The use of water quality index (Canadian model) to determine the validity of the river of Al-diwaniyah - Iraq for irrigation

The current study was conducted to assess the water of the Diwaniyah River for Irrigation by adopting the water quality index - the Canadian model as an effective means of determining the water validity for different purposes. Five stations were selected along the course of the river between January and December 2019. and conducted some Physical and chemical tests, that include (electrical conductivity, pH, SAR, chloride, boron, lead, copper, zinc, cadmium, manganese, chromium). Resultsconfirmed that the values of water quality guide for Irrigation has ranged between (56.12 86.72), which means that the Diwaniya River water is located between the two categories (Marginal - Good).