Abstract
Irrigation water use efficiency is an important index to evaluate agricultural water use efficiency of irrigation districts, and is a basic parameter of hydraulic engineering construction and water management. However, there are many problems in practical applications of the traditional irrigation water use efficiency which is based on sufficient irrigation theory. This paper puts forward a new concept and determination method of irrigation water use efficiency based on the theories of deficit irrigation. Finally, we discussed the connotations from the project characteristics, benefit characteristics, spatial scale and time scale characteristics.
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