A research on water quality characteristics of Nantong nearshore based on factor analysis and cluster analysis

Ding Yanzhe; Li Fei; Xu Min; Huang Xiaolong; Xu Wenjian

doi:10.3969/j.issn.0253-4193.2014.08.001

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Ding Yanzhe, Li Fei, Xu Min, Huang Xiaolong, Xu Wenjian. A research on water quality characteristics of Nantong nearshore based on factor analysis and cluster analysis[J]. Haiyang Xuebao, 2014, 36(8): 1-11. doi: 10.3969/j.issn.0253-4193.2014.08.001

Citation:

Ding Yanzhe, Li Fei, Xu Min, Huang Xiaolong, Xu Wenjian. A research on water quality characteristics of Nantong nearshore based on factor analysis and cluster analysis[J]. Haiyang Xuebao, 2014, 36(8): 1-11. doi: 10.3969/j.issn.0253-4193.2014.08.001

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A research on water quality characteristics of Nantong nearshore based on factor analysis and cluster analysis

doi: 10.3969/j.issn.0253-4193.2014.08.001

1.
School of Geography Science, Nanjing Normal University, Nanjing 210023, China;Marine Environmental Monitoring Station of Nantong, State Oceanic Administration, Nantong 226005, China
2.
School of Geography Science, Nanjing Normal University, Nanjing 210023, China;National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China
3.
School of Geography Science, Nanjing Normal University, Nanjing 210023, China

Received Date: 2013-10-12
Rev Recd Date: 2014-06-16

Abstract

Abstract

Based on the water quality survey data of three seasons from 16 monitoring sites in 2012,factor analysis was used to study the main factors of water quality and their spatial distribution characteristics. By cluster analysis,we estimated the similarity of the sites and divided Nantong offshore into diverse areas. According to factor analysis,there were four factors impacting water quality of Nantong nearshore. F1 was concentrated in the northwest of Lenjia Sandbank caused by the interactions of runoff of Changjiang River and water from open sea.The concentrations of F2 which reflect the effection of water from open sea in the nearshore part were lower than that in the offshore part.The areas with high-value of F3 which reflect the influence of river input and F4 which represent anthropogenic source were distributed in the estuary of Bencha Canal and the Changjiang River. Nantong offshore marine areas could be divided into 5 areas based on cluster analysis. District A adjacent to lands where river feeds into sea was heavily polluted because of its weak water dynamic condition. Pollution of district B covered tidal channel area was lighter. District C located between district B and district D was influenced by both of them. District D which was under the control of intense water dynamic condition caused by Xiaomiaohong Channel and Wangcanghong Channel was influenced by land-based pollution. Pollutants and flows from the Changjiang River influenced district E to some extent. Different types of partitions indicated strong influence on pollutant distribution caused by regional hydrodynamic pattern.
- inshore waters of Nantong,
- water quality,
- time and space characteristics,
- dynamic geomorphology

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References(26)

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