基于DPSIR模型的黄河流域兰考县生态安全评价

为探究黄河流域兰考县的生态安全变化，对其生态安全进行定量评价，明确限制区域生态安全的因素，以DPSIR模型为框架，建立5个准则层，选取29个指标构建生态安全评价指标体系，利用熵值法和综合指数法得到生态安全综合指数与生态安全等级。结果表明，兰考县生态安全指数呈现由低到高、逐渐上升的趋势，生态安全等级由“较不安全”向“较安全”转变，警情由“重警”转变为“中警”；从子系统上来看，对区域生态安全贡献最大的是状态、影响和驱动力，响应和压力贡献偏低。研究表明，区域生态系统结构和功能处于稳定状态，区域内生态安全受经济发展水平、人类活动干扰和工业污染物的排放等因素的影响。

Ecological Security Evaluation of Lankao County in the Yellow River Basin Based on DPSIR Model

To explore the ecological security changes of Lankao County in the Yellow River Basin, the quantitative evaluation of ecological security was conducted, and the factors limiting regional ecological security were identified. Using the DPSIR model as the framework, 5 criteria layers were established, and 29 indicators were selected to construct an ecological security evaluation index system. The entropy method and comprehensive index method were used to obtain the comprehensive index and level of ecological security. The results showed that the ecological security index of Lankao County showed a trend of gradually increasing from low to high, with the ecological security level shifting from “less safe” to “safer”, and the police situation shifting from “serious police” to “moderate police”; from the perspective of subsystems, the state, impact, and driving force contributed the most to regional ecological security, while the response and pressure contributions were relatively low. The structure and function of the regional ecosystem were in a stable state, and the ecological security in the region was affected by factors such as the level of economic development, human activity disturbance and industrial pollutant emissions.