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Despite huge costs, lining of main canals for conserving water Is considered vital for system's upkeep. Water conservation Is becoming Increasingly Important due to changing weather patterns and rising brackish groundwater. Evaporation during flows Is also too high in major and minor channels. Pilot project of lining 10km of Rohri Canal, usually called 'mini Indus', has been completed in time (cost Rs3.1bn), says Sindh Irrigation Department. This Is Pakistan's first project of canal lining - a lifeline for Sindh's agriculture. It Irrigates 2.6m acres on Indus' left bank. The canal was lined from RD-619 to RD-647. Lining of the remaining 219 miles of the canal too Is Important as it irrigates farms producing huge quantities of sugarcane, rice, cotton and wheat. The...