2016—2021年松嫩平原黑土区季节性地表形变监测与分析  

Monitoring and analysis of seasonal surface deformation in the black soil region of the Songnen Plain from 2016 to 2021

作　　者：古丽米热·甫拉提 张学霞[1,2] 胡韵哲 王景萍 GULIMIRE Fulati;ZHANG Xuexia;HU Yunzhe;WANG Jingping(School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Key Laboratory of State Forestry Administration for Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]北京林业大学水土保持国家林业和草原局重点实验室,北京100083

出　　处：《地理科学进展》2024年第6期1203-1218,共16页Progress in Geography

基　　金：国家重点研发计划项目(2021YFD1500700)。

摘　　要：受全球气候变暖、冻融作用、地壳运动以及人类活动的影响,地表形变对区域生产、生活和生态造成一定威胁。松嫩平原黑土区是中国重要的耕地后备资源,同时也是典型的季节性冻土区,以往的冻土地表形变监测集中在青藏高原等地区,对松嫩平原等高纬度地带的地表形变监测鲜有提及。论文利用68景Sentinel-1合成孔径雷达影像数据,通过D-InSAR技术获取2016年和2021年松嫩平原黑土区融化期、冻结期地表形变结果,通过空间自相关、变化矩阵和平均中心探索地表形变时空分布特征,并结合断裂带、地下水和土地利用方式分析地表形变成因,主要结果如下:(1)融化期形变量均值较冻结期高且变化幅度明显,融化期形变量平均值113 mm,范围为-63~244mm;冻结期形变量平均值23 mm,范围为-64~120 mm;2016—2021年同一季节地表形变量范围呈现收敛特征。(2)松辽盆地季节性地表形变呈现“冻胀融沉”规律,小兴安岭西部山麓地带形变微小;融化期内沉降区逐渐朝东北方向移动,抬升区由东北向西南转移;冻结期内沉降区由绥化市向西部齐齐哈尔市辐散,抬升区由西北部向中南部转移。(3)地表形变量高值区位于断裂带沿线破碎带,地表抬升与岩石富水程度空间分布重合。(4)土地利用方式影响地表形变量,空间上显著相关,其中耕地发生地表形变的情况最普遍。松嫩平原黑土区地表形变呈现季节性分异、年际波动的特征,实时监测地表形变并探究其影响因素可以为农耕管理、地下水调控以及地质灾害预防等提供现实依据。Affected by global climate change,freeze-thaw process,crustal movement,and human activities,surface deformation poses a certain threat to regional production,people's living,and ecology.The black soil region in the Songnen Plain is a vital reservoir of arable land in China and represents a prototypical seasonal frozen soil area.Current monitoring efforts for frozen soil surface deformation have been primarily focusing on high-altitude areas such as the Qinghai-Tibet Plateau,with limited attention to high-latitude regions such as the Songnen Plain black soil area.This study utilized data from 68 scenes of Sentinel-1 synthetic aperture radar images and employed Differential Interferometric Synthetic Aperture Radar(D-InSAR)technology to derive surface deformation data for the melting and freezing periods in 2016 and 2021 in the Songnen Plain black soil area.Through spatial autocorrelation,change transfer matrix,and average center analyses,the spatiotemporal distribution characteristics of surface deformation were investigated.The study also conducted an analysis on the causative factors of surface deformation,considering fault zones,groundwater dynamics,and land use patterns.Key findings include:1)The deformation during the melting period exhibited a higher average and a more significant variation compared to the freezing period.The average deformation during the melting period was 113 mm,with a range from-63 mm to 244 mm.In contrast,the average deformation during the freezing period was 23 mm,with a range from-64 mm to 120 mm.The range of surface deformation variables in the same season from 2016 to 2021 shows convergence.2)Seasonal surface deformation in the Songliao Basin follows a"freeze expansion and thaw subsidence"pattern,with minor deformation observed in the western foothills of the Lesser Khingan Range.During the thawing period,subsidence areas gradually shift northeastward,and uplift areas shift from the northeast to the southwest.During the freezing period,subsidence areas shift from Suihua City to the w

关 键 词：地表形变 Sentinel-1 D-INSAR 冻土 黑土区 松嫩平原 

分 类 号：P237[天文地球—摄影测量与遥感]