دراسة لبكتريا أدلة التلوث في الجزء الجنوبي لنهر ديالى-العراق

الملخص EN

shome bacteria] pollution indicators such conform, lecai comorm streptococcus, fecal streptococcus bacteria as well as the total viable count of bacteria in Diayla river were studied , A total of five stations were selected through the last 17 km of the river before connection with Tigris river, where as the St.

I was located 4km north of the new bridge , St.2 after the outflow of Rustamia refinery station, St.

3 after the army canal outflow', St.

4 after 2km from St.3,and St,5 after 4km from St.4 across the old Diayla bridge.

Monthly water samples were taken during the period of Aug, 2002 to March 2003- Inverse relation was found between total viable count of bactcria and water temperature.

The highest monthly percentage of total count of coliform and fecal coliform were found during Decembar (39,0 and 64,3 respectively), where as the percentage for Streptococcus wras 34.9% during March where as , the highest percentage for fecal Streptococcus and bacterial total count was during January (24% and 37.2% respectively).

The lowest percentage of total viable count for bacterial pollution indicators was recorded in St.

1 for all studied period , where as the highest was found in Sc.2 in regard of fecal coliform and Streptococcus (67.3% and 31,2% respectively), St.3 regard to coliform and fecal Streptococcus (36.2% and 32,5% respcc(ively), and St.

4 in regard to total count of bactcria count (29.3%) The lowest seasonal percentage was recorded during summer in regard Streptococcus, fecal Streptococcus and total bactcrial count (2.2%, 8.2% and 4,4% respectively ) , and during autumn in regard to highest percentage was recorded during spring in regard to coliform bacteria (53%) Streptococcus (41,5%) , and total bacterial count (45.6%) , and during Winter in regard lo fecal Coliform (St.7%) and fecal Streptococcus(35%) ,