Target of Water Supply and Stages of Implementation in Chian
2 min readBased on various water resources plans，it is decided that the short term target of water supply is to alleviate water shortage mainly for the domestic and industrial use，while taking the needs of agricultural and ecological use into account.
Water saving should be strongly promoted in agricultural water use by increasing irrigation efficiency in the irrigated area and the irrigated area should be expanded properly by using the saved water.At the same time，original water for agricultural use but taken over for urban and industrial use should be returned to agriculture，to ensure sustainable development of agriculture.
The ecological system will be gradually recovered if the water taken over by urban use can be returned to agriculture use and the over-extraction of groundwater can be controlled.
The guarantee rate required for domestic and industrial water use is relatively high.So the priority of water supply of the Project is paid to domestic and industrial use in normal years.But in wet years，the Project can open the gates along the mains for discharging water to the existing natural river courses for supplementing ecological water and recharging the groundwater aquifer.
Based on the target set for water supply，it is considered that the uncertaint of the increase rate of economy and society may affect the forecast of water demand，and that time is needed for the consumption of newly increased water in the wate receiving area.The government at different levels will take time to complete theirinstitutions for water saving and to secure their investments.Besides，what is more important is to generate benefits of the investment as early as possible and toavoid the overstock of investment.Therefore，the advantages and disadvantages of construction in stages were analyzed during the planning，and decision is made to implement the project in stages，and to expand the water transfer amount after the first conveyance.
