Progress in water security

The study on the water security research includes the definition,measurement,and countermeasures.The application of indices for security measurement,such as the water resources pressure index,the water resources carrying capacity,the index of socialization of water resources scarcity and water poverty index,and their advantages and disadvantages were discussed.The countermeasures of water resources security were summarized and main measures for the water security were put forward,including perfect of the concept of water environmental security,quantitative analysis of the influence of social economic system on water security,optimal allocation of water resources and system,and virtual water strategy.