摘要
为了合理有效的评估流域内生态风险和优化流域用地类型,探究流域内景观生态风险动态变化及其驱动机制尤为重要。基于GIS技术,结合景观生态学、地理探测器等方法,对研究区土地利用类型变化特征进行分析,同时构建景观生态风险评价模型,定量分析流域内景观生态风险变化趋势及其驱动机制。结果表明:研究区景观类型主要为耕地和草地,各类型景观在水域附近变化差异较大;景观格局指数表现为干扰度指数变化较为剧烈,损失度呈现水域增加的趋势;生态风险等级整体以中等以上为主。驱动机制结果显示,因子探测结果表明人为干扰度对引起景观生态风险动态变化的影响最大;交互探测显示流域景观生态风险动态变化不是由单一因子造成的,主要为2种以上的因子相互作用所致。
In order to reasonably and effectively evaluate the ecological risk in the basin and optimize the land-use type in the basin,it is particularly important to explore the dynamic change of landscape ecological risk in the basin and its driving mechanism.Based on GIS technology,combined with landscape ecology,geographical detector and other methods,we analyzed the characteristics of land-use type change in the study area,and established landscape ecological risk evaluation model to quantitatively analyze the trend and driving mechanism of landscape ecological risk change in the basin.The results show that the main landscape types in the study area are cultivated land and grassland,and the change of each landscape type is very different near the water area.The disturbance index changed sharply,and the loss index showed an increasing trend of water area.The overall ecological risk level is above medium.The factor detection result shows that the degree of human disturbance has the greatest influence on the dynamic change of landscape ecological risk.The interactive detection result shows that the dynamic change of landscape ecological risk is not caused by a single factor,but mainly by the interaction of more than two factors.
作者
王文才
杜嵩
邢晓露
WANG Wencai;DU Song;XING Xiaolu(Henan Provincial Communications Planning&Design Institute Co.,Ltd.,Zhengzhou 450000,China)
出处
《地理空间信息》
2024年第10期70-74,共5页
Geospatial Information
关键词
流域
GIS
景观生态风险评价
驱动机制
watershed
GIS
landscape ecological risk evaluation
driving mechanism
