Abstract
Abstract In order to solve regional water security issues, such as shortage of water resources, the aggravation of water pollution, the destruction of the ecological environment, etc., this study proposed the flood control security index, resource security index and ecological security index, respectively, according to the construction principle of human development index. Based on the above security indexes, a novel water security comprehensive evaluation model is established by combining the coupling coordination degree model and the state space model. The proposed model has the advantage of simple operation and fast data speed, which is convenient for water security evaluation in different periods and regions. Taking China as an example, the water security conditions were evaluated from 2007 to 2016 for 31 provincial-level administrative regions in China, including flood control security index, resource security index, ecological security index and water security level of each region, and the specific problems of water security in each region were obtained. The evaluation results are consistent with the actual situation in each region, which provides the scientific basis for the local government authorities to formulate the corresponding regional water security policy.
Highlights
Water is essential for maintaining the balance of life and the living environment
Considering that the flood control security index, resource security index and ecological security index are affected by interannual changes, only relying on the evaluation results of a single year to determine the current situation of water security in each region of the study area will lead to a large deviation between the evaluation results and the actual situation
The results show that the water security index of Guangxi is the highest among all administrative regions in the study area (WSI 1⁄4 0.7257), which indicates that the water security in this area is in a safe state
Summary
Water is essential for maintaining the balance of life and the living environment. It is a basic natural resource and strategic resource to promote human economic development and social progress (Masseroni et al ; Wang et al b; Yao et al a, b). Water security refers to the capacity of water resources with quantity and quality guarantee required for human survival and development, which can maintain the basin sustainability and human and ecological environment health, and ensure people’s life and property from water disasters (floods, landslides and droughts)
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