基于健康与恢复力的生态系统退化风险研究——以坝上高原察汗淖尔流域为例

Ecosystem degradation risk based on health and resilience:A case study of Chahannur Lake basin on Bashang Plateau

【研究目的】基于生态系统的健康状况与恢复力,构建湖泊流域生态系统退化风险评估体系,从流域尺度为生态环境保护及可持续发展提供科学依据。【研究方法】以坝上高原察汗淖尔流域为例,创建生态系统健康与恢复力交互风险评估矩阵,建立生态退化风险评估体系,开展察汗淖尔流域生态系统退化风险评估。【研究结果】察汗淖尔流域内91.10%的区域生态健康状态处于良好,6.66%为优秀;流域22.76%的区域生态恢复力等级为1~2级,75.00%处于3~4级。交互评估结果表明流域27.51%的区域为低生态退化风险较状态,70.25%的区域处于中等状态。【结论】察汗淖尔流域生态系统总体较好,但局部地区由于恢复力较差,导致生态退化风险处于中等。本次研究所提出的评估方法可精准划分流域尺度生态退化风险等级,为科学制定精准生态保护与退化控制措施提供决策依据。

This paper is the result of geological survey engineering.[Objective]Based on the health status and resilience of the ecosystem,a risk assessment system of lake basin ecosystem degradation was constructed to provide a scientific basis for ecological environment protection and sustainable development at the basin scale.[Methods]Taking the Chahannur Lake basin on Bashang Plateau as an example,the interactive risk assessment matrix of ecosystem health and resilience was created,the ecological degradation risk assessment system was established,and the risk assessment of ecosystem degradation in the ChahannurLakebasin was carried out.[Results]91.10%of the region's ecological health was in a good state,and 6.66%was excellent.In the basin,22.76%of the regional ecological resilience level is 1-2,and 75.00%is 3-4.The results of the interactive assessment showed that 27.51%of the basin was in a state of low risk of ecological degradation,and 70.25%of the basin was in a state of medium risk.[Conclusions]The ecosystem of the Chahannur Lake basin is generally good,but the risk of ecological degradation is moderate in local areas due to poor resilience.The assessment method proposed in this study can accurately classify the risk level of ecological degradation at the watershed scale and provide a basis for the scientific decision-making of precise ecological protection and degradation control measures.