摘要
以辽东湾盘锦滩为试验区,利用遥感水边线方法研究了潮间带的冲淤演变,结合遥感水边线和海图0m线边界建立了3个时段的潮滩数字高程模型,获得了辽东湾盘锦滩不同时段近20a来的冲淤空间变化,并用2008年实测地形资料对遥感水边线和反演地形进行了评价。研究结果表明,从Landsat5,4,2合成彩色影像上目视解译的水边线与实测地形走向相近;实测地形与反演地形之间的误差集中在-0.9m～0.8m之间,平均误差为-0.16m,标准偏差为0.40,误差在±0.6m之间的区域占总面积的81.1%。遥感技术作为一种补充手段,可用于潮间带岸滩演变空间分析,其精度有待于进一步提高。
This paper explores the waterline method to study the state of erosion and deposition in intertidal flat.Taking Panjin flat as an experiment area,three period DEMs （Digital Elevation Models） have been constructed based on the waterlines and the chart of 0m lines.As a result,the spatial variation in recent 20 years has been achieved. The results are evaluated by the survey data. The result suggests that：（1） The Landsat 5,4 and 2 composited color image is suitable to extract the waterlines;（2） Compared with the results of the bathymetric chart,relative error was less than 0.6m in most regions,and the mean error is -0.16m. The remote sensing waterline method is useful to analyze the tidal flat change,but the precision needs to be further enhanced.
出处
《海洋通报》
CAS
CSCD
北大核心
2010年第2期176-181,共6页
Marine Science Bulletin
基金
国家自然科学基金项目(40601071)
关键词
遥感水边线
潮间带
冲淤分析
remote sensing waterline
tidal flat
the analysis of erosion and deposition
