基于Landsat影像的茅尾海河口地貌演变研究

为了揭示茅尾海河口1987~2015年间的地貌格局演变和冲於演变,基于Landsat TM/OLI等多期遥感影像,结合海图、波段比值线性水深反演模型,对28年来茅尾海河口面积变化、地貌类型转换趋势、地貌冲淤演变过程进行了分析。研究结果表明:在1987~2015年间河口面积逐渐缩小;地貌类型转换趋势方面主要表现为潮沟向淤泥滩、河口沙坝的转化,淤泥滩向红树林滩转化;地貌冲淤演变方面,红树林滩淤积面积较大,达20.78km²,淤泥滩的冲刷作用显著,冲刷面积达26.78km²。研究结果可为未来茅尾海资源的开发建设、整治保护提供理论依据。

Study on the Landform Evolution of Maowei Sea Estuary Based on Landsat Image

Based on the multistage remote sensing images such as Landsat TM/OLI,combined with the linear bathymetric inversion model of chart and band ratio,this paper analyzes the change of Maowei estuary area,the change trend of geomorphology type and the evolution process of geomorphology erosion and siltation in the past 28 years.The results show that the area of estuarine decreased gradually between 1987 and 2015,the transition trend of geomorphologic type was mainly reflected in the transformation of tidal ditch to silt beach and estuarine sand dam,and the transformation of silt beach to mangrove beach.In the aspect of geomorphological erosion and siltation evolution,mangrove beach siltation area was large,up to 20.78 km²,and the scour area was 26.78 km². The research results can provide theoretical basis for the development and construction of Maowei Sea resources in the future.