SW—Soil and Water

The manning roughness coefficient n is one of the parameters in designing furrow irrigation. Its appropriate selection is important for efficient water application in field. In this research, the Manning roughness coefficient in ordinary and every other furrow irrigations with different inflow rates (0·4, 0·8, 1·1l s−1) and furrow slopes (0·2 and 0·4%) at various growth stages of wheat with different crop vegetation covers were determined on a...