Research On Water Saving In Irrigated Regions Diverting From The Yellow River Along The Lower Yellow River

The regions of irrigation water diverting the Yellow River along the lower Yellow River are the important economic development ones. With the economic development, the supply-demands contradictions of water resources in the Yellow River are aggravating increasingly. But at present there is still a serious waste phenomenon in water resources utilization of the Yellow River, especially agricultural irrigation of family with water, its waste phenomenon is more serious. The effective utilization rate of agricultural irrigation water is very low. Its utilization factor is below 0.4 that there are great potentialities on water saving in irrigated regions. In order to explain the tapped potentialities on water saving in irrigated regions diverting the Yellow River qualitatively, based on analyzing main factors of water use level affected, the evaluation quota system of water use level in irrigated regions diverting the Yellow River has been set up. The evaluation model of water use level in irrigated regions diverting the Yellow River has been set up with fuzzy judgment technology, and the water use level in the regions of irrigation water diverting the Yellow River along the lower Yellow River has been evaluated. On this basis, according to water consumption mechanism and process of crops, the relationships, relative influence and effecttransferring between various technology on water saving are fully considered. The calculating method of water saving potentialities on basis of the multiple utilization of water resources in irrigated regions is studied. The calculating model on water saving potentialities is set up. The water saving potentiality in years with different levels in irrigated regions is quantitatively calculated combining the forecasting of development level on water saving technology in irrigated regions for different stages. Through analyzing the existed problems on water saving links in irrigated regions, the suitable ways on water saving in irrigated regions diverting the Yellow River are discussed from water conservancy, agriculture, engineering, management and planning in irrigated regions. In view of practical situation of physical geography, engineering layout, irrigating mode and social economy, the various possible water saving technology and concrete measures suited to characteristics of irrigated regions diverted from the Yellow River are pointed out through research. The water saving potentiality has been objectively analyzed through researching calculating method of water saving potentiality in irrigated regions diverting the Yellow River along the lower Yellow River. It has provided scientific basis for unified management, effective utilization and rational allocation of water resources in the Yellow River basin. The research is of important theoretical significance in evaluation of water use level and calculation of water saving potentiality etc in irrigated regions.