疆电外送通道土地覆被时空变化及驱动力分析

Spatial-temporal changes and driving forces analysis of land cover in“Xinjiang power transmission”corridor

探究土地覆被变化及其驱动力对于区域土地资源可持续发展至关重要。然而,疆电外送能源通道建设过程中土地覆被时空变化的深入研究仍然相对匮乏,通道建设对地表覆被的影响仍不明确。本文分析了昌吉回族自治州内的吉泉线10 km缓冲区土地覆被的时序变化特征,并利用多尺度地理加权回归模型(Multi-scale Geographically Weighted Regression,MGWR)探究该区域2010—2022年间土地覆被时空变化及其驱动因素。研究发现:①研究区域以草地、裸地和耕地为主,草地和裸地面积占比超过90%,疆电外送通道建设期间,土地覆被变化更为剧烈且复杂;②驱动因子在时间上存在差异,在通道建设准备与正式建设阶段,到基站的距离与到电网的距离重要性分别位列第1与第2,然而建设完成后运营期间,到水源的距离和最低气温的重要性则分别排名第1和第2;③不同因子在空间上的作用范围存在差异,年最低气温和到水源的距离主要影响草地、裸地和农田区域。研究结果可以为未来类似工程建设提供参考,促进可持续土地利用和生态保护。

Exploring land cover change is very important for the sustainable development of regional land resources.However,there are few studies on land cover change in the construction of Xinjiang electricity transmission energy channel.In this paper,the temporal variation characteristics of land cover in a 10 km buffer zone along Jiquan Line in Changji Hui Autonomous Prefecture were analyzed by using multi-scale geographically weighted regression model(MGWR)to explore the spatio-temporal changes and driving factors of land cover in this region during 2010-2022.The results showed that:①Grassland,bare land and cultivated land were the main areas in the study area,and the proportion of grassland and bare land was more than 90%.During the construction of Xinjiang electricity transmission channel,the land cover changes were more drastic and complicated;②There are differences in the driving factors in terms of time.In the preparation and formal construction stages of the channel con-struction,the distance to the base station and the distance to the power grid rank first and second re-spectively in importance.However,during the operation period after the construction is completed,the distance to the water source and the minimum temperature rank first and second respectively.③The spa-tial ranges of different factors are different.Annual minimum temperature and distance to water source mainly affect grassland,bare land and farmland.The research results can provide reference for the con-struction of similar projects in the future,and promote sustainable land use and ecological protection.