为揭示巴音河流域生态环境的综合演化特征,指导当地或类似地区土地利用和生态环境优化管理,选取2005-2020 年 12 景遥感影像数据,基于研究区生态环境问题,引入地理探测器定量探究关键因子,结合生态系统服务和权衡的综合评估模型(integrated valuation of ecosystem services and trade-offs,InVEST),综合运用统计分析、叠加分析、层次分析等方法建立生态环境质量评价模型,揭示流域生态环境的综合演化特征.结果表明:影响流域生态环境质量演化的关键因子为人口数量、国内生产总值、高程和降雨量,流域生态环境质量综合评价值从 0.455增至0.533,整体呈上升趋势.研究区内生态环境质量地域差异明显,14.9%的区域呈现退化状态,主要分布于巴音河流域附近及德令哈市区周边区域;33.6%的区域呈改善状态,分布于巴音河流域中下游湖泊以南区域.研究表明巴音河流域在未来生态环境保护与规划中应更注意城镇化过程中农业及其他生态用地与建设用地的平衡,科学地进行空间格局规划,实现经济与生态的协调发展.
Analyzing the comprehensive evolutionary characteristics of the ecological environment in the Bayin River basin based on Landsat data
This study aims to provide a guide for the optimal management of land use and ecological environment in the Bayin River basin or similar areas by revealing the comprehensive evolution characteristics of the ecological environment in the Bayin River basin.Based on the 12 scenes of remote sensing image data from 2005 to 2020,this study quantitatively explored the critical factors influencing the ecological environment in the study area using a geographical detector.By combining the model for integrated valuation of ecosystem services and trade-offs(InVEST),this study established an ecological environment quality assessment model through statistical analysis,overlay analysis,and analytic hierarchy process,revealing the comprehensive evolutionary characteristics of the ecological environment in the basin.The results show that:① The critical factors influencing the ecological environment quality in the basin included population size,GDP,elevation,and rainfall.The comprehensive assessment value of the ecological environmental quality in the basin increased from 0.455 to 0.533,suggesting an overall upward trend;②The ecological environmental quality in the basin exhibited significant regional differences.Specifically,14.9%of the basin manifested degraded ecological environmental quality,primarily distributed in the vicinity of the Bayin River basin and the surrounding area of Delingha City.In contrast,33.6%displayed improved ecological environmental quality,spreading in areas to the south of lakes in the middle and lower reaches of the Bayin River basin.This study indicates that the future ecological environment protection and planning in the Bayin River basin should focus on the balance between agricultural land and other ecological and construction land during urbanization,thereby achieving coordinated development of economy and ecology through scientific planning of spatial framework.
Bayin River basingeographic detectorInVEST modelecological environment qualityspatio-tem-poral evolution
万方数据
维普
