Supply and demand of water resources and analysis of crop water use efficiency in the North China Plain

The shortage of water and the falling of ground water level are important factors limiting sustainable agricultural development in the North China Plain(NCP).Researches include supply and deman of water resources in the NCP,the connotation of water resources utilization based on sustainable agriculture,indicators and their quantification of field crop water use efficiency while the regulating indicators have been analyzed.It provides scientific basis for efficient water use and sustainable management of water resources in the NCP.