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广西海岸带互花米草入侵时空动态遥感监测研究 被引量:1
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作者 陶艳成 潘良浩 +2 位作者 刘文爱 孙仁杰 葛文标 《广西科学》 CAS 北大核心 2023年第4期776-786,共11页
为全面了解和分析外来入侵物种互花米草(Spartina alterniflora)在广西海岸带的时空分布特征与扩散趋势,应用遥感与GIS技术手段,基于多源多时序高分辨率遥感影像对广西海岸带互花米草进行时空动态监测,并结合历史调查资料进行分析。结... 为全面了解和分析外来入侵物种互花米草(Spartina alterniflora)在广西海岸带的时空分布特征与扩散趋势,应用遥感与GIS技术手段,基于多源多时序高分辨率遥感影像对广西海岸带互花米草进行时空动态监测,并结合历史调查资料进行分析。结果表明:2001、2008、2010、2013、2016、2019年广西海岸带互花米草面积分别为46.90、204.05、331.23、608.75、776.99、1320.79 hm 2;2001-2019年,互花米草面积增加了1273.89 hm 2,年均增长率为20.38%。2019年,北海市海岸带互花米草总面积为1317.06 hm 2,占广西互花米草总面积的99.72%;钦州市互花米草面积为3.68 hm 2;互花米草已入侵防城港市,面积约为0.05 hm 2。丹兜海、铁山港湾、廉州湾及北海银滩至营盘镇近岸滩涂是互花米草集中扩张区,且仍处于快速增长阶段;防城港市企沙半岛东侧近岸滩涂及北海市涠洲岛均已出现互花米草零星斑块;广西山口红树林生态国家级自然保护区内互花米草扩散有所减缓,而广西合浦儒艮国家级自然保护区内仍处于增长阶段。广西海岸带互花米草入侵仍处于快速扩张状态,且呈由东往西扩散的趋势。本研究可为广西海岸带互花米草治理提供基础数据和理论指导,对湿地保护、管理和可持续发展具有重要意义。 展开更多
关键词 互花米草 生物入侵 时空动态 高分辨率遥感监测 广西海岸带
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High-resolution remote sensing image-based extensive deformation-induced landslide displacement field monitoring method 被引量:16
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作者 Shanjun Liu Han Wang +1 位作者 Jianwei Huang Lixin Wu 《International Journal of Coal Science & Technology》 EI 2015年第3期170-177,共8页
Landslide is one of the multitudinous serious geological hazards. The key to its control and reduction lies on dynamic monitoring and early warning. The article points out the insufficiency of traditional measuring me... Landslide is one of the multitudinous serious geological hazards. The key to its control and reduction lies on dynamic monitoring and early warning. The article points out the insufficiency of traditional measuring means applied for large-scale landslide monitoring and proposes the method for extensive landslide displacement field monitoring using high- resolution remote images. Matching of cognominal points is realized by using the invariant features of SIFT algorithm in image translation, rotation, zooming, and affine transformation, and through recognition and comparison of characteristics of high-resolution images in different landsliding periods. Following that, landslide displacement vector field can be made known by measuring the distances and directions between cognominal points. As evidenced by field application of the method for landslide monitoring at West Open Mine in Fushun city of China, the method has the attraction of being able to make areal measurement through satellite observation and capable of obtaining at the same time the information of large- area intensive displacement field, for facilitating automatic delimitation of extent of landslide displacement vector field and sliding mass. This can serve as a basis for making analysis of laws governing occurrence of landslide and adoption of countermeasures. 展开更多
关键词 Landslide monitoring High-resolution remote sensing SIFT algorithm Deformation field
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