Spatial and temporal relation rule acquisition of eutrophication in Da’ning River based on rough set theory

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• 作者：Hu Yong Yan^a ; ^{yanhuyong@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Xue Rui Zhang^a ; ¹ ; Jian Hua Dong^a ; ^{dongjianhua@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Ming Sheng Shang^a ; ¹ ; ^{shangmingsheng@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Kun Shan^a ; ^{shankun@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Di Wu^a ; ^{wudi@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Ye Yuan^a ; ^{yuanye@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Xu Wang^a ; ^b ; ^{wangxu@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Hui Meng^a ; ^{menghui@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Yu Huang^a ; ^{huangyu@cigit.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Guo Yin Wang^a ; ¹ ; ^{wanggy@ieee.org" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Rough set ; Spatiotemporal relation ; Eutrophication ; Rule extraction
• 刊名：Ecological Indicators
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：66
• 期：Complete
• 页码：180-189
• 全文大小：1166 K

文摘

Since the mechanisms of eutrophication are complicated and many other factors affect these mechanisms, methods such as quantitative statistics and numerical simulation, have their limitations in analyzing the spatiotemporal relations of eutrophication. The rough set theory (RST) was used to describe the spatiotemporal relations of eutrophication in Da’ning River without any of other prior knowledge. Rules of relations in time and space affecting eutrophication in the Da’ning River backwater area were extracted by taking representation of relations in time and space among eutrophication at a long river section of Da’ning River backwater area, by taking nine sets of encrypted monitoring data in 2003 as example, and by making season, area and eutrophication level as the decision attributes, respectively, to represent specific features of the eutrophication phenomenon in the Da’ning River backwater area from the points of view of time, space, and level by analysis of spatiotemporal relationship rules. This study result shows that the temporal and spatial differences between eutrophication phenomena in the long river section of the Da’ning River backwater area are significant. Eutrophication for each section is less serious in autumn, more in spring and most in summer. Eutrophication degree gradually decreases from estuary to upstream, which is in conformity with reality. The RST of eutrophication in Da’ning River may inform environmental decision-makers and assist them in making more cost-effective decisions.