Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : BOD


Effects of Discharging Sewage of Baghdad To Tigris River on TheWater Quality

Abbas H. Sulaymon; Ibtihaj A. Abdul Razzak

Engineering and Technology Journal, 2009, Volume 27, Issue 16, Pages 2903-2917

Tigris River one of the rivers that suffer from the effect of conservative pollutants. This study include the distribution of pollutants ( which are BOD5, TDS, pH, T.H., SO4 -2, Na+, and turbidity ) in Tigris river between Al-A'imma bridge and Al-Jumhuria bridge ,a reach which is about (9 km) length within Baghdad city; which include four sewage pumping stations untreated discharged to the river.
It was conclude that the concentrations of pollutants were increase at the discharge points in the river and exceeding the acceptable limits according to the Iraqi standards specification of surface water , then BOD5 and T.H. became within the acceptable values after (7.8 km ) in the study region , and pH, TDS and Na+ were within the acceptable ranges in all stations in the region, while SO4 -2 was exceed the allowable value (250 ppm) in all of the study region, and for turbidity it was reach to (4.5 NTU) on (8 km) in the study region. At the time of low discharges of Tigris river, sewage pumping stations should set at low discharge rate to decrease the pollutant's concentrations in Tigris river .

Monthly Changes of Some Physiochemical Parameters for Tigris River- Baghdad between 2002-2003

Engineering and Technology Journal, 2009, Volume 27, Issue 2, Pages 64-70

A monthly study has been performed during October 2002 to March 2003 for
Tigris river flowing at four stations, the first is Al-Rashdia which is the river enter
Baghdad city, the second near oil vegetables factory in AL-Masbah, the third near
tanning and leather factory in Saeda and the last station in AL-Twetha about 200
kilometers from the site of Tigris river contact with Dyalla river south of Baghdad.
Some environmental parameters such as pH, temperature, turbidity, electrical
conductivity, chloride, total hardness, biological oxygen demand, total suspended
solids and total dissolved solids have been investigated.
It has been found that temperature fill in the range (11.7-30)ºC for four stations
and the values of pH fill in the range (6.6-8.3). AL- Twetha contained the highest
concentration of BOD (7.5 mg/L), turbidity (100 NTU) at March. The highest
values of E.C. (2069 mmhose/cm) at October and chloride (800 mg/L) at November
recorded in Saeda . The highest values of total hardness recorded in AL-Masbah
(225 mg/L) at November. The values of TSS and TDS (480,2210 mg/L) have been
obtained at AL-Masbah and Saeda during March and January respectively.