Suitability Assessment of Surface Water Quality for Irrigation: A Case Study of Modjo River, Ethiopia

Table 6

Guidelines for interpretation of potential effect of irrigation water quality by using EC_w and SAR together (Source: [5]).

			Degree of restriction on use
			None	Slight to moderate	Severe
SAR 0–3	And	ECW	>0.7	0.7–0.2	<0.2
SAR 3–6		ECW	>1.2	1.2–0.3	<0.3
SAR 6–12		ECW	>1.9	1.9–0.5	<0.5
SAR 12–20		ECW	>2.9	2.9–1.3	<1.3
SAR 20–40		ECW	>5.0	5.0–2.9	<2.9