基于SRP模型的黄河流域甘肃段生态脆弱性评价OA

[Objective]This study aims to evaluate the spatiotemporal evolution of ecological vulnerability in the Gansu section of the Yellow River basin,and to analyze the dynamic changes in ecological sensitivity,resilience,and pressure,so as to provide a scientific basis for regional ecological protection and restoration.[Methods]This study focuses on the Gansu section of the Yellow River basin and employs the SRP model to construct an ecological evaluation index system.The Entropy Evaluation Method is used to determine the weight of each indicator,and a comprehensive evaluation of the ecological vulnerability of the study area is conducted.[Results]1)In 2000,2010,and 2020,the ecological vulnerability of the Gansu section of the Yellow River basin showed a pattern of"high in the south and low in the north",and the area was mainly moderately vulnerable,accounting for 32.03％,45.33％,and 55.97％of the total area in the three periods.2)Over time,by analyzing the ecological vulnerability transfer matrix in the study area,it can be seen that,the area of moderately vulnerable areas in the Gansu section of the Yellow River basin increased by 23.94％,while the slightly vulnerable and mild vulnerable areas decreased by 19.44％and 4.3％,respectively.3)Through the analysis of the ecological vulnerability of cities and prefectures in the study area,it can be seen that the ecological vulnerability of Baiyin area is low,and the ecological vulnerability of Gannan area is high,among which the ecological vulnerability of Baiyin and Qingyang area has changed from slight vulnerability to mild vulnerability,and Pingliang area has changed from slight vulnerability to moderate vulnerability.[Conclusion]Ecological vulnerability in the Gansu section of the Yellow River basin is dominated by moderate vulnerability,with a continuously increasing proportion.Although certain local areas have improved,the region as a whole remains under pressure of ecological degradation,with pronounced spatial heterogeneity.Ecological vulnerability in the Gansu reach of the Yellow River basin is primarily of moderate intensity,albeit with localized areas exhibiting improvement.It is necessary to strengthen soil erosion control and vegetation restoration,and to implement differentiated ecological restoration strategies to enhance ecosystem stability and sustainability.