Disturbance analysis of forest aboveground biomass in power transmission corridors based on multi-source remote sensing data

doi:10.13474/j.cnki.11-2246.2025.1103

Abstract

Abstract: Aboveground biomass (AGB) of forests along transmission corridors is crucial for ecosystem stability and regional carbon cycling,yet quantitative assessments of potential spatial disturbances caused by transmission corridors remain limited.This study focuses on two typical transmission corridors in Fuling district,Chongqing,integrating multi-source remote sensing data including global ecosystem dynamics investigation (GEDI) spaceborne LiDAR,airborne AGB measurements,Sentinel-2 imagery,and shuttle radar topography mission (SRTM) data.A framework is developed for footprint-scale AGB retrieval and regional-scale mapping.Buffer and vertical profile analyses are further applied to quantify the impact of transmission corridors on forest AGB at both landscape and local scales.The footprint-scale AGB retrieval achieves a root mean square error (RMSE) of 19.36 Mg/hm²,and the regional-scale AGB map has an RMSE of 2.04 Mg/hm².Differences in AGB between inner and outer buffer zones are minimal,and fluctuations along vertical profiles are less than 5 Mg/hm².Overall,transmission corridors do not cause significant disturbances to forest AGB.Observed spatial variations in AGB are mainly attributable to natural heterogeneity.

Key words: spaceborne LiDAR, multi-source remote sensing data, power transmission corridor, forest aboveground biomass, disturbance analysis

CLC Number:

P237

LIU Haibo, ZHANG Su, RONG Jingguo, CHANG Jianyang, YANG Zhou. Disturbance analysis of forest aboveground biomass in power transmission corridors based on multi-source remote sensing data[J]. Bulletin of Surveying and Mapping, 2025, 0(11): 15-21,39.

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