Ge Maosheng

College of Water Resources and Architectural Engineering, Northwest A&F University, 22 Xinong Rd, Yangling

The application of water-saving irrigation technology has significantly improved the water efficiency of agricultural irrigation, at the same time it brought an increase in irrigation energy consumption and greenhouse gas emissions. In view of the rapid development of efficient water-saving irrigation technology in China in recent years, the relationship between irrigation water and energy was analyzed. The irrigated area in China increased 18.0% in 2015 compared with 2005，Irrigation water consumption increased by 7.9% and the irrigation energy consumption increased by 22.3%. The popularizationof WSI in China has effectively guaranteed food security, improved irrigation efficiency, and kept irrigation energy consumption within a reasonable range.

It is found that the regional distribution of water-energy nexus for irrigation in China is extremely unbalanced. The northern provinces supplied 48.9% of the irrigation water and 56.4% of the irrigation area with 18.8% of the annual average water resources, and provided 78% of the irrigation energy consumption. The irrigation energy consumption per unit volume and per unit area were 3.74 and 2.88 times that of the southern provinces. Water-saving irrigation technology should be vigorously promoted according to local conditions in North China.

Aiming at the demand of green and energy-saving development of high-efficiency water-saving irrigation, a series of green and low energy consumption hose reel sprinkler irrigation systems were developed and applied in production by using clean energy drive, low-pressure nozzle development and pipeline parameter optimization.