陆海统筹下的陆源排放口聚类分析

Cluster analysis of land-sourced sewage outlets based on Jaccard similarity

渤海及黄海北部沿岸主要的入海排放口超过1600个,陆源入海污染物是造成渤海污染的主要来源,将这些排放口进行合理分类归并,可以更有效地对陆源污染源进行管理。从污染物入海后的污染效应角度考虑,计算两个排放口之间的杰卡德相似度,并据此度量排放口之间的距离,用标签传播算法对研究区域岸段进行聚类分析。以渤海湾和莱州湾为例,采用此方法进行聚类分析,将两湾近岸划分为10个社区。该方法可将海洋污染追溯回某区域污染源,将海洋中的污染状况与陆源入海排放口直接联系起来,实现陆海统筹,为渤海污染有效控制提供参考。

There are more than 1600 sewage outlets around the Bohai Sea and the north of Yellow Sea,and thus land-sourced pollutants into the sea have become the main source of pollution in the Bohai Sea.Classifying these sewage outlets in a more reasonable way can manage the terrestrial pollution sources more effectively.Generally,the spatial distance between the sewage outlets is the premise of classification.The Jaccard similarity could measure the distance between two sewage outlets,by considering the effect after pollution entering the sea.Based on this,cluster analysis can be carried out smoothly.Taking Bohai Bay and Laizhou Bay as an example,the research area can be divided into 10 communities,through the cluster analysis of the label propagation algorithm.This method can trace the marine environmental pollutions to terrestrial sources and provide reference for Bohai pollution control management.