Application of fuzzy comprehensive evaluation to early-warning assessment of ecological security: A case study in Weichang County of Hebei Province

Abstract

Based on the data from 2003 to 2012 related to economy, water environment, land and natural resources of Weichang County, pressure-state-response model is used to construct an ecological security early-warning indicator system of Weichang County from three aspects-pressure, state and response. Fuzzy evaluation method combined with early-warning index and warning degree standard are applied to analyze the ecological security alarm conditions of Weichang County from 2003 to 2012. The results show that the ecological security warning index of Weichang County generally has a fluctuating upward trend from 2003 to 2012, and the value rises from 5.278 1 in 2003 to 6.809 1 in 2012, which means the county is in the "light warning" state, tending to the warning state. In terms of pressure, state, response subsystems, the early-warning index of pressure, state and response is on the rise from 2003 to 2012, which indicates a good development trend.

Keywords

• environmental ecology
• fuzzy comprehensive evaluation
• early-warning assessment of ecological security
• Weichang County
• pressure-state-response model(P-S-R model)
• early-warning index
• warning degree standard