Urban Water Security Index and Its Evaluation Criterion
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Abstract:
Considering the past definitions and characteristics of water security, the definition of urban water security is proposed tentatively. Based on these, the urban water security system is divided into four subsystems, including urban scale subsystem, flood control security subsystem, water supply security subsystem and water environment security subsystem. The evaluation index system and criterion for south China are built, and the weight of each hierarchy is confirmed by the analytical hierarchy process (AHP). The values of indicators are normalized using exponential efficacy function based on the law of diminishing marginal utility. The concepts of coordination index (CI) and development index (DI) are proposed to illustrate the degree of coordination and stability of water security system. The states of urban water security in Wuhan City from 2003 to 2009 are evaluated by the new model. The result shows that the city from 2003 to 2009 is in safe status, and the situation is getting better. The application results verify the feasibility effectiveness of the model.
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