空间插值与遥感反演的潮滩沉积物类型精度对比  

Comparison of Sediment Classification Accuracy Between Remote Sensing Retrieval and Spatial Interpolation

作　　者：郑晓丹[1] 张东[1] 张鹰[1] 李欢[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210046

出　　处：《海洋科学进展》2010年第4期515-522,共8页Advances in Marine Science

基　　金：国家自然科学基金项目--潮滩滩面高程的高光谱定量遥感反演方法研究(40606044);教育部高校博士点基金项目--海洋浅水地形遥感反演的关键技术研究(200803190007)

摘　　要：以射阳河口南部潮滩为研究区,分别利用普通克里格插值和遥感反演得到潮滩表层的沉积物组分质量分数,进而获取沉积物类型,并对2种方法进行比较分析。结果表明,研究区分布3种沉积物,分别为粉砂质砂、砂质粉砂和粉砂。根据沉积物分类精度和空间分布特征的对比,空间插值获得的沉积物组分质量分数精度较高,沉积物类型总体分类精度均为87.9%,但高光谱遥感反演出的沉积物组分分布图能较好的反映出沉积物组分的空间异质性特征,沉积物类型的分布也具有更明显的空间变化规律,呈现出由低潮位向岸、由潮沟向滩面颗粒逐渐变细的趋势,这种空间分布特征与采样点粒度分析结果所表现的趋势基本一致,且与研究区的水动力环境特征及沉积物物质来源相吻合。The intertidal flat in the south of the sheyang River estuary is studied.The Kriging interpolation and the remote sensing retrieval are respectively employed to derive the sediment component contents in the samples from the surface of the intertidal flat and to classify the sediment types.It is shown in the results that there are 3 kinds of sediments and they are silty sand,sandy silt,and silt.Also it is learnt from the comparison between the results respectively from the two methods that the sediment component contents derived from the spatial interpolation is more accurate.The sediment classification accuracy is 87.9%,as determined by either of the two method.However the inhomogenity of the sediment component distribution in the tidal flat can be better reflected in the sediment distribution map derived from the hyperspectral remote sensing retrieval,and the sediment spatial distribution has better regularity in the map showing a tendency that the sedimentary grain size becomes gradually finer from the low water level to the beach and from the tidal trench to the intertidal flat surface.The tendency of the sediment spatial distribution is consistent with the results from the grain size analysis of the sedimentary in situ samples,and also consistent with the characterzation of the hydrodynamic environments and with the deposited material source.

关 键 词：沉积物类型 沉积物组分 克里格插值 遥感反演 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]