دراسة موسمية لبعض الخصائص الفيزيائية والكيميائية لمياه ورواسب نهر الغراف

Abstract

The physical and chemical parameters of water and sediments for Garaf river
during four seasons from summer 2007 until spring 2008 were studied in ten
locations alongside the river starting from The Kut Dam when the river branching
from the Tigris to its end in the northern of Nassiria city .The stations were chosen
according to population density and pollution probability. The investigated
parameters include temperature, pH, conductivity, total alkalinity, calcium,
magnesium, chloride, phosphate, nitrate ,sulfate, sodium, potassium and lithium for
water and sediment .
Water temperature ranged between(17 - 34) C⁰(18 -37) C^o
which in accordance with air . pH values for the ten locations throughout the year period of study
located between (6.9 -8.3),also the sediments recorded low alkalinity, ranged between 7.4- 8.4 .
The highest conductivity for water recorded 1292 µS/cm but the lowest was 928
µS/cm. While the sediments showed a high rate of conductivity 1793 µs/cm and the
lowest was 1221 µS/cm. The high total alkalinity for water recorded 373 mg/l but the
lowest was114 mg/l. while the sediments showed a high rate of total
alkalinity270mg/l the lowest value123mg/l.The total chloride, calcium, magnesium,
sulfate, phosphate ,nitrate, sodium, potassium, and lithium for water ranged
between( 265-123) mg/l (112-64)mg/l (93-19)mg/l (167-123)mg/l (0.8-0.1)mg/l (7.5-
1.9)mg/l (123-24)mg/l (97-12)mg/l (0.8-0.1) mg/l respectively while for sediment they
ranged between(265-140) mg/l (144-65)mg/l (68-23 )mg/l (278 -57)mg/l (5.3-1.2)mg/l
(20-10.2)mg/l (117-58)mg/l (77-24)mg/l (2.2-0.1) mg/l respectively .