1. College of Water Resources and Architecture EngineeringNorthwest A&F University Yangling 712100 Shaanxi China
2. Institute of Water Saving Agriculture in Arid Regions of ChinaNorthwest A&F University Yangling 712100 Shaanxi China
3. National Engineering Research Center for Water Saving Irrigation at Yangling Yangling 712100 Shaanxi China
4. Department of Land, Air, and Water ResourcesUniversity of California Davis Davis CA 95616 USA
5. Pearl River Hydraulic Research InstitutePearl River Water Resources Commission of the Ministry of Water Resources 510611 Guangzhou China
6. Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water Resources Yangling 712100 Shaanxi China