7Optimizing Water Resources Allocation should Follow the Principle of Balancing Efficiency and Fairness23-24
9Water Quality Standard and Treatment Requirement in the Reuse of Recycling Water in Other Countries26-28
10Present Situation and Promotion of Plastic Pipe Production in Water-saving Irrigation in China36-37
11Studies of Comprehensive Subsidiary Technologies of Water-saving Agriculture in Plain Well-irrigated Areas38-40
16Forming, Present Condition and Control Measures of Secondary Suspended Rivers of the Yellow River in Henan Province58-59