摘要
根据海水污染物分布扩散规律和采样点之间的关系,给出了一种自适应凸包选点的IDW(inverse distance weight)插值方法。该方法为一种局部的IDW插值方法,为插值结点加入了空间位置的概念,克服了传统IDW方法只和插值结点的距离有关而和其空间位置无关的弱点。通过与传统IDW在2011年的渤海无机氮评价结果的对比,说明该方法能够很好的反映海水污染物空间分布状况。
According to the relation between the movement law of pollutant diffusion and sampling points,the paper presents an IDW interpolation method with choosing convex hull points adaptively. By introducing the concept of spatial locations for nods,the interpolation method being local overcomes the weakness that the traditional IDW have close relationship with their distances and far away from their space structures. From results of applications for the assessment of inorganic nitrogen in the Bohai Sea in 2011,it is clear that the new IDW can give the spatial distribution of pollutants more accurately than the traditional.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2014年第2期258-261,共4页
Marine Environmental Science
基金
海洋公益性行业科研专项(201005014)
国家自然科学基金青年科学基金(21107019)
关键词
水质评价
IDW
自适应
凸包
water quality assessment
IDW
self-adaptation
convex hull
