浙江省松阳县亚热带森林干扰与恢复遥感监测OA北大核心CSTPCD

[Objective]Songyang County in Zhejiang Province is rich in forest resources and has great potential for carbon sinks,and is a tertiary linkage area of Baishanzu National Park.This study aims to monitor forest disturbance and restoration in Songyang County,so as to provide an important reference for forest management in this region and ecological protection for Baishanzu National Park.[Method]Using the LandTrendr algorithm of the Google Earth Engine(GEE)cloud platform,as well as Landsat satellite remote sensing time series data from 1987 to 2020,the forest disturbance and restoration status in Songyang County,Zhejiang Province from 1987 to 2020 were detected,and the spatial and temporal characteristics of forest disturbance and restoration were analyzed.[Result](1)The overall accuracy of the LandTrendr algorithm in detecting forest disturbance and restoration reached 82%,and the production accuracyand user accuracy of forest disturbance and restoration were both higher than 80%,indicating that the monitoring of forest disturbance and restoration in Songyang County was effective.(2)The total area of forest disturbance and restoration in Songyang County reached 148.14 and 236.86 km2,accounting for 12.74%and 20.37%of the forest land area,indicating a net increase in forest area in Songyang County from 1987 to 2020.(3)Forest changes in Dadongba Township,Banqiao She Township,Xinxing Township and Yuyan Township in Songyang County were relatively frequent,and the area of forest disturbance and restoration was higher than that in other townships.In particular,the forest area of Dadongba Township changed the most,with an increase of 20.04 km2.[Conclusion]The LandTrendr algorithm based on the GEE cloud platform has achieved precise monitoring of forest disturbance in this county.The overall forest area in Songyang County has shown an increasing trend in the past 30 years.[Ch,3 fig.3 tab.46 ref.]