تباين الخصائص الهيدرولوجية لنهر ديالى في الحوض الأسفل

Abstract EN

Dialay river is considered the main source in the study area on wich 80% of Water various needs depend .

The year - round dischagrge of this river decreases during the priod of 2001 to 2017 ( 2.29 M.m3 ) Compared year(5.39 M.m3 / year) from 1984- 2000 in the location of dischagrge recording a coefficient of variation about 150%.

The dischagrge decreased during the dry years to( 1.23 M.m3 / year), in Comparison with the dischagrge of the dry years in the first period (2.84 M.m3 / year).

The repeated dry increased to now 70% Compared with the firt priod 17% .

The Salinity (Ec)also increases from 0.54 DC/m from 1989 to 1990 to reach (1.1) DC/m from 2016 to 2017 in Himreen location .

in the mouth, this Salinity increases from (2.0) to (4.4) DC/m from 2016 to 2017