تقييم ﻧﻮﻋﯿﺔ ﻣﯿﺎه اﻟﻤﺼﺐ اﻟﻌﺎم ﻓﻲ ﻣﺤﺎﻓﻈﺔ اﻟﺪﯾﻮاﻧﯿﺔ و ﺑﯿﺎن ﻣﺪى ﺻﻼﺣﯿﺘﮭﺎ ﻟﻸﺳﺘﺨﺪاﻣﺎت اﻟﻤﺨﺘﻠﻔﺔ

The chemical quality of main out full drain water in the Diwaniyah province and availability to use it for different purposes were studied in this work. Seven sites were selected along of the river. Season Results revealed an electrical conductivity (EC) ranged from (4.55-9.99) ds/m, total dissolve solid (TDS) (2910- 6580) ppm, Sodium Adsorption Ratio(SAR) (5.1-9.99 ). Water quality of main out full drain river were evaluated according to FAO 1992 . They were moderate saline water, primary drainage water and ground water. There was no risk from Sodium Adsroption Ratio to affect soil permeability. The concentration of heavy metals ( pb,cd,cu,zn,Mn,Fe) were very little and not accessed tolerant guideline of irrigation water and not reached the toxic limit in water, soil and plant . We concluded the main out full drain water can be consider suitable for irrigation under good management by using extra amount of water with leaching requirement of 15%-20%, and under certain conditions under good, management, drainage system, deep ground water to keep soil salt balance and highly salt tolerant plants. lt is important to avoid using this water for animal consumption because of its high salt content and the risk of diarrhea or even death of the animal