摘要
针对风暴潮系统的需求,对上海市近海水域物质空间分布特点和变化趋势进行计算模拟,并制作海洋水环境要素分布图。提出了对小样本原始数据采用单元格剖分法进行预处理的方法,在该方法中将样点空白网格的默认值设置为海洋水体要素的平均值,并以海洋水环境中的总氮量为例,在GIS仿真环境下采用多种空间插值方法得到分布图。研究表明,普通克里格算法能够更加准确地反映上海市近海水域物质空间分布特点和变化趋势。
In order to meet the requirements of the storm surge system,the spatial distribution characteristics and change trends of Shanghai coastal area were simulated,and the marine water environmental maps were produced.This paper proposed a preprocessing method that grid division on small original samples,in which the default values of sample points on blank grid were set to the average value of marine water elements,then,the volume of nitrogen in the ocean was taken as an example to get the distribution map with different kinds of spatial interpolation methods in the GIS software environment.The research showed that the Kriging spatial interpolation method can better describe the spatial distribution characteristics and change trends of Shanghai coastal water.
出处
《湖南农业科学》
2010年第9期76-79,共4页
Hunan Agricultural Sciences
基金
海洋公益性行业科研专项经费项目(200805016)
上海市教委科技创新基金项目(07ZZ139)
关键词
风暴潮系统
海洋水环境质量检测
小样本数据
空间插值
the storm surge system
marine environmental quality monitoring
small sample data
spatial interpolation
