowmelt runoff in the main urban area of Harbin. 
SPSS 22.0